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DST, Decision Support Tool for energy-efficient and sustainable renovation of dwellings . What is a DST? DST is a tool, containing simple guidelines to help energy-efficient and sustainable renovation of dwellings.

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DST, Decision Support Tool for

energy-efficient and sustainable renovation of dwellings

  • What is a DST?

  • DST is a tool, containing simple guidelines to help energy-efficient and sustainable renovation of dwellings.

  • DEMOHOUSE project aims to develop minimum standards for energy-efficient and sustainable renovation of dwellings.

  • Main decisions in relation to ambitions in energy-efficiency, sustainability, economic feasibility and occupants’ participation take place in the first, or the initiative phase.

  • For whom is the DST?

  • The Decision Support Tool is focusing on decision makers (for example housing association managers, home owners association, etc. ).

  • The tool also contains practical and in-depth information of relevance to: architects, energy experts, building contractors, and building users.

  • What kind of decisions are supported with the DST?

  • Decision making process towards facilitating energy-efficient and sustainable renovation of dwellings.

Why energy efficient renovations ?

How energy efficient renovations ?

Barriers and Opportunities

Demohouse Renovation Projects


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Why an energy-efficient and

sustainable renovation?

Quality indicators as benefits associated with this type of renovation.

DST home page

Lettability

Property Value

Social Status

Comfort

Property Value

Lettability

Energy Labeling

Comfort

Social Status

Living Costs

Environment

Environment

Living Costs

Energy Labeling

How energy efficient renovations ?

Why energy efficient renovations ?


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Enhanced Property Value

  • Energy efficiency is rapidly becoming a factor in the value or selling price of dwellings.

  • Customers are increasingly becoming prepared to pay for improved living comfort.

  • The EPBD, Energy Performance Building Directive, energy label of the dwelling will influence its market position.

  • A ‘good’ EPBD energy label results in a positive image for marketing and selling purposes.

DST home page

Property Value

Lettability

Energy Labeling

Comfort

Social Status

Living Costs

Environment

How energy efficient renovations ?

Why energy efficient renovations ?


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  • Improved Lettability

  • If tenants can choose between a label A and label Cdwelling, they will prefer the label A.

  • In a mild rental housing market, energy efficiency (the EPBD energy label) will influence lettability.

  • Satisfied inhabitants are the best advertisements for energy efficient house retrofit.

DST home page

Property Value

Lettability

Energy Labeling

Comfort

Social Status

Living Costs

Environment

How energy efficient renovations ?

Why energy efficient renovations ?


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Improved Building Energy Labeling

After Renovation

  • EPBD, Energy Performance Building Directive label reflects the energy efficiency of a dwelling on a scale from A to G.

  • Label A reflects the best energy performance and label G reflects the lowest energy performance.

  • Energy Efficient renovation will yield a higher label.

  • It is the obligation of the building owner to hand over an Energy Performance Certificate that shows the energy performance of the dwelling with the corresponding EPBD label when selling or letting a dwelling.

Before Renovation

Building energy label

DST home page

Property Value

Lettability

Energy Labeling

Comfort

Social Status

Living Costs

Environment

Recommended reading

D13 New management

Strategies. To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

How energy efficient renovations ?

Why energy efficient renovations ?


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  • Comfort

  • Comfortable indoor climate as a result of eliminating heat losses and cold draughts with high level of insulation and air-tightness of the building skin, in particular around windows.

  • Sound reduction using energy efficient and air-tight fitted windows and doors in addition to draught reduction.

  • Prevention of condensation on indoor surfaces, thus preventing growth of moulds and fungus.

  • Prevention of moist indoor air penetrating the structure, causing condensation resulting in possible structural damages due to decay, corrosion and frost.

  • The constant air renewal with a mechanical ventilation system provides good indoor air quality, removing odours and harmful indoor pollutants.

  • Thermal comfort for tenants. Comfortable room temperatures all year round.

DST home page

Property Value

Lettability

Energy Labeling

Comfort

Social Status

Living Costs

Environment

How energy efficient renovations ?

Why energy efficient renovations ?


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Social Status

  • Sustainable renovation supports improvement of the neighbourhood image, attracting tenants of good social background.

  • Sustainable renovation supports identification with the neighbourhood.

DST home page

Property Value

Lettability

Energy Labeling

Comfort

Social Status

Living Costs

Environment

How energy efficient renovations ?

Why energy efficient renovations ?


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  • Lower Living Costs and Affordability

  • Lower energy costs mean lower living cost for owner occupants and tenants.

  • Lower living costs result in an increased affordability of the housing for lower income groups.

  • Lowering living costs is a key task for social housing organisations.

  • An energy efficient dwelling is ‘future proof’ against rising energy prices.

DST home page

Property Value

Lettability

Energy Labeling

Comfort

Social Status

Living Costs

Environment

How energy efficient renovations ?

Why energy efficient renovations ?


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  • Environment

  • Low energy consumption after renovation results in lower CO2 emissions and therefore a lower impact on the environment.

  • Use of sustainable building materials, water treatment and reuse also results in a lower impact on the environment.

  • It was demonstrated in all Demohouse renovation projectspercentages of energy savings compared to pre-retrofitting situation from 50 to 85%.

DST home page

Image source:

http://energypicturesonline.com

D9 Life Cycle Optimisation

and CO2 Reduction.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Property Value

Lettability

Energy Labeling

Comfort

Social Status

Living Costs

Environment

D16.1Demohouse renovation

projects assessment of

environmental, economical

and social impacts.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

How energy efficient renovations ?

Why energy efficient renovations ?


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Barriers and opportunities for an

energy-efficient and sustainable renovation

DST home page

Architectural

Financial

Legal

ArchitecturalFinancial

Legal

Social

Technical

D1C Barriers to

sustainable renovations.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Social

Technical

How energy efficient renovations ?

Why energy efficient renovations ?


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Barriers and opportunities for an

energy-efficient and sustainable renovation

Architectural

  • Preserving the façade of a monumental building may prevent application of external insulation.

  • Internal insulation is often possible but requires careful design to prevent condensation within the facade.

  • Preserving the look of the façade opens opportunities for innovative designs.

Danish Demohouse

before renovation

DST home page

ArchitecturalFinancial

Legal

Social

Technical

Danish Demohouse

after renovation

How energy efficient renovations ?

Why energy efficient renovations ?


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Barriers and opportunities for an

energy-efficient and sustainable renovation

Financial

  • Profitability: increased height of investment is regarded as a barrier, while increased market value at the same time can be an opportunity.

  • Financial consequences for the tenants: rent increase (barrier) versus lower living costs (opportunity).

  • Marketability: need for extra promotional effort (barrier) versus higher appeal to potential buyers and enter new markets (opportunities).

  • High payback times and higher economical risks can be a barrier, while banks are considering energy efficiency as a new field of interest.

DST home page

ArchitecturalFinancial

Legal

Social

Technical

How energy efficient renovations ?

Why energy efficient renovations ?


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Barriers and opportunities for an

energy-efficient and sustainable renovation

Financial

  • One of the main barriers of energy efficient renovation is the extra investment required, compared to a ‘standard’ or ‘business as usual’ renovation.

  • Several options exist to (help) overcome the financial barrier, e.g novel financial models:

DST home page

ESCO, Energy Service Company

Low Cost components e.g. HRV-unit

Roof top apartment

ArchitecturalFinancial

Legal

Social

Technical

How energy efficient renovations ?

Why energy efficient renovations ?


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Barriers and opportunities for an

energy-efficient and sustainable renovation

Legal and administrative issues

  • Legal and administrative constraints (permits, procedures) can be a barrier.

  • Lack of existing legislation can be a barrier.

  • Governmental institutions encouraging sustainability in buildings can be an opportunity.

DST home page

ArchitecturalFinancial

Legal

Social

Technical

How energy efficient renovations ?

Why energy efficient renovations ?


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Barriers and opportunities for an

energy-efficient and sustainable renovation

  • Social

  • Usually there is a high percentage of support needed amongst the present tenants for collective measures.

  • Even when tenant consensus is not formally required, the tenants will be more willing to cooperate and be happier with the result if they can have a say in the process.

  • If tenants can participate in finding solutions, they will be more readily accepted.

  • Lack of knowledge can be a motivational problem. Visit to efficient-renovation examples and monitored results can be used to inform and educate tenants.

  • Temporary re-housing during construction works is an additional barrier for support of the present occupants.

  • Keeping the renovation period as short as possible to avoid length of temporary re-housing. Offering bonus tickets to visit local attractions, parks, etc. can greatly please the tenants.

DST home page

ArchitecturalFinancial

Legal

Social

Technical

How energy efficient renovations ?

Why energy efficient renovations ?


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Barriers and opportunities for an

energy-efficient and sustainable renovation

Technical

  • Some solutions require complex installations that people may not understand how to use. As a result, energy savings will be lower than expected. Try to use user friendly technologies/interfaces.

  • Experience shows that in any renovation process, errors or failures occur. With Quality Control during the renovation, these can be corrected.

  • More information Thermohraphic Camera test

  • More information Blower Door test

  • Lack of knowledge/technical know-how can be a barrier in the steps of the building process. However, once the knowledge/experience is gained, it will be a competitiveadvantage.

DST home page

ArchitecturalFinancial

Legal

Social

Technical

How energy efficient renovations ?

Why energy efficient renovations ?


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How to do an energy-efficient, affordable

and sustainable renovation?

Is addressed through three main aspects categorised as:

DST home page

Technical aspect

Financial aspect

Social aspect

Financial aspect

Technical aspect

Social aspect


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  • Technical aspect

  • The first step in a renovation is to set the target for the energy consumption. A good indicator is the energy need for heating per m2 of floor area per annum (kWh/m2a).

  • One m3 of natural gas or 1 liter of oil equals about 10 kWh of heat. So the indicator for a dwelling of 100 m2 consuming 1500 m3 of natural gas per year is 1500 x 10 kWh/a/ 100 m2 or 150 kWh/m2a, (where the a stands for annual or yearly).

  • Typically a household use 300-500 m3 of gas for DHW (Domestic Hot Water) so if you only know the total gas consumption, this number has to be deducted from the total to arrive at the number for space heating.

  • Some low energy values for space heating:

  • - 15 kWh/m2a to reach the German Passive House Standard for new built.

  • - 25-30 kWh/m2a for a ‘Passive House’ renovation.

  • - 50 kWh/m2a for a low energy building.

  • - 100 kwh/m2a for a typically built.

DST home page

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

Demohouse Renovations

Lessons learned


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  • Technical aspect

  • The first step in energy efficient renovation is minimising the demand, by the following 3 steps:

  • Insulating of the building skin (walls, high efficiency glazing).

  • 2. Minimising the air leakage to avoid ‘infiltration (unwanted cold air entering the building).

  • Heat recovery in the ventilation system.

  • The second step is introduction of renewable energy (solar collectors, PhotoVoltaic or PV cells)

  • The final step is introduction of efficient equipment, such as a condensing gas fired boiler or heat pump.

  • When the target level for energy in the renovation is set and a general idea is formed on which measures to invest, the design team can work on design and technical specification of the renovation.

DST home page

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

Demohouse Renovations

Lessons learned


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  • Technical aspect

  • Further information and guidance

    • ‘Rules of thumb’ on energy efficiency, application of renewable energy and different improvement techniques and target values applied on:

      • The building envelope

      • Building services

      • Best Available Technologies, BAT

      • Low-cost Technical Solutions

    • Construction Quality Control Tools

    • Thermographic Camera Test

    • Blower Door Test

    • Awareness Tools

    • The Green Questionnaire

    • Evaluation Tools

    • Energy Signature

    • Common Evaluation Protocol

    • Demohouse Renovation Projects

    • Lessons learned

DST home page

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

Demohouse Renovations

Lessons learned


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BAT, Best Available Technologies for energy efficient renovation

Information on the present state of each Best Practice

Technology in Europe for energy-efficient renovations is

shown below. It includes the expected target/goal

values for 2011, when stricter requirements are expected

based on the EPBD, Energy Performance Building

Directive.

Europe is divided into three zones based on climatic regions:

Zone I: Northern Europe

Zone II: Central Europe

Zone III: Southern Europe

Best Available Technologies:

To view any of items below go to:

http://www.demohouse.net/reports/monitoring/best-available-technologies/

- Insulation

- Low energy windows

- Air tight constructions

- Heat recovery ventilation

- Condensing gas boilers

- District heating systems

- Combined heat and power production

- Heat pumps

- Natural, hybrid and PV-assisted ventilation

- Solar domestic hot water heating systems

- PV installations

DST home page

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

D1 State of the Art.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

D6 Catalogue of Best Available

Technologies. To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Demohouse Renovations

Lessons learned


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  • Low-cost Technical Solutions

  • As part of the Danish Demohouse renovation project, a cost-effective heat recovery ventilation unit was developed with good thermal efficiency, low electricity consumption and low noise level and easy installation to existing exhaust system.

  • It can be integrated along the walls or loft in a simple way and with simple maintenance (e.g. change of filter).

  • The improved HRV unit design makes an installed price per appartment of less than 3000 EURO possible.

Filterbox in kitchen with two filters.

DST home page

Technical aspect

Financial aspect

Social aspect

Three parts for low-cost HRV unit.

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

HRV duct work in kitchen (to be painted white).

D1 State of the Art.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

D6 Catalogue of Best

Available Technologies.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Demohouse Renovations

Lessons learned


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  • Low-cost Technical Solutions

  • Lightweight CO2 Neutral Pre-fabricated low energy roof top apartment

  • Prototype developed as part of the Danish Demohouse renovation project.

  • Sale of such apartments at a good price (good views) can (partly) cover extra investments for energy efficient renovation.

DST home page

Roof top apartment more information

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

Roof top apartment demonstration

Demohouse Renovations

Lessons learned


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  • Roof top apartment

  • Technical information:

  • Prefabricated components produced with high quality and reduced cost.

  • Advantages: well insulated, air-tight prefabrication. Low overall weight (placed on existing roof of a concrete housing block).

    • It includes:

    • -Heat recovery ventilation unit placed in a partition wall (EcoVent)

    • Ventilation air preheat in the metal roof, air solar collector (Rannilla)

    • 13 m² PV modules covering ventilation and lighting demand from solar energy

    • An air tight timber-frame construction with paper granulate-insulation and minimised thermal bridges ( U-value: 0.15 – 0.18 W/m²K)

    • Highly energy efficient windows.

DST home page

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

Roof top apartment demonstration.

Danish Demohouse.

Demohouse Renovations

Lessons learned


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The Green Build Questionnaire

  • The Green Build Questionnaire is based on the Danish developed Green Build Tool, which works as an energy and environmental point system.

  • It was developed by Cenergia, Denmark.

  • When used the questionnaire assess all sustainable renovation building measures included in the renovation project.

  • This includes measures concerning sustainability related to:

  • - Water, rainwater and sewage

  • - Indoor air climate

  • - Materials and constructions

  • - Waste

  • - Energy

  • - Building and urban development area

  • The user should use the questionnaire in two phases:

  • - 1. Provides guidance through intentions in the renovation.

  • - 2. Provides advise on optimum renovation measures at the kick-off of the building process when all renovation details are known.

  • As a result, the energy and environmental points get one of the A to M rating categories.

DST home page

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

The Green Build Questionnaire

To see the Questionnnaire select:

http://www.demohouse.net/reports/monitoring/other/

Demohouse Renovations

Lessons learned


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Construction Quality Control Techniques

Thermographic Camera Test

  • Used to identify existence of thermal bridges in buildings

  • Picture are taken with an infra red camera

  • On the infrared photograph different colours show different temperature of each object

  • In this way hot and cold parts of a building are visualised and identified

  • It can be used to show the heat radiation and any parts of missing insulation in walls

  • It is also an effective method to show moisture damage, especially in old buildings

DST home page

Before renovation

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

After renovation

D8.1 Monitoring Programme in

Demohouse renovation buildings.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Demohouse Renovations

Lessons learned


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Construction Quality Control Techniques

Thermographic Camera Test

  • Construction Quality Control in the course of the renovation appears to be very important in order to reveal potential faults within construction work.

  • In the Austrian Demohouse project project, thermographic photographs taken after the renovation revealed missing parts of insulation of the building envelope. As a result the contractor was responsible for repair.

  • The price of the thermographic quality control investigation by a specialist company is a fraction of the overall building cost (typically around 1000 €).

  • The long term benefits of giving finding out and correcting incorrect placement of insulation, cold bridges, air leakages outweight the costs of cost of investigation.

DST home page

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

D8.1 Monitoring Programme in

Demohouse renovation buildings.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Demohouse Renovations

Lessons learned

Missing insulation around the entrance detected with thermography and had to be rectified by the building contractor.


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  • Construction Quality Control Techniques

  • Blower Door Test

  • In an energy-efficient renovation heat losses through unintentional air changes must be minimised by ensuring an air tight building envelope

  • In a blower door test, the dwelling is pressurised to

  • 50 Pa (0.0005 of normal atmospheric pressure) and corresponding air flow is measured. The leakier the building, the higher the air flow.

  • The air flow is related to the size of the building and expressed as infiltration rate n50 (the subscript 50 denotes at 50 Pa). So an n50 of 1 per hour means that each hour an amount of air is moving through the dwelling equal to the volume of the dwelling (at 50 Pa overpressure).

  • Under normal circumstances the pressure difference between indoor and outdoor is less than 50Pa. As a guideline, the air exchange rate (from wind pressure etc.) equals n50/20.

  • The German Passive House standard requires an n50 of 0.6 per hour or less.

  • Good practice in renovation is an n50 of 2.0 per hour or less.

Blower door used in air tightness testing of a renovated buidling.

DST home page

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

Continuous air tight layer (in red)

Throughout building structure.

D5 Securing air tightness

in buildings. To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

D8.1Monitoring Programme in

Demohouse renovation buildings.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Demohouse Renovations

Lessons learned


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  • Construction Quality Control Techniques

  • Blower Door Test

  • D5 Securing air tightness in buildings (Executive Summary) report provides instructions for carrying out an air tightness tests and recommendations on milestones for undertaking tests in renovation projects. Results are also presented of all Demohouse renovation projects air tightness measures implemented and Blower Door Tests.

Blower door used in air tightness testing of a renovated buidling.

DST home page

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

Continuous air tight layer (in red)

Throughout building structure.

D5 Securing air tightness

in buildings. To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

D8.1Monitoring Programme in

Demohouse renovation buildings.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Demohouse Renovations

Lessons learned


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Energy Signature in the course of the renovation proved very useful to correct failures in achieving the air-tightness required.

  • Is a procedure to document the overall energy use for space and water heating.

  • The procedure entails plotting the weekly (or monthly energy consumption per m2 of floor area versus the average ambient temperature in that period (week or month).

  • The lower the ambient temperature, the higher the energy consumption for space heating. The slope of the line is an indication of the thermal quality of the building (the lower the slope, the better)

  • In summertime (average ambient temperature 15°C or more), there should be no energy demand for space heating. Remaining energy demand is for DHW and should be around 10 kWh/m2. Higher values indicate there could be something not working well in the heating system.

DST home page

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

Example of Energy Signature use.

To see the example select:

http://www.demohouse.net/reports/monitoring/other/

Demohouse Renovations

Lessons learned


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Common Evaluation Protocol in the course of the renovation proved very useful to correct failures in achieving the air-tightness required.

  • Is to be used as basis for evaluation of housing projects in terms of improvement of sustainability, energy and socio-economic aspects.

  • The format of the evaluation protocol includes 3 parts:

  • 1. The documentation part.

  • 2. The evaluation part.

  • The evaluation is split into:

  • - Pre-renovation evaluation carried out before the start of the renovation works.

  • - Evaluation during the renovation process.

  • Post-renovation evaluation, in short post-renovation carried out after the end of the renovation works.

  • 3. The comparison part of the results of the pre and post evaluation

DST home page

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

D23 Applicability of the Common Evaluation Protocol.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Demohouse Renovations

Lessons learned


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DEMOHOUSE Renovation Projects in the course of the renovation proved very useful to correct failures in achieving the air-tightness required.

Buildings renovated under sustainable criteria and ‘Lessons learned’ from renovations.

DST home page

Danish Demohouse

Austrian Demohouse

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

DEMOHOUSE brochure.

To see the brochure select:

http://www.demohouse.net/reports/monitoring/other/

D1CBarriers for sustainable and energy conscious renovation.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Greek Demohouse

Spanish Demohouse

Paper: ”Energy efficient renovation of dwellings: lessons learned”.

To see the paper select:

http://www.demohouse.net/reports/monitoring/other/

Demohouse Renovations

Lessons learned

Hungarian Demohouse


Slide33 l.jpg

  • Austrian Demohouse Building in the course of the renovation proved very useful to correct failures in achieving the air-tightness required.

  • Results of the renovation project:

  • Lessons learned_Austrian renovation project

  • What went well

  • What did not go well

  • Lessons learned

  • Monitoring

Before renovation

After renovation

DST home page

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

DEMOHOUSE brochure.

To see the brochure select:

http://www.demohouse.net/reports/monitoring/other/

Demohouse Renovations

Lessons learned


Slide34 l.jpg

Danish Demohouse in the course of the renovation proved very useful to correct failures in achieving the air-tightness required.

Ecovent heat

recovery unit

Rooftop Apartment

DST home page

  • Results of the renovation project:

  • Lessons learned_Danish renovation project

  • What went well

  • What did not go well

  • Lessons learned

  • Monitoring

Technical aspect

Financial aspect

Social aspect

Before renovation

After renovation

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

DEMOHOUSE brochure.

To see the brochure select:

http://www.demohouse.net/reports/monitoring/other/

Demohouse Renovations

Lessons learned


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Greek Demohouse in the course of the renovation proved very useful to correct failures in achieving the air-tightness required.

During construction

DST home page

Technical aspect

Financial aspect

Social aspect

  • Results of the renovation project:

  • Lessons learned_Greek (newbuilt) project

  • What went well

  • What did not go well

  • Lessons learned

  • Monitoring

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

DEMOHOUSE brochure.

To see the brochure select:

http://www.demohouse.net/reports/monitoring/other/

Demohouse Renovations

Lessons learned


Slide36 l.jpg

Hungarian Demohouse in the course of the renovation proved very useful to correct failures in achieving the air-tightness required.

Before renovation

Proposed

DST home page

Technical aspect

Financial aspect

Social aspect

  • Results of the renovation project:

  • Lessons learned_Hungarian renovation project

  • What went well

  • What did not go well

  • Lessons learned

  • Monitoring

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

DEMOHOUSE brochure.

To see the brochure select:

http://www.demohouse.net/reports/monitoring/other/

Demohouse Renovations

Lessons learned


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PV roof system in the course of the renovation proved very useful to correct failures in achieving the air-tightness required.

Spanish Demohouse

DST home page

Technical aspect

Financial aspect

Social aspect

Before

After renovation

  • Results of the renovation project:

  • Lessons learned_Spanish renovation project

  • What went well

  • What did not go well

  • Lessons learned

  • Monitoring

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

DEMOHOUSE brochure.

To see the brochure select:

http://www.demohouse.net/reports/monitoring/other/

Demohouse Renovations

Lessons learned


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Monitoring of Demohouse Renovation Projects in the course of the renovation proved very useful to correct failures in achieving the air-tightness required.

Information will be available in late 2008.

DST home page

Technical aspect

Financial aspect

Social aspect

Best Available Technologies

Low-cost Technical Solutions

Green Questionnaire

IR Camera Test

Blower Door Test

Energy Signature

Common Evaluation Protocol

Demohouse Renovations

Lessons learned


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  • Financial aspect in the course of the renovation proved very useful to correct failures in achieving the air-tightness required.

  • One of the main barriers of energy efficient renovation is the extra investment required, compared to a ‘standard’ or ‘business as usual’ renovation.

  • Several options exist to (help) overcome the financial barrier.

  • Novel financial models: ESCO Energy Service Company

  • ESCO can be initiated to do engineering, finance and even do the maintenance and financial administration of renovated buildings.

  • By outsourcing energy efficient installations, the housing association need lower investment and have lower financial risk.

  • The energy service companies have the funds to invest in solar roofs, windmills, bio-fuel plants, heat storage in buffer tanks etc.

The savings payback periods in all Demohouse renovation projects payback times ranges from 15 to 35 years, although most common figures are around 25 years.

DST home page

Technical aspect

Financial aspect

Social aspect

D9 Life Cycle Optimisation

and CO2 Reduction.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

D13 New management strategies.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Demohouse Renovations

Lessons learned


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  • Financial aspect in the course of the renovation proved very useful to correct failures in achieving the air-tightness required.

  • One of the main barriers of energy efficient renovation is the extra investment required, compared to a ‘standard’ or ‘business as usual’ renovation.

  • Several options exist to (help) overcome the financial barrier.

  • Novel financial models:

  • ESCO, Energy Service Company

  • vs

  • EPC, Energy Performance Contracting

  • An ESCO, Energy Service Company is a firm typically hired by a building owner wanting to improve building's energy performance and/or decrease its running energy costs.

  • The ESCO is the organisation that realises the energy savings in the project.

  • The ESCO and the building owner sign a contract (usually 5-10 years).

  • EPC, Energy Performcance Contracting is an activity, or in general, a concept.

  • With the EPC, in the contract (energy conservation) it is set the performance that the ESCO has to achieve each year. Hence the name energy performance contracting.

DST home page

Technical aspect

Financial aspect

Social aspect

D9 Life Cycle Optimisation

and CO2 Reduction.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

D13 New management strategies.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Demohouse Renovations

Lessons learned


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  • Financial aspect in the course of the renovation proved very useful to correct failures in achieving the air-tightness required.

  • One of the main barriers of energy efficient renovation is the extra investment required, compared to a ‘standard’ or ‘business as usual’ renovation.

  • Several options exist to (help) overcome the financial barrier.

  • Novel financial models:

  • Roof top apartment

  • Sale of such apartments at a good price (good views) can (partly) cover extra investments for energy efficient renovation.

  • Prefabricated components produced with high quality and reduced cost. Advantages: well insulated, air-tight prefabrication. Low overall weight (placed on existing roof of a concrete housing block).

DST home page

Technical aspect

Financial aspect

Social aspect

Roof top apartment demonstration.

Danish Demohouse.

D9 Life Cycle Optimisation

and CO2 Reduction.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

D13 New management strategies.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Demohouse Renovations

Lessons learned


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Financial aspect in the course of the renovation proved very useful to correct failures in achieving the air-tightness required.

One of the main barriers of energy efficient renovation is the extra investment required, compared to a ‘standard’ or ‘business as usual’ renovation.

Several options exist to (help) overcome the financial barrier.

Novel financial models:

Low cost components, e.g. HRV-unit

DST home page

HRV-unit more information

Technical aspect

Financial aspect

Social aspect

D9 Life Cycle Optimisation

and CO2 Reduction.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

D13 New management strategies.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Demohouse Renovations

Lessons learned

Three parts for low-cost HRV unit.


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  • Financial aspect in the course of the renovation proved very useful to correct failures in achieving the air-tightness required.

  • Life cycle optimisation and CO2 reduction

  • Each Demohouse renovation project is analysed with regards to the energy and CO2 emission saving potential and the costs of implementing renovation measures.

  • Pay back times for renovation investments are calculated and compared to pay back times in typical renovations.

  • Optimal renovation measures are identified.

DST home page

Technical aspect

Financial aspect

Social aspect

D9 Life Cycle Optimisation

and CO2 Reduction.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

D13 New management strategies.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Demohouse Renovations

Lessons learned


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  • Social aspect in the course of the renovation proved very useful to correct failures in achieving the air-tightness required.

  • Advantages of occupants involvement:

  • - Experience shows that tenants will be more willing to cooperate and be happier with the result if they can participate in the renovation process. This makes decision making harder, but the result is more rewarding to all.

  • The sustainable renovation has a social impact on neighborhood level so check if there are funds available in your country for reviving the neighborhood.

  • Tenants participation from early stages of renovation improves the renovation process

  • Benefits of providing building users with information on proper energy-efficient house use and maintenance

  • Indicators and questionnaires have been developed for Demohouse projects to measure socio-economic qualities:

  • - Changes resulting from the renovation regarding the

  • number of dwellings and their characteristics

  • - The rent level and affordability

  • - Energy cost

  • - The housing situation and the financial aspects of the

  • renovation.

DST home page

Technical aspect

Financial aspect

Social aspect

D14

Assessment of environmental, economical and social impacts involving the whole life cycle.

To see the report select:

http://www.demohouse.net/reports/monitoring/reports/

Demohouse Renovations

Lessons learned


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