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Energy Efficient Building Design & Indoor Air Quality. Principles of Energy Efficient House Design. Insulation Windows Draughtproofing Orientation Zoning Thermal Mass Cross Ventilation. Landscaping Efficient heating system Efficient hot water system Efficient lighting and appliances.

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Energy Efficient Building Design & Indoor Air Quality


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Presentation Transcript
principles of energy efficient house design
Principles of Energy Efficient House Design
  • Insulation
  • Windows
  • Draughtproofing
  • Orientation
  • Zoning
  • Thermal Mass
  • Cross Ventilation
  • Landscaping
  • Efficient heating system
  • Efficient hot water system
  • Efficient lighting and appliances
air leakage
Air Leakage
  • Factors which determine rate of air leakage are:
    • Temperature difference in and out.
    • Wind/Exposure
    • Exhaust Fans
    • Combustion appliances – wood heaters
    • Type and Style of building
      • Weatherboard leaker than brick veneer on concrete slab
      • Two storey leaker than single storey
      • Atriums
why ventilate
Why Ventilate?
  • To assist in cooling a space
  • Occupant Health
    • to improve indoor air quality (refresh space)
    • to control excess humidity
main sources of pollution inside a house
Main Sources of Pollution Inside a House
  • Mould and spores
  • Mites and their debris
  • Dust
  • Cooking and grease smoke emissions
  • Pet dander and debris
  • Smoke from fireplaces and wood-burning stoves
  • Occupant skin dander
  • Viruses and bacteria
  • Fumes from various chemical and cleaning products
  • Cigarette smoke
residential air leakage rates
Residential Air Leakage Rates
  • Older homes as much as 3.0 achnat
  • Average home in Victoria – 1.49 air changes per hour natural (achnat) (SEAV 1991)
  • Below 1.0 achnat moving toward energy efficiency.
  • Highly energy efficient home – 0.5 to 0.25 achnat.
  • North American code (ASHRAE) 0.35 achnat
jg king homes miner s rest 6 star plus display house
JG King HomesMiner’s Rest 6 Star Plus Display House
  • Blower Door Pressure-testing conducted by Air Barrier Technologies (23 January 2008)
  • Result – 0.22 air changes per hour natural
  • Tightest Australian residential building tested to date.
new uk building regulations introduced april 2006 to meet climate change targets
New UK Building Regulations introduced April 2006 (to meet Climate Change targets)

“Build Tight – Ventilate Right”

indoor air quality
Indoor Air Quality
  • Issues to deal with as homes become ‘tighter’
    • Poor air quality – stuffiness, odours, increase in dustmite, mould.
    • Poor combustion in gas appliances, wood heaters
    • Poor performance from exhaust systems
venmar whole home heat recovery ventilation air filtration system
Venmar Whole-Home Heat Recovery Ventilation & Air Filtration System
  • Complements Highly Energy Efficient Buildings
  • Reduces building air leakage through a balanced supply and exhaust of air.
  • Transfer of up to 80% of heat energy
  • Protect occupant health (maintain good indoor air quality)
  • Heat-Shifting capability
useful websites
Useful Websites
  • www.sustainability.vic.gov.au
  • www.buildingcommission.com.au
  • www.greenhouse.gov.au/energyefficiency/building/code.html
  • www.fwprdc.org.au(5 Star rating for timber-floored dwellings)
  • www.gbcaus.com(Commercial GreenStar Rating)
  • www.healthyhouse.com(Healthy Building consultants)
  • www.air2energy.com.au(HRV/ERV technology)
  • www.forbo.com.au(non-toxic floor covering)
  • www.hotbeam.com.au(LED lighting)
  • www.anrofloorcare.com.au(non-toxic paints/finishes)
venmar heat recovery ventilator1
Venmar Heat Recovery Ventilator
  • Provides ‘fresh air’ to all areas of your home
  • Removes pollutants & moisturefrom kitchen, bathrooms and laundry
  • filters incoming air
  • Shift temperature around building
  • Overcomes negative pressure problems
  • Recovers Energy (up to 80%)
why utilise heat energy recovery ventilation
Why utilise Heat/Energy Recovery Ventilation
  • manage indoor air quality
  • 5 Star Energy Efficient Home
  • To maintain energy efficiency of building envelope
  • Heavy weather sites – coastal, elevated.
  • Inner city locations – noise, security, outdoor air pollution