Sustainable energy conservations strategies that could be used in the bank branch
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Sustainable energy conservations strategies that could be used in the bank branch: Smart ventilation – to reduce HVAC (transitional seasons) Overhangs – to reduce cooling load (cooling season) Daylighting – to reduce electricity use (all year)

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Sustainable energy conservations strategies that could be used in the bank branch:

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Sustainable energy conservations strategies that could be used in the bank branch l.jpg

Sustainable energy conservations strategies that could be used in the bank branch:

  • Smart ventilation – to reduce HVAC (transitional seasons)

  • Overhangs – to reduce cooling load (cooling season)

  • Daylighting – to reduce electricity use (all year)

  • High performance windows – to reduce HVAC (all year)

  • Passive heating – to reduce heat load (heating season)


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Sustainable energy conservations strategies that could be used in the bank branch:

  • Photovoltaic energy production and solar hot water (all year – made attractive by new tax incentives)

  • High reflectivity, high emissivity roof – to reduce cooling load (cooling season).


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DOE Energy-Star Building Designation

  • Leed’s certification is too expensive.

  • US Dept. of Energy now has a designation for buildings that meet energy conservation criteria.

    • Less burdensome than Leed’s

  • See: http://www.energystar.gov/index.cfm?c=small_business.sb_index


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New (Jan 2006) tax incentives for energy conserving technologies:

  • $1.80/sq ft for commercial buildings that are constructed to save at least 50% of the heating, cooling, water heating, and interior lighting energy cost of a building that meets ASHRAE Standard 90.1-2001.

  • Solar Energy Systems - The tax credits are for 30% of the cost of the system (PV & hot water).

  • http://www.energytaxincentives.org/tiap-solar-energy-systems.html

  • http://www.energytaxincentives.org/tiap-commercial-bldgs.html


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Technologies: White Roofs

  • Maximize reflection and radiation heat loss.

  • Reduce cooling load, energy use, and equipment sizing

  • Longer life span

  • Options: PVC – TPO – EPDM – Spray


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Technologies: Daylighting

  • Features:

  • Many options available

  • Drive light deep into the room

  • Unobtrusive

  • Inexpensive

Photo Credits: University of Oregon, Design Share, Inc., University of Florida Center for Construction and Environment, National

Renewable Energy Laboratory web sites


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Six Keys to Daylight design:

  • Prevent direct sunlight penetration

  • Provide gentle uniform light

  • Avoid glare

  • Control

  • Electric lights work with the daylight

  • Plan the layout of interior spaces


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Daylight direction

Daylighting controls regulate electric light usage.

  • Continuous dimming

  • Stepped dimming


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Skylights and Solar Tubes

  • Specific applications

  • Gets light far into a building

  • Saves lighting energy


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Design options:

  • Roof Monitors

  • Clerestories

  • Lightshelves

  • Controls

  • Lightwell

  • Surface color

  • Visible Light Transmission


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Keeping light diffuse, minimizing direct heat gain,

and maximizing penetration are critical.


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Building cost of daylighting:

  • One example: Daylighting cost = $1.23/ft² (about half of building is daylit).

    • Includes roof monitors, light shelves, lighting controls, cloth baffles, etc.

  • Reductions in peak cooling load, electric lighting needs, and electric lighting energy cost more than offset cost of installation.


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Energy Savings

  • Reduction in annual lighting energy of daylit spaces: 70%

  • Reduction in annual cooling energy: 19%

  • Increase in annual heating energy due to reduced internal heat from lighting: 20%

  • (cooling load > heating load in our region)


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Paying for daylighting:

  • Construction cost: $1.23/ft²

  • Operation:

    • Annual lighting & cooling savings: $0.33/ft²

    • Annual heating cost increase: $0.04/ft²

    • Total annual energy savings: $0.29/ft²

  • Simple payback = 1.23/0.29 = 4.2 years


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Demand Reduction:

  • Little electrical lighting on clear days.

  • Intermittent on/off cycling on overcast days

  • Few complaints about cycling


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Online Resources

  • Available at www.daylightdividends.org

Smith Middle School

Harmony Library

Guide for Daylighting Schools

TomoTherapy, Inc.


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Non-Toxic and Environmentally Preferable Materials


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Types of Controls

  • Occupancy Sensors

  • Automatic on / Automatic off

  • Integration with HVAC


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Occupancy Sensors

  • Technologies:

  • Passive Infrared

  • Ultrasonic

  • Dual Technology


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Energy Analysis

  • Energy Analysis/Modeling Tools:

  • COMcheck™

  • DOE-2

  • Energy-10

  • EnergyPlus


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