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Windows & Skylights
https://greenhome.osu.edu/windows-skylights-and-roofs
U-factor Rate at which a window or skylight conducts heat. It is generally expressed in units of Btu/hr-ft ... per minute per square foot of frame area (cfm/ft 2). A product with a low air leakage rating will be ... Solar gains. SHGC ranges between 0 and 1, with a higher rating admitting more radiative energy. ...
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Appliances
https://greenhome.osu.edu/energy-efficiency/appliances
an Electronic Products Environmental Assessment Tool (EPEAT) rating. Energy Star is the most widely ... Electronics Council, is a three tiered rating system which certifies computers as gold, silver, and bronze ... microwaves doesn’t vary as much as other appliances; thus they do not receive Energy Star ratings. The only ...
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Roofs
https://greenhome.osu.edu/passive-design/roofs
a roof cool. A composite rating system known as the solar reflectance index (SRI) considers both ...
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Energy Audit
https://greenhome.osu.edu/energy-efficiency/energy-audit
air pressure difference between the inside and outside to determine the air infiltration rate of the ... home. If the test shows large air infiltration rates, the professional will then will use a smoke pen to ...
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Heating, Ventilation, and Air Conditioning (HVAC)
https://greenhome.osu.edu/energy-efficiency/heating-ventilation-and-air-conditioning
efficiency ratings, types of heating fuels, and types of cooling systems HVAC System Components A typical ... ratings, the heating sources and cooling sources available in your area, and the advantages and ... disadvantages of each type of system. Energy Efficiency Ratings Systems There are several efficiency ratings ...
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Reduced Air Infiltration
https://greenhome.osu.edu/reduced-air-infiltration
a home's ACH, a home's air flow rate is measured in cubic feet per minute, per square foot of a home ... small openings in your house, and the air infiltration rate is measured in your home in units of cubic ... Building America's performance criteria, your home should have an air leakage rate of less than 0.25 ...
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Water Heating
https://greenhome.osu.edu/energy-efficiency/water-heating
R-Value indicates a lower heat loss from the hot water tank. First-hour rating (FHR) This is the amount of ... may demand in the morning hours, and the first-hour rating must exceed your family demand. Recovery ... around the heat pump to hot water tank. Heat pumps have the highest EF rating, which can also be ...
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Natural Ventilation
https://greenhome.osu.edu/natural-ventilation
typologies and controls different types of windows will result in different ventilation rates. External ...
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Geothermal
https://greenhome.osu.edu/renewables/geothermal
geothermal system types. Learn more about their rating system at Geothermal Heat Pumps Key Product Criteria ... efficiency requirements for ENERGY STAR® rated getoehrmal heat pumps. "Recommendations for Geothermal ...
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Insulation
https://greenhome.osu.edu/energy-efficiency/insulation
a rate of return on the investment. Resources "One Year in Foam House" by Gary Freeman- ...