Glossary of Green Terms

Air Sealing

Restricts the passage of air through the walls, floor, or ceiling

Air Source Heat Pump

A system which transfers heat from outside to inside a building or from inside to outside a building

Annual Fuel Utilization Efficiency

Thermal efficiency measure of combustion equipment like furnaces, boilers, and water heaters

Duct Sealing

A duct system is used to distribute conditioned air throughout a house. A portion of the air moving through the duct system is lost due to leaks, holes, and/or poorly connected ducts.

Energy Efficiency Ratio (EER)

Ratio of the cooling capacity to the power input

HVAC

Heating, Ventilating, and Air Conditioning

R-Values

An insulating material’s resistance to conductive heat flow is measured in terms of its thermal resistance

The R-Value depends on the type of insulation

Seasonal Energy Efficiency Ratio (SEER)

The SEER rating of a unit is the cooling output during the typical cooling-season divided by the total electric energy input during the same period