Any part of the building shell that offers resistance to air leakage between indoors and outdoors. Air barriers can be composed of many combinations of materials including properly installed drywall, [..]

The total building air exchanged with the out-doors through air leakage and intentional ventilation.

A weatherization

A water-based heating system, which circulates hot water or steam through a pipe system.

Air that combines with fuel in the combustion process. Refers also to the supply of outdoor air that supports this process.

Data pertaining to primary and secondary heating and non-heating electric costs. Also, units, such as gallons of oil or kilowatt-hours (kWh), used by a household or dwelling for a specified period of [..]

A device located in the flue of gas appliances to moderate draft and direct backdrafts away from an appliance.

The process where a trained staff person assesses and documents the energy conservation needs of a dwelling, including furnace safety and efficiency testing, and all cost effective weatherization meas [..]

The amount of heat that escapes through the building shell during a measured period of time.

Water vapor that is absorbed in the air.