Air barrierAny boundary that air cannot pass through.
Air handlerIn a forced air heating system this is the "box" containing the fan that circulates the air.
Conditioned SpaceThe interior space of a building that is heated or cooled.
ReturnYour return is the profit or loss you have on your investments, including income and change in value.
SupplyThe availability of services or goods at centers. An example of a type of supply is the availability of milk at grocery stores, cars at a car dealer, or…