The cost of installing a central air conditioning system varies widely depending on your home’s size, the type and efficiency of the unit, and whether ductwork is already in place. Some or all of the ...

Sitting in an office, or in their own homes, many people don’t notice their building’s ductwork unless there is something wrong with it — it’s too noisy or the air in the room is too cold or too hot.

There has been a lot of buzz in the past several years surrounding the whole-house approach to analyzing energy efficiency and matching the correct system and components with each building envelope.