This is the first in a series of articles intended to provide a working knowledge of residential heating-cooling duct systems; an understanding of the major issues concerning efficiency, comfort, ...

Have you ever been scared to add outside air to a residential system’s return air duct for ventilation purposes? If you’re like me, I worried the outside air would affect the return temperature too ...

Rooms that feel stuffy, stale, or hard to cool often lead you to blame the thermostat, the age of the equipment, or even the weather. In a surprising number of homes, though, the real culprit is a ...

When the combustion air duct is connected directly to the return plenum for a furnace, the blower fan on the furnace pulls outdoor air in to the return plenum. To supply this air to the furnace room, ...

One of the most cost-effective and energy-conserving measures you can take is to insulate duct or pipe runs in the unheated areas of your home. By not insulating these conduits, you are essentially ...