If you have a forced-air system, look first at the air filter.

A forced-air system is an efficient way to distribute warm or cool air to every room of your home.

Full nuclear-biological-chemical protection was provided through a forced-air filtering system.

The drawback of a forced-air system is that heat can be lost through the duct walls if they are not wrapped with insulation.

A good forced-air system should be designed to fit the house so the air flow is not obvious.

They provide more even, less fluctuating temperatures than forced-air systems.

Some houses are too big for a single forced-air system because of the length of the ducts, he said.

In contrast, the forced-air system relies on large diameter ducts to move the air around.

A forced-air system is one which uses air as its heat transfer medium.

When a forced-air system is out of balance, what may be the result?