warm-air furnace

warm-air furnace

A self-contained unit for heating air which is circulated through it; the air either is conveyed through ducts or is discharged directly into the space being heated.
References in periodicals archive ?
Do you also have a warm-air furnace, which is inefficient or unsafe to use -- and what is the fuel used?
278,000 had a warm-air furnace and 183,000 had a heat pump as the primary heating system.
have central heating, and six-out-of-10 have a warm-air furnace.
For warm-air furnace systems, check and replace dirty air filters.
have central heating, and nearly six-out-of-10 are equipped with a warm-air furnace.
Additionally, most units (89 percent) used a warm-air furnace for heating.
Additionally, most units (60 percent) used warm-air furnace for heating.
have central heating, and six-out-of-10 are equipped with a warm-air furnace.
About two-thirds (64 percent) of the units used a warm-air furnace for heating; 12 percent used an electric heat pump; and 11 percent used a steam or hot water system.
The manufacture of air conditioning and refrigeration equipment and of warm-air furnaces involves the production of heat transfer apparatus for residential, commercial, and industrial applications, as well as for hospitals, marine vessels, freight and passenger vehicles, and many specialized applications.
thus, the production of heat transfer equipment other than unitary or room air conditioners or warm-air furnaces increased at a rate nearly 10 times higher over the 1967-73 period than during the 1973-82 span.
Periodically clean or replace filters in warm-air furnaces.