Profile: American Clean Air & Heat specializes in providing heating services. We offer forced air units, central air systems, rooftop units, electric heaters, duct work, heaters & furnaces, thermostats & controls, air conditioning installation, air condition repairs, system relocation and heating repair services. A forced-air system is one which uses air as its heat transfer medium. These systems rely on ductwork, vents, and plenums as means of air distribution, separate from the actual heating and air conditioning systems. The return plenum carries the air from several large return grills (vents) to a central air handler for re-heating. The supply plenum directs air from the central unit to the rooms which the system is designed to heat.