APPLICATION This type of heater is used where forced hot air is required through smaller ducts of ovens, dryers, hot air blast, space heat-ing etc. Primary Room Heating (Central or Zone) Supplemental Room Heating (Heat Pumps) Air Tempering (Outside Air) Preheating (Make-Up Air) Reheating (Overcooling applications) Industrial and Commercial Buildings CONSTRUCTION Pairs of tubular (with - w/o finns) heaters are mounted in a chamber with easy to replace facility. Complete with terminal cover on the top or side isolated from the heating zone