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1. Total KW Needed
Approximate KW =
2. Number Of Steps Recommended
Rule of thumb for calculating the recommended number of
steps required. Use Step A or B below, whichever is higher.
A. Number of Steps =
(Based on approx. 10°F. temp. rise per step)
B. Number of Steps =
CFM x TD (F)
3000
300 x Total Heater KW
CFM
Total Heater KW
Maximum KW per step
Electric heaters are UL listed for duct installation. The UL
label applies to the heater only, not the complete air handler.
Heaters are furnished as a separate section and are available
with insulated or uninsulated casings. Controls such as
contactors, fuses, etc., may be factory installed and wired in
the heater section end panel provided the number of control
steps is not excessive.
Remote control panels are also available.
Y
Construction & Dimensions
Accessories- Electric Heat
Unit Heater Dimensions (In.)
Size H W
03 22 3/4 30 5/8
06 26 45 5/8
08 35 1/2 42 5/8
10 35 1/2 51 5/8
12 38 3/4 57 5/8
14 38 3/4 66 5/8
18 47 3/4 66 5/8
20 44 83 5/8
26 44 108 5/8
34 54 108 5/8
41 65 108 5/8
50 74 3/4 110 7/8
65 82 3/4 126 7/8
75 94 3/4 126 7/8
Notes: Heaters for constant volume units to have 35 W/in
2
of wire
surface maximum.