Instruction Manual

HOW TO SELECT AND SPECIFY IN THREE EASY STEPS
Selecting the heater for your application can be done in three easy steps:
1- Determine heater capacity, voltage and electrical components
2- Determine duct dimensions, air requirements and mechanical options
3- Determine method of control, then select control components
STEP 1 -
DETERMINE HEATER CAP
ACITY, VOLT
AGE AND ELECTRICAL COMPONENTS
Heater capacity
Given CFM (v
olume of air in cubic feet per minute) and
D ºT (temperature r
ise in º F ),
the KW capacity can be determined from the f
ormulas:
NOTE:
The above formulas are for standard air. Consult your Thermolec representative for non-standard air
conditions.
* Maximum air temperature rise for which the heater is designed
** This formula is for quick calculation and contains a loss allowance of 5%.
THREE
EASY
STEPS
KW** =
CFM x Temperature Rise, ºF*
3000
Temperatur
e Rise, ºF =
KW x 3000
CFM