How to select and specify in three easy steps, Three easy steps – Thermolec Application &Technical Notes User Manual
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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 CAPACITY, VOLTAGE AND ELECTRICAL COMPONENTS
Heater capacity
Given CFM (volume of air in cubic feet per minute) and
D
ºT (temperature rise in º F ),
the KW capacity can be determined from the formulas:
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
Temperature Rise, ºF =
KW x 3000
CFM