SELECTION
PROCESS:
Step 1: Measure Room:
Length_______ x Width_______ x Ceiling Height_______ =_______Cubic
Ft.
Step 2: Determine Insulation Factor (1), (2), or (3). (See below)
Step 3: Select Temperature Zone from map below.
Step 4: Multiply:
(Temperature Zone/Insulation Factor Digit) ___
x (Total Cubic Ft.) _______ =
_______ Btu Input Required
INSULATION
FACTORS:
1) Insulation in ceiling and walls with storm doors and windows.
2) Insulation in ceiling, none in walls, with weather stripping.
3) Little or no insulation in ceilings or walls, unusual exposure, large glass
areas.
| Temperature Zones |
-40°F |
-30°F |
-20°F |
-10°F |
0°F |
10°F |
20°F |
30°F |
| Maximum Insulation Factor
(1) |
11 |
10 |
9 |
8 |
7 |
6 |
5 |
4 |
| Average Insulation Factor
(2) |
18 |
16 |
14 |
12 |
10 1/2 |
9 |
7 1/2 |
6 |
| Poor Insulation Factor
(3) |
24 |
21 |
19 |
17 |
15 |
13 |
11 |
9 |
THE
ABOVE GUIDELINES ARE FOR VENTED PRODUCTS ONLY
(NOT FOR VENT-FREE UNITS).TEMPERATURE ZONES
Temperature
Zones
|
