Duct Furnace Air Resistance
Standard Duct Furnace
Note: Standard Low CFM furnaces used with
single bank "A" units having higher than 40° temperature rise.
Type "H" High CFM Duct Furnace
Note: High CFM type furnaces used with
double bank "B" units and single bank "A" units having 60° or
less temperature rise.
Accessory Equipment Air Resistance
Fresh Air Shut-off or Mixing Damper
 |
MB-112
Filters Used
(1) 16 x 25 x 2
(1) 20 x 25 x 2
*(6 FT2) |
 |
MB-114A
Filters Used
(4) 20 x 20 x 2
*(11 FT2) |
 |
MB-114B
Filters Used
(4) 20 x 25 x 2
*(13.5 FT2) |
 |
MB-214
Filters Used
(8) 16 x 20 x 2
*(17.5 FT2) |
 |
MB-218
Filters Used
(10) 16 x 25 x 2
(5) 20 x 25 x 2
*(45 FT2) |
* Approximate total filter area (FT2)
