Heating Systems - Page 15

Heating Systems

Duct Furnace Air Resistance

Standard Duct Furnace

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Note: Standard Low CFM furnaces used with single bank "A" units having higher than 40° temperature rise.

Type "H" High CFM Duct Furnace

igas15b.gif (29593 bytes)

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

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igas15d.gif (28083 bytes)

Fresh Air Shut-off or Mixing Damper

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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)

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