Thermo Products PHCFA072DV4R Maximum Model Number Filter Type Air Velocity, Ohc, Ft/min

Now the filter rack can be anchored to the furnace with screws or pop-rivets through the securing flange of the filter rack.

Connect the return air plenum to the filter rack and slide the filter into place. Dimensions for adapting the return air plenum to the filter rack are provided (See Fig. 6).

Note: Filter rack and condensate drain must be on separate sides of the furnace.

Fig-6 A typical filter rack and dimensions for the OHC furnace.

: Failure to comply with minimum filter installation requirements may affect the performance and/or void the warranty on this unit.

If a method other than Thermo Pride filter racks is selected for retention of the filter and/or use of a different filter type is desired, refer to Table 2 below for minimum sizing guidelines for selecting filter for the unit.

	Maximum	Model Number
Filter Type	Air Velocity	OHC*
	(ft/min)
*Thermo Products		384 in2
Supplied	600
Permanent
Standard	500	461 in2
Permanent
Disposable	300	768 in2

Table 2: Minimum Required Filter Area (in square inches)

*The Thermo Products supplied filter can be cut to size to fit other filter retention systems as long as the minimum size requirement is met.

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