Bard FH085D36F Air Filters, Optional Filter Box FC Unit 19 1/4 70 5/16, screws, Frame, Door

AIR FILTERS

Only Lo-Boy models are shipped with air filters. Filter kits are available from your local distributor for Upflow and Counterflow models. Knockouts are provided in the sides of the FH series models to facilitate the cutting of the return openings.

The upflow filter kit part numbers are FR23 for a 16x25x1 filter size and FR24 for a 20x25x1 filter size. These filter kits come complete with the filter and all necessary brackets for installing on the furnace. Each comes with a washable aluminum mesh filter. When installing a five ton AC unit on the furnace, one FR24 or Two FR23 must be used due to the high airflow requirements. It is important to note that a minimum of one inch spacing is required between the filter and the unit side. Do not exceed 400 fpm for fiberglass (disposable) type filters and 575 fpm for washable type filters. See Figure 16.

The counterflow filter kit part number FR25 comes with two washable filters. If not installing the FR25 kit remember not to exceed 400 fpm for fiberglass (disposable) type filters and 575 for washable type filters. See Figure 17.

See Table 11 for filter sizes and quantities.

FIGURE 16

TYPICAL INSTALLATION OF FR26 AND

FR27 FILTER RACKS

TABLE 11

FILTER SIZES FOR OIL FURNACES

Model		Size
FH085D36F	(1)	16 x 25 x 1
Hi-Boy
FH110D48F	(1)	16 x 25 x 1
Hi-Boy
FH110D60F	(1)	20 x 25 x 1
Hi-Boy
FLF085D36F
FLR085D36F	(1)	16 x 20 x 2
Lo-Boys
FLF110D48F
FLR110D48F
FLF110D60F	(1)	20 x 20 x 2
FLR110D60F
Lo-Boys
FLR140D60F	(1)	20 x 25 x 2
Lo-Boy
FC085D36F	(2)	16 x 20 x 1
Counterflow

FIGURE 17

TYPICAL INSTALLATION OF FR25

FILTER KIT

Optional

Filter

Box

"FC" Unit

19 1/4"

70 5/16"

16"

	Filter
(2) screws	Frame
	Filter
Filter	MIS-1839 A
Door	MIS-1841

Manual	2100-422M
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