Filter Performance, Recommended Filter Sizes

FILTER PERFORMANCE

The airflow capacity data published in the “Blower Perfor- mance” table listed above represents blower performance WITHOUT filters. To determine the approximate blower per- formance of the system, apply the filter drop value for the fil- ter being used or select an appropriate value from the “Filter Performance” table shown below.

NOTE: The filter pressure drop values in the “Filter Perfor- mance” table shown below are typical values for the type of filter listed and should only be used as a guideline. Actual pressure drop ratings for each filter type vary between filter manufacturer.

FILTER PERFORMANCE - PRESSURE DROP INCHES W.C.

277805-YTG-A-1106

RECOMMENDED FILTER SIZES

Nominal CFM	Cabinet Size	Side Return Filter in.	Bottom Return
			Filter in. (cm)
1200	A	16 x 25	14 x 25
1200	B	16 x 25	16 x 25
1600	C	16 x 25	20 x 25
2000	C	16 x 25	20 x 25
2000	D	(2) 16 x 25	22 x 25

NOTES:

1.Air velocity through throwaway type filters may not exceed 300 feet per minute. All velocities over this require the use of high velocity filters.

2.Air flows above 1800 CFM require either return from two sides or one side plus bottom.

	Minimum Opening Size				Filter Type
Airflow Range	Minimum Opening Size		Disposable		WASHABLE FIBER		Pleated
Airflow Range			Disposable		WASHABLE FIBER		Pleated
	1 Opening	2 Openings	1 Opening	2 Opening	1 Opening	2 Opening	1 Opening	2 Opening
	Sq. in.	Sq. in.	In w.c.	In w.c.	In w.c.	In w.c.	In w.c.	In w.c.
0 - 750	230		0.01		0.01		0.15
751 - 1000	330		0.04		0.03		0.20
1001 - 1250	330		0.08		0.07		0.20
1251 - 1500	330		0.08		0.07		0.25
1501 - 1750	380	658	0.14	0.08	0.13	0.06	0.30	0.17
1751 - 2000	380	658	0.17	0.09	0.15	0.07	0.30	0.17
2001 & Above	463	658	0.17	0.09	0.15	0.07	0.30	0.17

UNIT CLEARANCES TO COMBUSTIBLES

Application	Top	Front	Rear	Left Side	Right Side	Flue	Floor/	Closet	Attic
Application	In.	In.	In.	In.	In.	In.	Bottom	Alcove	Attic
	In.	In.	In.	In.	In.	In.	Bottom	Alcove

Upflow	1	3	0	0	0	0	Combustible	Yes	Yes

Johnson Controls Unitary Products

GY9S-UP specifications

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