HP 422690 I manual Furnace Dimensions and Clearances

	GAS		MOTOR				FURNACE		RETURN AIR				SUPPLY AIR						CLEARANCE TO COMBUSTIBLES***										VENT SIZE
	INPUT*			SIZE*			WIDTH**				SIZE**				SIZE**							(INCHES)
	(Btu/hr)				(HP)			“A”				“B”				“C”		TOP			SIDES		BACK		FRONT		VENT			(INCHES)
54,000		1/3				17 1/2				15 3/4”				15 15/16”			1			0		0		2		0		2
72,000		1/2				17 1/2				15 3/4”				15 15/16”			1			0		0		2		0					2 OR 3
72,000		3/4				20 1/2				18 3/4”				18 15/16”			1			0		0		2		0					2 OR 3
90,000		1/2				17 1/2				15 3/4”				15 15/16”			1			0		0		2		0					2 OR 3
90,000		3/4				20 1/2				18 3/4”				18 15/16”			1			0		0		2		0					2 OR 3
108,000		3/4				23 1/2				21 3/4”				21 15/16”			1			0		0		2		0		3
126,000		3/4				23 1/2				21 3/4”				21 15/16”			1			0		0		2		0		3

*See Furnace Rating Plate located on blower door.

**These are furnace dimensions. See Sections 9 and 10 for proper ductwork and floor opening dimensions.

***Certified for installation on wood flooring. 30-inch front clearance required for service. 18-inch front clearance required in an alcove.

Figure 1. Furnace Dimensions and Clearances.

Page 4 Installer’s Information Manual