Room

Appliance details

The maximum flue gas exhaust temperature on the GWH-635-ES is 437°F (225°C)

Venting	Exhaust	* Exhaust	* Exhaust	Combustion	Combustion	Vent pipe	Vent pipe
Options	vent	vent	vent	air pipe	air pipe	clearances	clearances
	diameter	maximum	minimum	diameter	maximum	within an	within an
	and	length	length	and material	length	unenclosed	enclosed
	material					space	space

Room	3 inch	26 feet (8	3 feet	3 inch PVC,	26 feet (8	** See vent	** See vent
sealed	stainless	m) with one		aluminum or	m) with one	manufacturer's	manufacturer's
(twin pipe)	steel	elbow. Less		galvanized	elbow. Less	specifications	specifications
	(AL29-4C)	2½ feet for		pipe	2½ feet for
	sealed vent	each			each
	pipe	additional			additional
		90° elbow			90° elbow
Open	3 inch	26 feet (8	3 feet	See	See	** See vent	** See vent
combustion	stainless	m) with one		chapter 2.8	chapter 2.8	manufacturer's	manufacturer's
(single	steel	elbow. Less				specifications	specifications
pipe)	(AL29-4C)	2½ feet for
	sealed vent	each
	pipe	additional
		90° elbow

Exhaust vent is always fan assisted. Installation of exhaust vent and combustion air piping may be run vertically or horizontally and in separate directions if required.

*A maximum of three 90 degree elbows are permitted in the total vent length. The total vent length must be reduced by 1 ¼ feet for every 45° elbow used in the vent system.

** Stainless steel (AL29-4C) vent pipe is manufacturerd by Z-Flex, Protech and Heat Fab. NOTE: clearance distances are variable depending if the vent pipe is installed in an enclosed or unenclosed space, the exhaust flue gas temperature and the orientation of the vent pipe.

Table 2

10	6 720 607 072

Options

(twin pipe)

pipe)