Rinnai EX22C, EX17C installation manual Description Canadian Installations US Installations

Flue Terminal Clearances

Ref	Description	Canadian Installations	US Installations
	Clearance above grade, veranda,
A	porch, deck, or balcony. (Take into	12 inches (30 cm)	12 inches (30 cm)
	account the anticipated snow line)
		6 inches (15 cm) for	6 inches (15 cm) for
		appliances < 10,000 BTUh;	appliances < 10,000 BTUh;
B	Clearance to window or door that may	12 inches (30 cm) for	9 inches (23 cm) for
		appliances > 10,000 BTUh	appliances > 10,000 BTUh
	be opened
		and < 100,000 BTUh,	and < 50,000 BTUh,
		36 inches (91 cm) for	12 inches (30 cm) for
		appliances > 100,000 BTUh	appliances > 50,000 BTUh
C	Clearance to permanently closed	*	*
	window
	Vertical clearance to ventilated soffit,
D	located above the terminal within a	*	*
	horizontal distance of 2 feet (61 cm)
	from the center line of the terminal
E	Clearance to unventilated soffit	*	*
F	Clearance to outside corner	*	*
G	Clearance to inside corner	20 inches (50 cm)	20 inches (50 cm)
	Clearance to each side of center line	3 feet (91 cm) within a height
H	extended above meter/regulator	15 feet (4.5 m) above the	*
	assembly	meter/regulator assembly
I	Clearance to service regulator vent	3 feet (91 cm)	*
	outlet
		6 inches (15 cm) for	6 inches (15 cm) for
		appliances < 10,000 BTUh;	appliances < 10,000 BTUh;
	Clearance to nonmechanical air supply	12 inches (30 cm) for	9 inches (23 cm) for
J	inlet to building or the combustion air	appliances > 10,000 BTUh	appliances > 10,000 BTUh
	inlet to any other appliance	and < 100,000 BTUh,	and < 50,000 BTUh,
		36 inches (91 cm) for	12 inches (30 cm) for
		appliances > 100,000 BTUh	appliances > 50,000 BTUh
K	Clearance to a mechanical air supply	6 feet (1.83 m)	3 feet (91 cm) above if within
	inlet		10 feet (3 m) horizontally
	Clearance above paved sidewalk or
L	paved driveway located on public	7 feet (2.13 m) 1	*
	property
		12 inches (30 cm) to non-	12 inches (30 cm) to non-
M	Clearance under veranda, porch, deck,	flammables 2	flammables 2
	or balcony	24 inches (60 cm) to	24 inches (60 cm) to
		flammables 2	flammables 2

1A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.

2Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor. ∗For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, clearances are in accordance with local

installation codes and the requirements of the gas supplier.

Rinnai Corporation EX17C / EX22C Manual 19