Enerco HST45 owner manual Typical Installation, Venting, Canadian Installations1 US Installations2

Typical Installation

The Illustration below shows a typical installation of the MHT / HST tube heater. The installation drawing shown has a straight horizontal venting arrangement and specifies the minimum space required for maintenance, as well as the allowable range of distances between the two suspension points.

Detailed venting arrangements are illustrated in following portions

of this section.	Minimum
	Recommended		6" Min
	for servicing		X
24"	15"	1" Max.	Suspension
			Points

Vent terminal	Burner Box	Reflector
Exterior Wall
	Outside wall thickness -
	10" max. 1/2" min.	Minimum Mounting
		Height- 7 feet*

X Dimension

Model Min. Max.

MHT-45 102" 114"

HST- 45 102" 114"

(*)For minimum mounting height in aircraft hangars and public garages.

Section 4 VENTING

This appliance is certified under the ANS/CSA Standard for Vented Gas-Fired Space Heating Appliances. In accordance with these standards all sidewall venting must conform to the supplied diagram for Vent Terminal Clearances, which are stated for both U.S. and Canadian installations. These clearances should be compared to but not less than those specified in the current ANSI Z223.1/NFPA 54, National Fuel Gas Code, or CSA B149.1, Natural Gas and Propane Installation Code. Clearances not covered in the table or above listed codes must comply with local installation codes and the requirements of your local gas supplier.

		Canadian Installations1		US Installations2
A=	Clearance above grade,	12 inches (30 cm)	12 inches (30 cm)
	veranda, porch, deck or
	balcony
B=	Clearance to window or door	6 inches (15 cm) for appliances <	6 inches (15 cm) for appliances <
	that may be opened	10,000 Btuh (3 kW), 12 inches (30	10,000 Btuh (3 kW), 9 inches (23
		cm) for appliances > 10,000 Btuh	cm) for appliances > 10,000 Btuh
		(3 kW) and < 100,000 Btuh (30	(3 kW) and < 50,000 Btuh (15
		kW), 36 inches (91 cm) for	kW), 12 inches (30 cm) for
		appliances > 100,000 Btuh (30 kW)	appliances > 50,000 Btuh (15 kW)
C=	Clearance to permanently	*	*
	closed window
D=	Vertical clearance to ventilated	*	*
	soffit 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	*	*
H=	Clearance to each side of	3 feet (91 cm) within a height 15
	center line extended above	feet (4.5 m) above the	*
	meter/regulator assembly	meter/regulator assembly
I=	Clearance to service regulator	3 feet (91 cm)	*
	vent outlet
J=	Clearance to nonmechanical air	6 inches (15 cm) for appliances <	6 inches (15 cm) for appliances <
	supply inlet to building or the	10,000 Btuh (3 kW), 12 inches (30	10,000 Btuh (3 kW), 9 inches (23 cm)
	combustion air inlet to any	cm) for appliances > 10,000 Btuh (3	for appliances > 10,000 Btuh (3 kW)
	other appliance	kW) and < 100,000 Btuh (30 kW),	and < 50,000 Btuh (15 kW), 12
		36 inches (91 cm) for appliances	inches (30 cm) for appliances >
		> 100,000 Btuh (30 kW)	50,000 Btuh (15 kW)
K=	Clearance to a mechanical air	6 feet (1.83 m)	3 feet (91 cm) above if within 10 feet
	supply inlet		(3 m) horizontally
L=	Clearance above paved	7 feet (2.13 m) +	*
	sidewalk or paved driveway
	located on public property
M=	Clearance under veranda,	12 inches (30 cm) ++	*
	porch deck, or balcony

1In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code.

2 In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code.

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

++ Permitted 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, one of the following shall be indicated:

a)A minimum clearance value determined by testing in accordance with section 2.19.6, or;

b)A reference to the following footnote:

“Clearance in accordance with local installation codes and the requirements of the gas supplier.”

Enerco Group, Inc., Gas-Fired Low-Intensity Infrared Heater 12 Operating Instructions and Owner’s Manual