Section 4 Venting - Mr. Heater MHT 45 Operating Instructions And Owner's Manual

Typical Installation
The Illustration below shows a typical installation of the MHT 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
for servicing
24"
Vent terminal
Exterior Wall
Outside wall thickness -
10" max. 1/2" min.
X Dimension
Model Min. Max.
MHT-45 102" 1 14"
(*) For minimum mounting height in aircraft hangars and public
garages.
A= Clearance above grade,
veranda, porch, deck or
balcony
B= Clearance to window or door
that may be opened
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
center line extended above
meter/regulator assembly
I= Clearance to service regulator
vent outlet
J= Clearance to nonmechanical air
supply inlet to building or the
combustion air inlet to any
other appliance
K= Clearance to a mechanical air
supply inlet
L= Clearance above paved
sidewalk or paved driveway
located on public property
M= Clearance under veranda,
porch deck, or balcony
1 In 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."
Mr. Heater | Gas-Fired Low-Intensity Infrared Heater
6" Min
X
Suspension
15" 1" Max.
Points
Reflector
Burner Box
Minimum Mounting
Height- 7 feet*
Canadian Installations1
12 inches (30 cm)
6 inches (15 cm) for appliances <
10,000 Btuh (3 kW), 12 inches (30
cm) for appliances > 10,000 Btuh
(3 kW) and < 100,000 Btuh (30
kW), 36 inches (91 cm) for
appliances > 100,000 Btuh (30 kW)
3 feet (91 cm) within a height 15
feet (4.5 m) above the
meter/regulator assembly
3 feet (91 cm)
6 inches (15 cm) for appliances <
10,000 Btuh (3 kW), 12 inches (30
cm) for appliances > 10,000 Btuh (3
kW) and < 100,000 Btuh (30 kW),
36 inches (91 cm) for appliances
> 100,000 Btuh (30 kW)
6 feet (1.83 m)
7 feet (2.13 m) +
12 inches (30 cm) ++

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.
*
*
*
*
*
12
Operating Instructions and Owner's Manual
US Installations2
12 inches (30 cm)
6 inches (15 cm) for appliances <
10,000 Btuh (3 kW), 9 inches (23
cm) for appliances > 10,000 Btuh
(3 kW) and < 50,000 Btuh (15
kW), 12 inches (30 cm) for
appliances > 50,000 Btuh (15 kW)
*
*
*
*
*
*
*
6 inches (15 cm) for appliances <
10,000 Btuh (3 kW), 9 inches (23 cm)
for appliances > 10,000 Btuh (3 kW)
and < 50,000 Btuh (15 kW), 12
inches (30 cm) for appliances >
50,000 Btuh (15 kW)
3 feet (91 cm) above if within 10 feet
(3 m) horizontally
*
*