Mr. Heater MHT 45 User Manual download pdf (Page 12)

Mr. Heater | Gas-Fired Low-Intensity Infrared Heater Operating Instructions and Owner’s Manual

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 * *

soft located above the

terminal within a horizontal

distance of 2 feet (61 cm) from

the center line of the terminal

E= Clearance to unventilated soft * *

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

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 oor.

* For clearances not specied 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.”

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 species 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.

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

garages.

X Dimension

Model Min. Max.

MHT-45 102" 114"

Minimum

Recommended

for servicing

24"

15"

Vent terminal

Exterior Wall

Outside wall thickness -

10" max. 1/2" min.

Burner Box

Reﬂector

Minimum Mounting

Height- 7 feet*

6" Min

1" Max.

Suspension

Points

Section 4 VENTING

This appliance is certied 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 specied 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.

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Mr. Heater MHT 45 User Manual Page 12

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