B.Prepare to install the heater wall mounting bracket as follows:

1.If the wall mounting bracket is to be attached to a stud and wallboard wall, refer to Figure 3 for dimensions, locate a stud, and drill two 1/8" pilot holes into the stud centerline. Use template for simplified installation.

2.If the wall mounting bracket is to be attached to a brick or masonry wall, refer to Figure 3 for dimensions. Obtain two 1/4 inch (inside diameter)expansion anchors and determine the correct drill size to be used with them. Drill the appropriate size holes in the brick or ma- sonry to accept the anchors.

C.Place the wall mounting bracket on the wall and align the two through holes on the bracket with the pilot holes or anchors. Install 1/4 inch by 2-1/2 inch lag screws through the bracket into the stud or anchors. Tighten securely.

D.Locate heater mounting clip on back of heater and select the 1/4" – 20 by 3/4" hex head bolt and 1/4" -

20hex nut.

E.Position the heater as shown in Figure 3 and slide the heater mounting clip over the bracket and install

the bolt through the clip and bracket.

F.Thread the hex nut onto the bolt and tighten securely.

G.Ensure that the selected thermostat location meets all of the above requirements. Refer to the instructions that come with the thermostat for additional grounding information and mounting instruction.

H.If the wall is of stud and wallboard construction, then use the #6 by 1 inch sheet metal screws, included with the thermostat, and mount the thermostat in the selected location.

I.If wall is brick or masonry, the appropriate anchors must be obtained to accommodate thermostat mounting screws. Use the back plate of the thermostat as a template to mark the hole locations, drill appropriate size anchor holes, install the anchors, securely attach the thermostat using the mounting screws.

J.Connect thermostat wires to gas valve as shown in Figure 4.

Figure 3. Heater Mounting Information

 

CEILING

 

 

HEATER

 

24” MIN

1/4”-20x3/4”

MOUNTING

CLIP

 

HEXHEAD BOLT

 

 

HEATER WALL

 

MOUNTING

1/4”-20

 

BRACKET

HEX NUT

9”

FLUE

 

DEFLECTOR

GAS

CONTROL

VALVE

HEATER

REFLECTOR

1/4” X 2-1/2” LONG LAG SCREWS (2 REQUIRED)

58”

1/2” NPT GAS INLET (DO NOT EXCEED 1/2 PSI)

THERMOSTAT CABLE (SEE FIGURE 4)

#6 X 1” SHEET METAL SCREWS

(2 REQUIRED - INCLUDED WITH THERMOSTAT)

UNFINISHED

SIDE

THERMOSTAT (SEE INSTRUCTIONS INCLUDED WITH THERMOSTAT

FLOOR

FINISHED

SIDE

FLANGE

PREDRILLED

HOLES

Model # MH25NG/LP

HS25NG/LP

7 Installation instructions and Owner’s Manual

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Mr. Heater MH25LP / MH25NG operating instructions Heater Mounting Information

MH25LP / MH25NG specifications

The Mr. Heater MH25LP and MH25NG portable heaters are designed for anyone looking to efficiently heat small to medium-sized spaces, whether indoors or outdoors. These heaters are known for their reliability and effectiveness, making them popular choices for residential use, outdoor activities, and emergency heating scenarios.

The MH25LP is the propane model, while the MH25NG utilizes natural gas, providing versatility in fuel options to cater to different preferences and availability. Each unit is fitted with essential safety features, including an oxygen depletion sensor and an accidental tip-over shutdown system, ensuring peace of mind during use.

One of the main features of the Mr. Heater MH25 series is its impressive heating capacity. The units can produce up to 25,000 BTU per hour, sufficient for heating spaces up to 600 square feet, making them ideal for workshops, garages, cabins, and various outdoor activities. The adjustable heat settings allow users to customize the temperature to suit their comfort level, maximizing efficiency and reducing fuel consumption.

The design of the MH25 heaters emphasizes user convenience. Both models are lightweight and portable, which allows for easy transportation from one location to another. They come equipped with comfortable carrying handles, enhancing their usability for outdoor events, camping trips, or simply moving from room to room.

Another significant feature of the Mr. Heater MH25 series is the sophisticated combustion technology employed. The heaters utilize a radiant heating system that effectively warms objects and people in the room rather than just the air, leading to faster heating times and a more comfortable environment. Additionally, the units are designed with a sturdy and durable construction that ensures longevity, withstanding the rigors of outdoor use.

The units are also designed to operate quietly, making them an excellent choice for environments where noise levels need to be kept to a minimum, such as in personal workshops or while camping.

Overall, the Mr. Heater MH25LP and MH25NG are powerful, safe, and portable heating solutions that provide reliable warmth and comfort in various settings. Their combination of efficient heating, portable design, and safety features makes them an essential tool for anyone needing reliable heating solutions. Whether for everyday use or special events, these heaters stand out as dependable options to keep warm.