Provide adequate clearance to combustibles per Table 3 at control end of heater for servicing and minimum on top and sides for ventilation and combustion air supply.

A minimum clearance of 8’ above floor for public garages in accordance with NFPA No. 88 most recent edition, or Figure 1; whichever is larger.

Canadian installations in public garages must comply with CGA 149B.1.9 most recent edition.

CHAPTER II

HEATER INSTALLATION

1.GENERAL INSTALLATION INFORMATION AND REQUIREMENTS

WARNING: Maintain clearances as shown in Figure 2 or on heater nameplate.

The required minimum clearances to combustible surfaces are illustrated in Figure 2 and Table 3. As shown on Figure 2, the front of the heater is installed at the minimum required clearance to combustible surfaces and toward open space, and then the other sides must have a minimum clearance of 16 inches to combustible surfaces.

EXHAUST CEILING

VENT

16”14”

MINIMUMMINIMUM

OPEN

WORKSHOP DOOR

3016”

MINIMUM

HEATER

WALL

14-1/2”BRACKET

48”

MINIMUMNOTE:

1. ONLY FLUE SIDE OF HEATER CAN BE ELEVATED (30o).

2. HEATER SIDE REFLECTOR MUST BE HORIZONTAL.

FLOOR LINE

Figure 2. Installation Clearances to Combustible Surfaces

Table 3. Installation, Ventilation and Mounting Information

 

BTU/HR. RATING

NORMAL

 

 

 

 

MODEL

GAS

MOUNTING

CLEARANCES TO COMBUSTIBLE SURFACES

NO.

NAT.

L.P.

POSITION

TOP

SIDES

BACK

BELOW

MH/HS25NG

25,000

30o

14"

16"

16"

48"

MH/HS25LP

22,000

30o

14"

16"

16"

48"

 

 

 

 

Model # MH25NG/LP

HS25NG/LP

5

Installation instructions and Owner’s Manual

Page 5
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Mr. Heater MH25LP / MH25NG Chapter Heater Installation, General Installation Information and Requirements

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.