ments and piping requirements are fulfilled, install piping as follows:

A.In accordance with the above piping requirements, assemble piping, sediment trap, shutoff valve, and necessary fittings. Tighten all components securely.

WARNING: Failure to ensure that male threads on pipe to be installed into gas valve meet the require- ments of Figure 6 may cause gas valve damage, distortion and malfunction.

B.Install a threaded nipple, prepared in accordance with paragraph 3.2 into gas valve.

C.Connect gas piping to nipple installed in the gas valve.

WARNING: When testing gas piping use only a soap and water solution. Do not use a match or other flame for leak testing. If during leakage check gas is smelled, turn off the gas supply and ventilate building.

D.Ensure the building is properly ventilated. Without lighting the pilot light of the heater, open the gas supply valve and pressurize the piping up to the heater’s gas valve.

E.Using a brush, apply a soap and water solution to all connections and look for bubbles indicating a leak. If a leak is detected, turn off gas supply and tighten connections. Retest and tighten connections until no more leaks are found.

SUPPLY

LINE

SHUTOFF

VALVE

1/2”

TEE

3”

NIPPLE

CAP

RIGID PIPE WITH UNION OR A FLEXIBLE CONNECTOR TO HEATER

HEATER

NOTE:

1.ONLY USE A PIPE COMPOUND WHICH IS RESISTANT TO LIQUIFIED GASES ON LP INSTALLATIONS.

2.FITTINGS SHOWN ARE NOT INCLUDED WITH HEATER.

Figure 7. Typical Piping Installation

Model # MH25NG/LP

HS25NG/LP

9 Installation instructions and Owner’s Manual

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Mr. Heater MH25LP / MH25NG operating instructions Typical Piping Installation
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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.
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