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The Mr. Heater MH25NG garage heater is a quiet, odor-free, and low maintenance option for heating your garage. At 25,000 Btu, this unit is powerful enough to heat up to 500 square feet. It uses radiant heat, so it doesn't waste fuel heating the surrounding air (it doesn't use any electricity, either). The heater comes fully assembled out of the box--all you have to do is mount it and hook it up to your existing natural gas line. Includes free "How To" video. Do not use in inhabited or small, enclosed areas. AGA design certified. One-year warranty on gas control; five-year warranty on burner.--Josh Dettweiler What's in the Box
Heater, bracket, lag bolts Five Tips for Buying a Heater
Choosing a space heater is a matter of sifting through a bewildering array of types, power ratings, and fuel sources. Let's break it down a little to make the process easier. What are the different types of space heaters?
- Radiant heaters emit infrared radiation that directly warms the objects in front of the heaters (rather than the surrounding air). If you only need heat by a desk or in a small section of a room, a radiant heater is quiet and will use very little power.
- Forced-air heaters use a fan to blow air that has been warmed by metal or ceramic heating elements. A forced-air heater is appropriate for quickly heating up a small- to medium-sized room, but can be noisy.
- Convection heaters draw cold air from the floor; the air is warmed by heating coils and emitted from the top of the heater. A convection heater is appropriate for quickly heating up a small- to medium-sized room, but also can be noisy.
- Radiators work by heating oil enclosed in a reservoir, gradually heating the surrounding air. If heating speed isn't an issue, you might want to opt for a radiator. These are extremely quiet and effective--perfect for bedrooms.
Should I buy an electric or a combustion model?
If you want a heater that will be available in emergencies, or that can heat areas larger than a single room, choose a "combustion" model--one that is powered by a gas or fuel like propane, kerosene, natural gas, or diesel. Which fuel type you choose depends largely on convenience and local availability. For example, diesel would be appropriate for a heater you take with you on long car trips. How powerful a heater do I need?
Heaters are rated by BTU, which stands for British Thermal Unit (the amount of heat needed to heat one pound of water by 1 degree F). To find out how many BTU you need:
- Calculate the volume of the space to be heated by multiplying square footage by height.
- Multiply that number by 4 if your insulation is poor, 3 if it's average, or 2 if it's good.
The resulting number is a ballpark figure for how many BTU you'll need.Do space heaters cost a lot to operate?
As a general rule, electric space heaters are more expensive to use than combustion models. To ensure energy efficiency, a thermostat is a must-have feature for any heater. For radiant heaters, models with a 360 degree heating surface can heat larger spaces. If you need a forced-air heater, models with ceramic elements tend to be more efficient. Are space heaters a fire hazard?
Space heaters are implicated in about 25,000 residential fires every year. To ensure proper safety, always follow the manufacturer's usage instructions and fill out the warranty card to receive informational updates from the manufacturer. Also, look for extra safety features such as an automatic shutoff switch that can shut down the unit if, for example, it gets upended. In addition, choose a model where the heating element is adequately enclosed within the unit.
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 Great outside heater |
| Review Date: July 1, 2010 |
| Reviewer: Glycol, |
| I bought this heater to use outside on my patio instead of the standard propane heaters. I worked out great! I removed the pilot light assembly and plumbed the gas line directly to the heater. I added a valve so I could adjust the flow. To start the heater I turn on the gas and apply a lighter. It makes the system so simple and foolproof. I find this gives plenty of heat for a table outside on the patio. |
garage heater - Mr. Heater
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| Review Date: August 22, 2005 |
| Reviewer: Robert Grattan III, |
| I haven't installed this yet but was pleased with the cost savings and the free shipping. I frequently order through Amazon because of this. |
Mr Heater 25000 BTU
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| Review Date: February 2, 2004 |
| Reviewer: , |
| This is a really nice unit if it fits your purpose. I must stress however, that is if it fits your purpose. As I now realize, 25,000 BTU/hr is not an enormous amount of heat. This unit really is designed for use in a closed in space w/ minimal air curculation. The heating method is to raise the temperature of all objects in the radiant field so that the space stays warm. A breeze or draft will reduce it's ability to maintain the heat. The unit comes with a thermostat for mounting on a wall and setting a desired heat. I've eliminated the thermostat and just hard wired the unit. If it's cold enough to have it on, then I want it on. Mr. Heater advertises using the term "millivolt" ignition or something to this manner. This is misleading. This is not a electronic ignition unit!!! This means the unit has a pilot light. The pilot light heats a thermocouple which provides the "millivolt" current they refer to. The thermostat either "opens" or "closes" the circuit, depending on the temperature and thermostat setting. The "closed" loop opens a solenoid valve in the pressure regulator which releases the gas to the burner. My unit is installed on a large covered patio outside approximately 8' above a sitting area. Sitting below the heater in a 8' diameter circle is nice and toasty, even with a slight breeze. Sitting across the table at 12' you can feel a slight warming effect with no breeze. More than 12' away....no impact. This is not a highly effective heater if used in an open space. As advertised....this is a garage heater. To get the heat I need I am adding a second heater across the patio from the first. Clearances around the unit are important. I have 2' clear above my unit, and the lumber above the unit gets warmer than I would like. After 2 hours of use I can touch the wood with my bare hand without having to remove it, but it is quite warm. I'm thinking about 120 to 130F. I have some harditrim up there too and it is even warmer. Not too sure how long the paint will last. Installation is a breeze. Includes a video if you need it, but there is essentially nothing to it. Good buy....if it's what you need. If you are thinking of installing it outside......you may want to consider getting more BTU's. |
Good cheap garage heater
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| Review Date: December 8, 2005 |
| Reviewer: Palhaco, Northern Utah |
I purchased this heater about 2 years ago to keep my garage about the freezing level, principally to melt ice and snow from the cars, but also to provide a comfortable sleeping environment for my dog (and to keep his water from freezing). For this purpose, it works very well, and even keeps the snow melted from my snowthrower, which I keep on the opposite side of the garage. It was quite easy to install after getting all the proper fittings and hoses, which are not included.
I do have some complaints, which keeps me from giving this 5 stars.
1. Clearance is very important. When the burner ignites, I'm always alarmed because of the small ball of fire that the heater emits across the burner.
2. Because of the radiant heat nature, I have burned my hands while working under the heater, similar to getting a sunburn.
3. I've had problems with the pilot light going out. It is easily adjustable with a screwdriver, but is very sensitive and this was very annoying to fine-tune in the beginning. I still have to adjust it about once a year.
4. The garage always smells like natural gas.
This heater worked well in my situation, because I had natural gas stubbed into the garage when the house was under construction. Had I not done this, I would probably opt for an electric heater next time, and this means you need 220 volts. Depending on the size and type of heater, most also require some type of vent.
I would recommend this heater as it works as advertised for my 625 SF garage. However, I also recommend you explore other options first. |
Good space heater
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| Review Date: October 19, 2004 |
| Reviewer: S. Lau, Ohio USA |
I have used this in my garage for several years now, if I have my garage door closed it will warm the space pretty well. Directly under the heater its really nice and toasty, but the furthest corner of the garage will still be cold. In a 20-degree day with the garage door closed (I have a two-car garage with most of the garage walls NOT insulated), I get over 70 degrees directly under the heater (where I usually change the oil etc.) and at least 40 degrees at the coldest corner of the garage. Most of the garage becomes very comfortable to work in, that I usually don't even need to wear a jacket. BUT - as soon as I open the garage door, I lose all the warm air and it takes a little while to heat the whole place back up. That being said, I typically also let it run for an hour or so before I start working on my car, just so I know the area is nicely heated.
Hope that helps. :)
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