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F270125 Features: -Forced Air Propane Heater. Specifications: -75,000 - 125,000 BTU.-Heats up to 3,000 Square Feet.
Amazon.com
The MH125FAV is the least powerful of Mr. Heater's line of propane forced-air heaters for larger jobs (see the MH170FAVT and the MH400FAVT). Even so, it still gives you up to 125,000 Btu--enough to heat 3,000 square feet. Though the larger models give you more Btus, the heaters in this line share the same basic features, including an automatic shutoff with loss of flame or power supply and a high-output fan that circulates heat quickly. Hooking the heater up to the 40-pound propane cylinder (not included) is easy, and the 10-foot hose and regulator are included. CSA certified. One-year limited warranty.--Josh Dettweiler
What's in the Box
Heater (motor grille assembly, motor assembly, fan, outer shell, handle, clip handle mounting, male elbow-fitting, spark plug, high limit control assembly, thermocouple bracket and spacer, orifice assembly, middle cylinder assembly, spark plug nut, flame holder assembly, fuel tube assembly, 13-inch long thermocouple, bracket ignition/relay, terminal board, relay assembly, solid state ignitor, variable rate valve, thermoelectric valve, strain relief bushing, power cord assembly, POL excess flow 1/4 MPT, 28-inch regulator WC, hose assembly LP, bottom panel, control box assembly, elevation plate and knob), 10-foot hose, regulator, operating instructions and owner's manual
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.
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.
Michael
Reviewed in the United States on January 24, 2025
Great heater, warms a room fast!
dennis
Reviewed in the United States on April 3, 2015
nice unit. works great for what we wanted it to do. came quickly, assembly was easy. it is an easy unit to operate and is pretty thrifty on fuel.
sTaLwArT 420
Reviewed in the United States on June 24, 2014
Its like a giant giant big a$$ heater/ boooozooa. Used it for heating my garage! It shoot out giant flame at the end. EZ to start just like a BBQ grill. Push buttton click click after you get the propane dripping. Make sure the seals are good and tube connected well before you start. I have it connected to a 100 gallon tall propane tank. It burned for hours and hours while i worked on my baby! High recommended. You can NEVER have tioo much heat! You can also adjust the BTU size if it gets to hot hot hot!
T. Eisenbraun
Reviewed in the United States on March 19, 2014
We bought it and it worked for a while. After a few weeks, it would not ignite . We were sent a new board which did not fix the problem. Called tech support and we were told to by pass the high heat sensor with a paper clip. I cant see that this is an acceptable practice to override a safety feature.Then we talked to the next level person and they asked us to jump across the two wires that come from the circuit board to the high limit sensor.Come on. Never again.
Two Port Support, LLC
Reviewed in the United States on November 16, 2014
Used this twice. Second time being a 20 amp circuit and the homeowner replaced the outlet with a 15 amp making me believe it was ok to plug this in. As soon as I pressed the button to ignite.. a little puff of smoke came out and it was done. Gas and fan worked but no igniter. BAD DESIGN. Also be prepared to buy a 100 lb tank. This sucks down the propane. On a positive note.. I have a 28 x 30 garage with pretty much all open construction and this unit gets the garage warm fairly quickly (1/2 hour - 45 min~ ) and maintains a decent warmth in winter.
Charles Steel
Reviewed in the United States on March 7, 2013
Two heat settings... works well on both settings...Pretty good on propane on the lower setting.Bit of a gas hog on the high setting.
Woodie
Reviewed in the United States on April 2, 2013
Is a good heater but uses to much fuel, will use a full 40 lb. tank in less than one day.
LA in Ontario
Reviewed in the United States on January 10, 2011
This is a FANTASTIC heater but there are some things a new buyer should be aware of. It'll bring a 30x60x12 garage from 0 to 60 in about an hour and a half. However you really do need a 100 lb tank. You can get away with a 40 or 50 lb heating a smaller area on low otherwise the tanks will condense and shut off the gas flow to the heater. They are louder than you'd expect if you haven't used one of these before because of the blower fan. Think mini jet. I've also used the convection style heaters and depending on your needs these are both great. The convection style is much quieter but takes a fair bit longer to heat a large space and you won't get as even a heat in the room. For larger spaces or fast heat up the forced air heater is an awesome product.
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