Mr. Heater F260550 Big Maxx MHU50NG Natural Gas Unit Heater,Black

Hopefully this review is useful for other, it was hard to find real examples of use like this to get an idea of how well this unit will heat my space. I am heating a 21'x33' garage with an 11' ceiling. Walls are insulated at about an R15 but ceiling with unfinished attic above it is not insulated. Overhead garage door is insulated. Here's the data: Outside temp: 28F Garage Inside temp when heater was turned on: 40F 30 minutes after heater on inside temp: 53F 1 hour after heater on inside temp: 59F 2 hours after heater on inside temp: 65F The heater was able to get the temp inside the garage up to 70F after about 2.5 hours after not being used all day with an outside temp of 20F the other day as well and it keeps things very nice and comfortable. I cannot speak to reliability as I just purchased, but installation was easy (check Menards for their category 3 horizontal venting kit as it is half the price of the manufacturers kit), and the price was insanely good compared to all of the other options. I was quoted $3500 installed for other brand units from several different local HVAC companies and I was out the door installed (had a local company do part of the install) for around $900 total. I put the unit up and ran electrical but had the installer do the gas line and vent kit install. Since the unit was so inexpensive, I did add the 4 year Amazon protection plan. Hopefully it lasts a long time but if it doesn't, at least it will be easy and free to replace. All in all a good value and it gets the job done.

Just what you would expect from Mr Heater. Was easy to install and has been heating my Minnesota three car garage for about three years now without any issues. I keep it at 50 degrees most of the time and the gas bill only went up like $7 a month. Highly recommend it.

So worth the price, and very easy to install. Yeah the exhaust duct work costs almost as much as the unit itself. But We'll Worth It!!! Heats up the Garage almost instantly, my Garage is a 1 1/2 car garage. It's 12°outside currently in Buffalo NY. 01/20/2020. Turned the heater on and it was warm in 7 minutes, about 60°. The fan is quiet, don't listen to the other reviews. Not saying that their unit was loud but maybe they had something wrong with their fan?? My garage is a Gym and to work out in the winter it's great to have the Garage Heated. This unit goes ABOVE and BEYOND my EXPECTATIONS. Im VERY PLEASED with the performance, the ONLY advice i can give is that THE DIRECTIONS SAY TO pitch the duct work UP a quarter inch per foot. DO NOT pitch it UPWARD!! the CONDENSATION will run right into the heater. Their is a Fan their inside the unit that will get wet and ruined. I had to fix this because for 1 i could not find a 4" piece that's shown in the instructions that had that DRIP HOLE where you have to attach a drip hose to. I don't know why you would want a hose hanging down from your exhaust anyway with nowhere to drain it to... "PRO TIP" So angle the duct work downward and this way the sweat/ Condensation will run outside - out of the exhaust. If not you're going to have sweat and condensation running towards the heater ruining and rusting the inside of the heater. That's the only thing that I seen in the instructions that were horribly wrong. Everything else was a breeze. The gas line, the electrical, the thermostat simple work. I am installing a smart thermostat so I can control it from my phone, So when I wanna go out there and work out I will turn to thermos son 5 minutes before I go out their. Thank you, hope this review helps someone.

Unit came with dent in top front (not service affecting). Went in pretty easy hard piped gas line directly to valve box. No flex hose no copper. Us made black pipe and fittings no Home Depot leakers. Ran separate circuit with receptacle and switch from gFci breaker directly to unit. B vent up 7 ft through roof. No leaks no fires. 28x28’ shop 10’ ceiling. Good insulation everywhere. 50,000BTU. Have analog thermostat set at 55 could easily keep shop 72 with little effort. Even in sub zero temps. Unit is made in Mexico, not too loud when blowing. Has odd but normal sound when it calls for heat and ignitor turns on. Hope to get 3 winters with no issues. Then I expect ignitor issues, flame sensor trouble etc. Pretty fair price. Venting can be expensive! I plan on trying to keep unit clean this should help longevity.

Great for a shop or an area where heat on demand might be required. Parts are readily available and now they offer a direct vent package a separate cost. I bought this unit with the intention of installing in another building as the one that I purchased in 2012 is still working fine other than a circuit board that I had to replace this year that was also available on here at a fair price just like the heater.

Very good

Had the unit professionally installed in a new workshop space. Went in without problems, worked when first fired up, and ever since. Puts out a lot of heat in a short time, but without scorching its mounting or surrounds.

Became intermittently noisy after about 3 days in operation and very noisy after about a week. Mr.Heater wasn’t much help. Amazon replaced it on the 29th day. New heater was shipped to me but without prepaid return shipping. I had to pay return shipping but was credited the shipping cost onto my account. New heater has been working great since the install. Very quiet. Heats my 24x26 garage nicely. I did find the exact same heater in town on sale for $100 less with a regular price equal to Amazon. Do your homework and check locally first. Edit: September 4/19. Tried to start heater to test for the upcoming season and nothing. Verified 120acv and thermostat to be ok. Will attempt to contact Mr.Heater to resolve this issue.

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