Mr. Heater MHVFBF30NGT 30,000 BTU Vent Free Blue Flame Natural Gas Heater - Wall Mount Space Heater For Cold Rooms, Sun-rooms, and more - White

The 5-level thermostatic function is a must-have feature, and they surely put some thought into it. Don't buy the version that lacks it. On the lowest setting, for maybe 1000 sq ft, IN MY CONTEXT, it holds the temp at 61F, which is low enough to just leave it on all the time. I judge that it's operationally trustworthy, and you CAN leave it on while you sleep, at a central location, not in a closed bedroom, OF COURSE. The commentary that you should NEVER EVER EVER EVER do so is the sort of parrot speak started by the usual seeding of legalese, and then gets mindlessly repeated by knee-jerk-must-have-an-answer-no-matter-what types. I rigged up my own fan above it, with my own temp sensing control switching the fan on and off, since convectively heating the ceiling at one spot overhead is, if you know about this stuff, thermodynamically wasteful. Delta T governs that rate of heat transfer into the attic, ya know. PS It's kind of a big white eyesore. Wish it came in black or some nice dark shade of brown. I'm sure some interiors would agree better with various shades of green. Red, too devilish. Blue, some guys with beards would like it. Yellow, an interesting contrast to blue flames. Orange, oh the horror. ROY G B.. indigo, violet, too close to call.UPDATE: Lets enough gas escape into the room unburnt after the valve opens and before ignition occurs such that the smell of that gas is very noticeable, at least with my unit, and might bother you. How might they improve on this? Is the obviously robust pilot flame encountering too rich or too lean a mixture such that the ignition is delayed while gas blows out into the room? I don't know. Optimizing and reducing problems like this is what engineering is supposed to do, if possible.UPDATE 2: Pics of the DIY fan setup I mentioned.The temp controller is connected to a resistive sensor that is situated at the end of an aluminum foil tube reaching out beyond the most convective zone to achieve desirable cycling of the fan, via a solid state relay (AL box). This is the start of its second winter, and everything is working and good-to-go.CAUTION: It's possible to have the lowest setting of 1 not clicked into place and edged slightly towards the off/pilot side. This may allow an insufficient amount of gas to flow for proper operation. You will first notice a strong smell of gas, then when you look at the burner (not to be confused with the pilot), in normal room light, you will be barely be able to see that it has a low flame maybe a half inch tall along its length. The low gas flow delays ignition which allows more gas than usual to escape into the room before ignition happens. Just be sure to hear and feel a solid click when you set it to 1.

Muy bueno y caliente bien una casa pequeña

Still using it with no problem

Pleade see my edits at the bottom of this review and be sure to have a carbon monoxide detector installed!!!I bought this fantastic heater for an insulated room in my garage. I needed to replace a wall furnace that decided to go bad 3 months after the warranty was up a couple of years ago. I used infrared electric heaters last winter which was horrible timing, because our electric rates tripled so I almost couldn't make it through the winter paying my electric bill to heat the room.I got estimates from two local companies to replace the wall furnace and they were both over $4,000, which I totally cannot afford at this point. One of them told me I would not like this heater because of the odor of gas that would come from it. And that is one only negative that I have to say about it, is that there IS an odor of natural gas especially noticeable when I walk into the room from outside. I was not expecting it to be a significant as it is, so I am waiting for Levoit air purifier to help me and keeping the odor and the potential health effects under control. I happen to be very sensitive to chemical smells so maybe that's why other people aren't mentioning it and their reviews. I thought the person who warned me about it was trying to steer me away because he didn't sell them, but he was right about it.All that being said, I'm extremely happy so far and very impressed with the Comfort level that this heater puts out. I'm in southeast Michigan and it's already chilly especially in the evenings and this heater has kept the temperature at a steady 70 to 73 ° day and night and set at the lowest level ! I believe the fairly large pilot light also helps keep the room warm on its own, so the unit doesn't need to run as often as it normally would . I had my generator worker install this because he certified in gas Appliance installations and he had no issues installing it. We use the suggested Universal gas line hook up, as well as the blower, that also works extremely well. The blower is slightly noisy and it clicks when it goes off for a minute or two but it's not enough for me to save that's a negative feature of this heater.The only other negative I would say is that the knob control for the Heat and to light the pilot is on the top of the unit and since I installed it on a wall it's a little bit difficult for me to see exactly where the setting is, so even though I'm fairly tall I need to use a step ladder so that I can actually see what I'm doing. It would have been helpful to have the control knob on the side or maybe an electronic readout on the front that we would reflect the heat level for people who do a wall installation. If you're of a short stature or don't think you can get on a step ladder and you're going to install it on a wall, you may want to rethink that and consider placing it it on the floor, or installing it low enough on the wall that you can see it easily. Otherwise it'll be a little bit of guesswork especially at first until you get used to how the knob works.Another thing that I truly like is that I had the choice of the white color, because some Brands here on Amazon only offer black.Lastly I want to thank Amazon and Mr. Heater for saving me $4,000 to be able to heat this room where I have a cat living currently!! He's slightly feral so I can't bring him in my house but I want him to be warm and comfy. Plus, I will probably save at least $250 to $300 per month this winter by using Natural Gas instead of an electric heater. The electric heaters are said to be very efficient but I can tell you from experience the absolutely are not! This was a great buy and I highly, highly, HIGHLY recommend it. I don't have the air purifier yet so I can't say if it's going to help the older issue or not, but I'm pretty confident that it will because it's supposed to remove odors and VOC's.. I don't think you go wrong with this purchase and assuming all goes well and it works without issues in the coming years I will be a Mr customer for life!.Update 10/2/2023. After using this for 8 days it wasn't igniting properly and ended up setting off my carbon monoxide detector. The ODS didn't shut off the heater! I called Amazon and they sent me a replacement and I also called the company and spoke to Dennis who was very helpful and told me the 30,000 BTU was too large for my 450 sq ft. space even though the description says up to 1000 sq ft. It needs more oxygen than a small room can provide. He also said the heater could have been damaged during shipping and that could have caused the gas odor to be so strong. I will be replacing this with the 20,000 BTU unit and will keep a window cracked. Not happy about that but better than paying thousands for standard wall furnace. Lastly the air purifier didn't help the gas odor at all so I'm waiting to find out if a different filter they make would work better. Amazon customer service has been fantastic helping me to return both 30,000 BTU heaters that were delivered. Very happy with them!

We have this heater in our 1200 sq ft finished lower level. We can use it as the sole source of heat down there and it will keep it a comfortable 68 degrees on setting 2 or 3 (out of 5). We’ve never turned it higher than 3.5, even on the coldest days (was 9 degrees this morning in PA). The amazing part is, zero CO emissions. I have a super sensitive industrial carbon monoxide detector for work, and the reading right above this heater is zero. I was shocked, thought I’d get at least a little blip on the meter, but got nothing. Zip. So yeah, you can say it burns cleanly! That said, it’s a non vented gas heater…so yes, it does put out a tiny bit of ‘gas heater’ odor. I’m talking, like nothing… but if you sniff for it at the top of our stairs, you can tell it’s running, kinda. Regardless of what the instructions say, I wouldn’t hesitate to use this 24-7 indoors. Of course….Carbon monoxide detectors are mandatory if you use any gas burning appliance.