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Availability:
In Stock.
Arrives
Sep 15 – Sep 16
Recently Viewed
Material Type: Propane
Features
- 20,000 BTU/HR
- Heats up to 700 sq. ft.
- Battery operated electronic ignition - requires one AAA battery (included)
- No Electricity Required
- No venting or chimney required
- Indoor Safe
- ODS low oxygen safety shut-off control
- Blower Fan Kit Sold Separately (F299201)
- Economical - 99.9% efficient
- Operates with Liquid Propane
Description
This Blue Flame 20,000 BTU Liquid Propane Vent Free heater is the perfect supplemental heating solution even on the coldest days. This heater is conveniently equipped with a thermostat for superior control of the temperature in your space. Also, with a battery powered electronic ignition, starting it is a breeze - battery included. This unit can be permanently mounted to the wall with included mounting brackets. Feet for floor mounting are not included. A clean burning blue flame tube burner uses the natural convection of the burn to circulate warm comfortable air. With a factory standard Oxygen Depletion Sensor (ODS), rest assured this heater will provide you with years of comfortable and safe heat.
Brand: Mr. Heater
Special Feature: Low-Oxygen Safety Shutoff
Color: White
Form Factor: Cabinet
Indoor/Outdoor Usage: Indoor
Special Features: Low-Oxygen Safety Shutoff
Form Factor: Cabinet
Indoor Outdoor Usage: Indoor
Power Source: Propane
Heating Method: Convection
Recommended Uses For Product: Home, Office
Mounting Type: Wall Mount
Room Type: Bathroom, Bedroom, Dining Room, Home Office, Kids Room, Kitchen, Living Room, Nursery, Study Room
Heating Coverage: 700
Heating Element: Radiant
Heat Output: 20000 british thermal units
Fuel Type: Propane
Max Temperature Setting: 900 °F
Item Dimensions D x W x H: 11.42"D x 20.28"W x 25.51"H
Item Weight: 19.6 pounds
Brand Name: Mr. Heater
Model Number: F299720
Unit Count: 1 Count
Warranty Description: 1 year limited.
UPC: 089301000773
Global Trade Identification Number: 73
Included Components: Wall mounting hardware included
Item Type Name: vent free heater
Manufacturer: Enerco Group Inc.
Part Number: F299720
Color: White
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sep 15 – Sep 16
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: installed
I also use a de-humidifier when using this... to reduce the moisture it could cause. works fine. hooked up to 20gal tank.
Reviewed in the United States on July 19, 2026 by MB
Style: installed
Purchased as an emergency heat source. I've owned it for 2-1/2 years and used it 3 times most recently for about 4 days. The first time I used it was for about 24 hours when it was 38 below and my fancy high-efficiency furnace had pressure switch problems and wouldn't run. This 20k btu heater on its highest setting kept ~750 sq feet of my (not very well insulated) home pretty much comfortable but did use about a pound of propane per hour which makes sense because propane is ~21k btu per pound and this is rated to use 20k btu per hour on high. Kept us warm enough and kept the pipes from freezing until I could obtain a pressure switch for the furnace. That use case was exactly what I worried about enough to buy a back up heater. It performed admirably. Last week in temps ranging from 22 degrees at night to 38 degrees during the daytime and 20-40 mph winds sucking the heat out of my place, I ran it for just a bit less than 4 days during a power outage. I never turned it up past the #3 setting and the thermostat switched the heat on and off as expected. After ~4 days, there was still at maybe 8-10 lbs of propane left in the 30lb tank it was hooked to. I think I could have gone at least another full day without having to swap tanks. I use the included feet and don't have it permanently mounted to the wall. It's perfectly stable. I run the regulator hose to a tank outside through a casement window and just run a strip of duct tape to seal the rest of the window. And, while I do have an CO & combustible gas detector in the area where I operate this, I don't actually worry about it. So long as the flame is almost entirely blue and it isn't sputtering, then everything is working right and there's nothing to fret about. When I bought this, I understood that I needed a hose, regulator, and a 90 degree fitting. Many of the negative reviews regard folks not knowing that. I suppose in today's world where we expect instant gratification and hope to put forth zero effort, it's hard to blame them for being upset. It wasn't any sort of problem for me, though. Other complaints seem to be about noises and odor. 1) Noises. I haven't really noticed any noises that are bothersome. There's a tick when the thermostat regulates the gas up/down/on/off, but that's what mechanical thermostats do. No problem for me. 2) Odors. Yes. Burning propane indoors unvented creates a bit of an odor. It's no worse than operating a propane oven/stove. I don't find it to be overwhelmingly offensive, so no problem for me on that point, either. I will say that 2 days in to this latest use, I did choose to open a couple of windows on each side of the house for about 15 minutes once. That served to remove the odor for a while and decrease the humidity a little.
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Reviewed in the United States on May 10, 2024 by six
Style: installed
I purchased a 30,000 BTU heater a few months back and love it. For the master bedroom & bath I've been using electric heaters. After still freezing in the back half of the house and a $600 power bill, I decided to buy another propane heater. In such a small area I certainly didn't need 20,000 BTUs but this was the smallest I could find with an actual thermostat. The thermostat works great! The range is marked 0-5 not in degrees. But they are very accurate. #2 setting keeps it at a toasty 74 degrees when it's below freezing outside. Being so large, it only runs for less than a minute cycling on & off as needed. I expect it will pay for itself the first month. It can set on the floor with the included feet or be wall mounted with the included bracket. It's a bit modern looking for my taste but the blue flame and performance more than makes up for that minor flaw. To connect it to a gas supply, you will need some brass fittings / hardware, a hose & regulator unless connected to your main supply. Every component is available on Amazon or your local hardware store. Don't forget teflon tape for the threaded pipe joints! Maintenance is quick & easy. Basically cleaning the pilot orfice of dust that may accumulate. The manual says every three months. My house apparently lacks any insulation and resembles a wind tunnel. (I bought it over the phone, without seeing it first lol. Initially I didn't care, I bought it for the land & planned on building a new house anyway. I just never imagined it could be this bad.) I'm in awe these two heaters can keep up but they do, and quite well! They are comparatively economical to operate too. Hopefully our new house will be finished before next winter. And yes, I'm transferring these heaters to the new place! If it turns out they aren't needed, I can put them in the stable to keep my horses warm. I would absolutely buy them again and highly recommend them! To clarify, the larger heater (30,000 BTU) in the living room would heat the entire house but the back is generally closed off. That's why I needed the smaller 20,000 BTU unit. FYI the thermostat in the living room is set about 2 1/4 to maintain 74 degrees. Obviously you can adjust the temperature to your liking. I prefer HOT. Shipping was fast and very well packed. UPS proof. After using them I suspect they would perform equally well in a workshop / garage where open flame wouldn't be an issue. Buy this, you will be VERY happy with it. Update... After complete satisfaction with the first two, I just bought a third for my workshop. This time Amazon suggested a hose & regulator kit which I gladly bought with it. It's somewhat of a pain in the rump to find the right hose & fittings each time. This made it really easy. Everything was included but a tank (which I already have). I think it's actually less expensive in kit form as well. I might buy #4 for the barn to spoil my horses. 😉
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Reviewed in the United States on January 11, 2023 by Jeff P
Style: installed
Heats very quickly. Smells like gas a little but works well.
Reviewed in the United States on June 14, 2026 by Thomas Jones
Style: installed
I'm absolutely thrilled with this heater. It is, and can be a literal lifesaver. Bought this to put in a 40ft motorhome for a back up.... Just in case of a power outage..... The afternoon I installed it, temps dropped to 11° below zero and stayed that way for a week. As anticipated, power went out 4 hours after I installed it . I couldn't believe it. This heater ALONE kept my place 70° without a hiccup, in -11° weather and I never got past the minimal setting. (#1 out of 5)! I've had it for 9 days, it works perfectly, thermostat works perfectly, off and on again by itself, without me having to leave my comfort zone. No noise, ( I expected some cracking sounds as the metal expanded and contracted) as it warmed and cooled. Nope, totally quiet. For my money.... It is an incredible value. The design is total simplicity, if it's not operating correctly, the fix can't be too complicated. It got the real test the very first night, and totally exceeded any expectations I had. UPDATE: 11 Days after installation, heater emptied a 100 pound propane tank, ($75 worth). I had high hopes this would be a cost effective alternative to heating with electricity. For me.... It is not. Even though it got me through a week of sub zero weather, including two power outages, and never needing to turn the thermostat past #1, it went through propane like it was water. I was hopeful that a 100 lb tank would last a month. At this rate of consumption, a month of use, on the lowest possible setting, would cost me $220. That, in addition to my electric bill, just doesn't pencil out to be feasible for use as a soul heating appliance. However.... In an emergency, power outage type situation..... It could be a lifesaver. IF............ You have a substantial amount of propane on hand. One's not much good without the other.
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Reviewed in the United States on January 19, 2024 by Skip
Style: installed
Great heater. Purchased this heater to heat my 140 Sq ft. Insulated shed in the cold mount Pocono PA winter. Outside temps were -11F. Within 45 minutes it was cozy 68F from 15F. One gallon of propane is 90k Btu, so at 20k Btu/hr, one gallon would be enough for 4hrs.
Reviewed in the United States on June 11, 2026 by abdimona
Style: installed
Bought this thing just to supplement heat in my small living room {16X12} . Installed a hose & regulator suggested for the 20,000 BTU model . there's no inlet fitting supplied which ought to be for a 200$ heater. Finally got it to light set on low #1 ..flame went out less than a min. Set on lo #2 flame went out after a minute or 2. Set heat on setting #3 stove stayed lit , but flame was low as setting #1. Ok so it has a thermostat , I turned the room heat or thermostat down to less than 70 .. Let room cool down , tried turning lp off a while. Turn Lp back on set On # 1 lo , same thing as b4. Same for lo #2 . You had to stand 2-3 feet from the heater to tell it was on ..Yes I did add the blower kit . I ran this thing for a good 3 or 4 hrs. This thing is a waste of time & fuel in my opinion .. Of course it appears that return shipping's not offered free cause It's not Amazon's product. Buy it if you like ..i'm sorry i ever saw this thing .
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Reviewed in the United States on December 7, 2021 by James Tee
Style: installed
Second one I've purchased. Both are doing a great job! Easy to install and use. Puts out a ton of heat. I think it works best with the optional fan.
Reviewed in the United States on April 29, 2026 by Chris