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Your cart is empty.Mr. Heater 20,000 BTU Vent Free Blue Flame Dual Fuel Propane and Natural Gas Heater delivers reliable and safe supplemental heating for areas up to 700 square feet. Ideal for sunrooms, cold rooms, cabins, and additions, this wall unit gas heater is designed with Mr. Heater’s patented dual-fuel system that enables seamless operation with both fuel types. Equipped with dual oxygen depletion sensors and a fail-safe fuel selector knob, it prioritizes safety and ensures correct installation. Its technology efficiently heats spaces through natural convection, circulating warmth evenly without the need for a fan. The built-in electronic ignition and on-board thermostat provide superior temperature control, making it easy to maintain consistent comfort. Installation is simple with included mounting feet and wall-mount hardware. For added security, this heater is engineered with a low oxygen safety System to ensure continuous, safe operation. With Mr. Heater’s two-step fuel connection process, accidental fuel mix-ups are prevented, giving you dependable warmth you can trust. Enjoy powerful, clean, and comfortable heating with this versatile indoor gas heater.
rbeny
Reviewed in the United States on January 23, 2025
This product will work with either natural gas or propane. However, it is designed to be set up and stay in one or the other. It comes set up for propane and requires modification to be used with natural gas. If you modify it for natural gas, it must be re-modified to switch it back to propane if you later choose to use propane. It is designed to be in a "permanent" installation, not as a "portable". Note that a "professional" is recommended to accomplish the change and set up of the heater.There is no easy way to allow you to switch gas supply from one or the other for use depending on which is available when you need to use this appliance. For example, a dual fuel power generator allows you to easily select the desired fuel depending on the fuel preference available at the time of use. Changing fuel types is not easy with this appliance. Thus, in my opinion, it is not a true dual fuel appliance.Please also note that the Mr. Heater brand makes similar units that will operate from only one fuel, either propane or natural gas. These are available at lower cost. If you know your available fuel source ahead of time, simply order the appropriate model and save some money. This might be more appropriate to keep in stock by a contractor, someone that services different locations and doesn't know which he might need to keep on hand for various customers.It does have a location to mount an optional blower fan to help circulate the heat. The fan mounts on the back (not shown in the pictures). So if a fan is used, it would not be able to use the wall mount option. The fan, of course, requires an electricity source, but the heater does not. The mounting location for the fan appears to be a "knockout" type, that must be punched out for mounting to mount the fan. I did not attempt to mount a fan, so I do not know how easy it is to install.The box was very beat up when received, but the unit appears to be intact and nothing appears to be obviously missing. There is no detailed list of what should be in the box. The screws provided are not identified as to their individual purpose.I am returning it since it does not meet my needs for a dual fuel appliance. Otherwise, it appears to be a well built unit. I did not use the unit so I cannot comment on actual function.
JEM
Reviewed in the United States on February 28, 2024
installed in garage.... works very well. has a slight odor if left on long term.
Sylvester
Reviewed in the United States on February 21, 2024
Came NOT configured as stated in manual. Had to redo. Would not function until. Shipping OK.Beware
Customer
Reviewed in the United States on February 18, 2024
These are great heaters at a great price. Very dependable.
J Callaci
Reviewed in the United States on February 16, 2024
Nice Heater. It would have been nice if they added a 79 cent handle to pick it up. I added a brass elbow and a Q.D. (Quick Disconnect). I also had to buy a propane regulator and hose for it. All in all, I think if you’re looking for a portable (emergency use) heat source, this will do. Remember size it to your room. I believe the instructions say allow a minimum 50 cu. ft. / 1,000 BTU’s
John F.
Reviewed in the United States on December 24, 2024
When I received my heater the box was torn up everywhere, and after spending $500 to install it the heater did not work. I know there good heaters because I have another one at our hunting camp so I reordered this one and hopefully it will work!
Jason
Reviewed in the United States on December 11, 2024
Heated 700 sq foot cabin well
Mark Edwards
Reviewed in the United States on December 5, 2023
Climate change has caused many power outages throughout the U.S. It’s nice to have a back up heater just in case the power goes out. This burns on both types of gas & is vent free-burns 99.99% efficient. Buy one, you won’t be disappointed.
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