Mr. Heater Corporation Vent-Free 20,000 BTU Blue Flame Propane Heater Review

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Last Updated: 12/16/2020

Sometimes you need extra heat in your home. Maybe it’s because you live in an older house or apartment that has a poor HVAC system, or maybe you worry about paying your energy bill at the end of the month. Whatever the case may be, a reliable propane heater can be the answer. These often portable models use inexpensive propane as a supplemental source of heat, meaning you can stay warm and still pay your bills. For a great option indoors, you need the Mr. Heater Corporation Vent-Free Blue Flame Propane Heater.

Mr. Heater Corporation Vent-Free Blue Flame Propane Heater

Mr. Heater Corporation F299720

  • 20,000 BTU Liquid Propane heater
  • Heat spaces up to 700 square feet
  • Run Time (Hrs at Max BTU)- 21.59
  • 24.8 pounds weight

Product Overview

This propane space heater is a valuable contribution to any home because it produces roughly 20,000 BTUs of energy while still being clean burning, so users don’t need to worry about having smoke in their homes. The Mr. Heater Corporation Vent-Free model looks like a miniature fireplace that produces stylish and modern blue flames. It creates enough energy to heat 500 sq. ft., making it ideal for apartments or a single floor of a larger home.

This Mr. Heater model runs on propane and is primarily meant for indoor use. It is a convection model designed to heat the air rather than objects around the device. The Fuel Consumption/Burn Rate (Gal/Hr.) comes out to a respectable .926 lbs/hr. This is equal to roughly 21.5 hours of heat, so you can turn this on in the evenings and have enough power to get through the week.

Besides being fuel efficient, the Mr. Heater Corporation stands out because of its automatic low oxygen shutoff system. What this means is, when the heater realizes there is low oxygen in the room, it will stop releasing propane gas and shut off to prevent eliminating all oxygen and potentially causing asphyxiation or a fire hazard. Legs and wall mounting hardware are included with this product for easy installation.

Finally, this heater is a respectable size. The full product dimensions are 23.8 x 11.2 x 27 in. while the device weighs 24.8 lbs. This is quite heavy for a propane heater, but combined with the mounting hardware, it means this heater won’t be knocked over easily.

Propane Heater Information

Propane is a popular alternative fuel source because it is portable and inexpensive. It is created as a byproduct of natural gas harvesting, usually when fracking or working with shale. The propane gas is turned into a liquid for storage. Most heaters will turn the propane back into a gas to utilize its energy for heating purposes.

Propane is colorless but does have a distinct odor. However, you shouldn’t be able to smell it when using a heater. Because propane is highly flammable, it is kept in special containers and is released in a controlled environment by most applicable heaters.

The Mr. Heater Corporation is a convection model, which is one of the most traditional heating types used by devices since the Victorian era. In convection heating, warm air or liquid rises while cool substances sink. So, the propane heater will pull cold air across an internal heated filament or flame, causing the air’s temperature to increase. As this happens, the air rises and is pushed into a separate compartment where it is then released or pushed out by a fan.

In convection heating, the air itself is affected rather than nearby objects. People can feel the temperature difference and be warmed in a matter of minutes, making this style popular for all sorts of situations.

Pros and Cons


● Efficient – This heater has enough power to run for 21.5 hours, making it great for chilly mornings and evenings
● Adjustable – There are multiple settings to avoid overheating
● Stylish – The blue flames and modern design are a great addition to any décor
● Convection – The convection heating system is effective and doesn’t expose users to the propane
● Clean Burning – Propane doesn’t produce any smoke, so users don’t have to worry about inhaling the unhealthy substance


● Noisy – Sometimes the heater makes several loud bangs when trying to start up


The Mr. Heater Corporation Vent-Free Blue Flame Propane Heater is a great supplemental source for any home, apartment, or office. Besides being clean burning, the device can produce continuous heat for 21.5 hours on a single tank of propane, making it highly energy efficient. If you want to stay warm and save money, then this is the model for you.

Charles Jasper

Charles Jasper is the owner and main author of Home Climate Center. He has a degree in Engineering and 20 years experience on working on HVAC systems. He has a passion for everything related to home improvement and loves to travel. When he is not working, you might find Jasper working on projects around the house or organizing a camping trip.

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