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Mr. Heater Vent Free 20K BTU Flame Propane Heater (Blue)

  • mfr: F299720
  • SKU: F299140
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  • Free standard shipping

    *Orders placed before 3 PM EST Mon - Thur will ship the same day. Orders placed beyond these hours will be shipped the next business day. Exclusions apply. See shipping policy

  • Free Local Pickup

    Please call for store stock availability.

    Requests made before 2:30 PM EST can be available for next-day pickup. Learn more

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Product highlights

  • 20,000 BTU per hour use with propane gas heater for spaces up to 500 sq. ft.
  • Blue flame burner for even convection heat
  • Quiet integrated blower for gentle circulation of heated air
  • Thermostat for automatic temperature control; Automatic low oxygen shut-off system (ODS)
  • Blower fan kit (f299200 sold separately) - available for 20k units and up only

Mr. Heater Vent Free 20K BTU Flame Propane Heater (Blue)

Stay comfortable through the coldest days of the year with Mr. Heater’s Blue Flame Propane Heater!

Designed for quality and convenience, the Blue Flame Heater has all the elements you need to find just the right level of warmth for the winter months. Instead of simply blasting heat, the Blue Flame comes equipped with a thermostat that gives you control over the temperature in your space. Operation is also user-friendly: you simply start the heater going with the battery powered electronic ignition; for added convenience, the battery is included! A versatile device, the Blue Flame can also be mounted to the wall or securely fastened to the floor; the brackets and fasteners required for this set-up are also included with the heater! Inside the heater, the blue flame tube burner utilizes the natural burn convection to evenly circulate warm, comfortable air. For added security, the Heater features an Oxygen Depletion Sensor (ODS) that automatically turns the system off in low oxygen situations or other hazardous scenarios.

If you want to keep your house nice and warm during the cold season without any of the usual inconvenience, then the Mr. Heater Vent-Free Flame Propane Heater is just the item for you!


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 or securely fastened to the floor with included mounting brackets and fasteners. 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.


Configuration Core
BTU 20,000 BTU
Fuel Type Propane
Color Blue


Customer Questions
No Questions


Returns are incredibly simple. Please log into your account, find your item you wish to return and follow the prompts to make a return. If you do not have an account, click here to find your order and make a return.
You will receive a full refund when you return an item in its original manufacturer’s packaging, undamaged and unmarked. If the item you are returning is priced at less than $35, you will be charged a 15% restocking fee. Please note you will not be refunded any shipping charges. 
You have 30 days to make a return. During the holiday season, from November 1 to December 31, we extend the return window to 60 days. 
If your order has been noticeably damaged in transit, we strongly recommend that you refuse delivery and notify us immediately. Claims for missing items or items damaged in transit must be made within 48 hours of delivery. If there is carrier damage, please contact [email protected] with your order number and a description of the damage. 
Oh no! Please contact our customer service team so we can resolve the issue immediately. You can call us on 1.800.221.0828, email us at [email protected], or send us a message here.  
We do not currently offer exchanges. Please return the item you purchased within 30 days and order what you’d like instead. 
If you ordered a kit, you must return all components and accessories to receive a full refund. 
If you ordered a product that included a free item, you must include the free item with your return. If not, your return will not be accepted and you will not receive a full refund. 
We currently only offer camera repairs at our Brooklyn store. The item must be dropped off and collected in person as we do not accept shipped items for repair. For more information, please call our Brooklyn store on 1.718.431.7900. 
Most items can be returned within 30 days for a full refund. Click here to read our full return policy. 

Shipping and Returns

Same Day Shipping

All orders placed by 4PM( EST), Monday through Thursday, and by 11AM (EST) on Friday, are shipped same day. Orders placed outside these times will ship the next business day. We do not ship internationally or to Puerto Rico, Guam and other US territories at this time. For more details click here.

Free Two-Day Shipping

We offer free expedited shipping on thousands of items within the continental USA (this does not include Alaska and Hawaii).

Flexible, Easy Returns

If you're not happy with your purchase for any reason, our flexible 30-day free return policy makes it easy to get a full refund. Click here to view our return policy.

Ratings and reviews


Mr. Heater Vent Free 20K BTU Flame Propane Heater (Blue) SKU: F299140

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