• Some stock photographs may show options that are not included. Please check product description.
Mr. Heater

20,000-Btu Vent-Free Radiant Natural Gas Heater

Mfg.#
F299821
Sku#
837153
  • 20,000 BTU per hour
  • For use with Natural Gas
  • Heats up to 500 sq. ft.
  • Radiant heat burner
  • Thermostat for automatic temperature control

* Estimated stock levels as of Fri, Mar 6, 2026. All items subject to prior sale. Prices may vary between stores and online. Please call ahead to confirm availability of items marked as Limited Stock.

Description

This Radiant 20,000 BTU Natural Gas 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. Multiple burner tiles utilize radiant heat, warming your space with the power of the sun. With a factory standard Oxygen Depletion Sensor (ODS), rest assured this heater will provide you with years of comfortable and safe heat.

Specifications

General

Automatic Shut-Off Yes
BTU 20,000
Color White
Coverage 700 Sq Ft
Fuel Type Natural Gas
Heat Type Radiant
Ignition Type Electric
Includes Feet and Wall Mount Hardware
Maximum Elevation 4,500
Safety Oxygen Depletion Sensor, High Limit Safety Shut-off
Thermostat Yes
Type Natural Gas Heater
Usage Supplemental heat in cold rooms

Dimensions

Height 27 in
Length 23.75 in
Weight 24.75 lb
Width 11.25 in

Manufacturing Details
The following information is subject to change without notice

Manufacturer Warranty 1 Year Limited
Prop 65 Warning Warning WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information visit www.P65Warnings.ca.gov

Please choose a store for pricing and availability.

Find Your Local Store
Feedback