Mr. Heater 20,000 BTU Vent Free Radiant Natural Gas Heater - F299821
Mr. Heater 20,000 BTU Vent Free Radiant Natural Gas Heater - F299821
This radiant 20,000 BTU natural gas vent free heater provides supplemental heating and heats up to 700 sq ft. It includes a thermostat for automatic temperature control and battery-powered electronic ignition.
The unit can be permanently mounted to a wall or fastened to the floor with the included mounting brackets and fasteners.
Radiant heat burner
Multiple burner tiles
Automatic low oxygen shut-off system (ODS)
Battery included
Shipping, returns & fit
Shipping is free on U.S. orders of $50 or more; orders under $50 ship for a flat $5.95. We currently ship to U.S. addresses only.
Orders are packed within 1–2 business days. Once shipped, delivery normally takes another 3–7 business days, and you'll receive a tracking link by email. Full details on our Shipping Policy.
You have 30 days from delivery to return any unworn item with tags in its original packaging. Return postage is paid by the buyer, unless your item arrived damaged, wrong, or never arrived — in those cases we replace it or refund you in full and cover the postage.
Approved refunds go back to your original payment method within 5–10 business days. See the full Refund Policy.
Most styles run S–3XL, with select pieces up to 6XL; bras in band sizes 34–48. For everyday smoothing pick your usual size; for firmer compression styles, size up for all-day comfort.
The exact fit for this piece is listed in the description above.
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