Mr. Heater Vent Free Blue Flame Propane Heater 20000 BTU
- 20,000 BTU heat output, propane
- Vent free, blue flame convection
- Thermostat control, wall mount hardware included
- Battery ignition, battery included
- 19.6 pounds, 20.28 x 25.51 inches
- 1 year limited warranty
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A wall-mounted vent-free propane heater with a thermostat, battery ignition and a low-oxygen shutoff. It is built for the wall, with no floor stand supplied.
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ASIN: B01DPZ5B3MModel: F299720Category: Propane Space Heaters
Overview
Mr. Heater builds this blue flame heater to hang on a wall with the included brackets. The burner warms the room by natural convection, and an oxygen depletion sensor is part of the safety setup.
A thermostat and an electronic ignition make it simple to run as supplemental heat, and the vent-free design needs no chimney. The limitation is mounting, because floor feet are not included and the listing is a wall-mount unit.
Who it's for
A living area, garage-side room or home office with a wall spot for the brackets suits this heater. Buyers who need a floor-standing model should look at one that includes feet.
Pros and cons
- Battery electronic ignition
- Low-oxygen safety shutoff
- Wall mounting brackets included
- Vent free design
- Floor feet not included
- Wall mount only
- Heating coverage unit unclear
Performance notes
A clean-burning blue flame tube circulates warm air, and the thermostat cycles the burner to hold the set temperature. The sensor shuts the heater off in low oxygen. A battery supplies the electronic ignition.
Specifications
| Brand | Mr. Heater |
|---|---|
| Model | F299720 |
| Dimensions & fit | |
| Item weight | 19.6 pounds |
| Item Dimensions D x W x H | 11.42 inches D x 20.28 inches W x 25.51 inches H |
| Capacity & performance | |
| Heating Method | Convection |
| Heat Output | 20000 BTU |
| Power & efficiency | |
| Fuel Type | Propane |
| Compatibility & installation | |
| Mounting Type | Wall mount |
| Included components | |
| Included Components | Wall mounting hardware |
| Warranty & support | |
| Warranty Description | 1 year limited |
| Other details | |
| Indoor Outdoor Usage | Indoor |
| Special Features | Low-oxygen safety shutoff |
| Ventilation | Vent free |
Closest rivals on specs
ProCom ML300HBA-B Ventless Blue Flame Propane Heater- Item Weight 19.6 vs 26 pounds (-25%)
- Max Temperature Setting 900 vs 120 °F (+650%)
GASLAND Flame Jet Propane Forced Air Heater 125000 BTU- Item Weight 19.6 vs 13 pounds (+51%)
- Max Temperature Setting 900 vs 140 °F (+543%)
Frequently asked questions
How do I light the Mr. Heater F299720?
It has a battery-powered electronic ignition, and a battery is included. The listing gives no step-by-step instructions.
Does the Mr. Heater F299720 need electricity?
No. It runs on propane, with a battery for the ignition.
Can the Mr. Heater F299720 sit on the floor?
The description says feet for floor mounting are not included.
Does the Mr. Heater F299720 have a safety shutoff?
Yes. It has a low-oxygen shutoff, an oxygen depletion sensor.