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Mr Heater

Mr. Heater 20000 BTU Vent Free Blue Flame Dual Fuel Heater

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

20,000 Btu

Output heats spaces up to

Dual Fuel

Design supports LP or natural

Integrated Electronic

Spark ignition for starting the

Onboard Thermostat

Temperature control

Factory-installed Low

Oxygen Safety System adds protection

$249.99
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SKU: WX2*0748412

Overview

Designed as a supplemental heat source, this vent-free blue flame heater is built to warm spaces up to 700 sq. ft. with either LP or natural gas. It includes electronic spark ignition, thermostat control, and a fail-safe fuel type selector knob for straightforward operation and temperature adjustment. The unit uses natural convection to circulate warm air and comes with feet plus wall-mount hardware for flexible placement. A factory-installed Low Oxygen Safety System and two-step fuel connection process add practical safeguards without adding complexity.

Why Hunters Choose the Mr Heater

20,000 Btu

Output heats spaces up to

Dual Lp/ng

Compatibility adds fuel flexibility for

Integrated Electronic

Ignition simplifies startup

Onboard Thermostat

Supports more precise temperature control

Includes Mounting

Feet and wall hardware for

Key Features

  • 20,000 BTU output heats spaces up to 700 sq. ft.
  • Dual fuel design supports LP or natural gas use.
  • Integrated electronic spark ignition for starting the heater.
  • Onboard thermostat provides temperature control.
  • Factory-installed Low Oxygen Safety System adds protection.
  • Includes mounting feet and wall-mount hardware.
  • Two-step fuel connection helps prevent wrong-fuel hookup.

Best Used For

  • Supplemental heat for hunting cabins, garages, or outbuildings up to 700 square feet.
  • Users wanting thermostat-controlled warmth with electronic ignition and simple startup.
  • Installers needing included feet and wall-mount hardware for flexible placement.
  • Owners who want dual LP/NG compatibility with a fail-safe fuel selector knob.
  • Spaces where a vent-free blue flame heater fits the heating setup.

Specifications

Blue FlameYes
Btu20000
Convection HeatingNatural convection properties
Fail Safe Fuel Type Selector KnobYes
Feet Includedtrue
Fuel ConnectionTwo-step fuel connection process
Fuel TypeDual LP/NG
Heating Coverageup to 700 sq. ft.
IgnitionBattery operated electronic spark ignition
Mounting Hardware Includedtrue
Safety SystemDual Low Oxygen Depletion Systems
ThermostatThermostat control
Vent Freetrue

Pros

  • 20,000 BTU output heats spaces up to 700 sq. ft.
  • Dual LP/NG compatibility adds fuel flexibility for supplemental heating.
  • Integrated electronic ignition simplifies startup.
  • Onboard thermostat supports more precise temperature control.
  • Includes mounting feet and wall hardware for installation options.
  • Factory-installed Low Oxygen Safety System adds an extra safety feature.

Considerations & Trade-offs

  • Designed as a supplemental heat source rather than a whole-home solution, so it is best matched to targeted spaces up to the stated 700 sq. ft. coverage.
  • Vent-free operation means installation and use should be planned around the room layout and ventilation requirements of the space.
  • The unit is built around dual LP/NG use, so fuel setup and the fail-safe selector knob need to be matched carefully to the intended gas supply.
  • Temperature control is provided by the onboard thermostat and electronic ignition, which adds convenience but also means the heater depends on battery-operated spark ignition.

Suggested Comparisons

  • Vent-free blue flame heaters
  • Dual-fuel supplemental heaters
  • Wall-mounted space heaters
  • Portable propane/natural gas heaters

Suggested Accessories

  • Wall mounting hardware
  • Mounting feet
  • Fuel connection fittings
  • Replacement batteries

Frequently Asked Questions

What fuel types does this heater support?

The product is a dual fuel vent free heater and is listed as supporting LP/NG. It also includes a fail-safe fuel type selector knob and a patented two-step fuel connection process to help prevent wrong-fuel hook-up.

How much area can it heat?

The provided specifications say it heats up to 700 sq. ft. Actual results will depend on the space and conditions, but that is the only coverage figure given.

Does it need a vent?

It is described as a vent free heater, so no vent is indicated in the product data provided.

What controls and ignition features are included?

It includes integrated electronic ignition, a battery operated electronic spark ignition, and an onboard thermostat for temperature control.

What comes with the heater for installation?

The listing says mounting feet and wall mounting hardware are included.