Mr. Heater Vent Free Blue Flame Propane Heater 20000 BTU

Overview

Mr. Heater's 20,000 BTU vent-free blue flame heater runs on liquid propane and adds a built-in thermostat to the larger radiant line, sized for spaces up to 700 square feet. Battery-powered ignition means it lights even without power.

Unlike the radiant tile burner in Mr. Heater's other 20,000 BTU model, this one uses a blue flame tube burner rated 99.9 percent efficient, spreading heat by convection instead of direct radiant warmth. Owners describe it as reliable backup heat during power outages, with the thermostat cycling the flame down rather than shutting off completely once the room reaches temperature.

• 20,000 BTU/HR output
• Heats spaces up to 700 sq ft
• 99.9% efficient blue flame burner
• Built-in thermostat, battery ignition

Who it's for

Good for an RV, cabin or home backup heat source where a propane tank is more practical than running gas lines, especially for anyone who wants a thermostat instead of a manual dial. Skip it if a rare build quality complaint from one reviewer would worry you more than the largely positive feedback.

Pros and cons

Specifications