Best Blue Flame Propane Heater With Thermostat

Blue flame propane heaters with thermostats deliver efficient, even heat for garages, cabins, sunrooms, and additions. Below is a quick comparison of five vent-free blue flame models that include thermostat control or thermostatic operation to maintain set temperatures and improve fuel efficiency.

Model	BTU	Coverage	Thermostat	Brand
Mr. Heater MHVFBF20LPT	20,000	Up To 700 Sq. Ft.	Yes (Included)	Mr. Heater
ProCom ML100TBA-B	10,000	Up To 500 Sq. Ft.	Yes (High/Med/Low)	ProCom
Dyna-Glo Signature 20,000	16,000–20,000	Up To 700 Sq. Ft.	Thermostatic Operation	Dyna-Glo
Mr. Heater MHVFGH30LPBT	30,000	Up To 1,000 Sq. Ft.	Yes (Included)	Mr. Heater
Dyna-Glo 30,000	24,000–30,000	Up To 1,000 Sq. Ft.	Variable Heat (Thermostatic)	Dyna-Glo

Mr. Heater MHVFBF20LPT 20,000 BTU Blue Flame Vent Free Propane Heater

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The Mr. Heater MHVFBF20LPT is a 20,000 BTU vent-free blue flame wall heater designed to heat spaces up to 700 sq. ft. It features a built-in thermostat for accurate temperature control and a battery-powered electronic ignition for simple startup. The unit is rated to operate reliably at elevations up to 4,500 ft, which helps maintain performance in higher-altitude installations.

Key safety equipment includes an automatic low oxygen shut-off system (ODS), a factory-standard feature that stops operation if oxygen levels fall below safe thresholds. Fuel consumption is listed at approximately .926 lbs per hour at maximum output. The design is intended for indoor vent-free installation in living areas or cabins where vent-free heaters are permitted.

ProCom ML100TBA-B Ventless Propane Blue Flame Space Heater

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The ProCom ML100TBA-B is a compact 10,000 BTU blue flame ventless heater suited for smaller areas up to 500 sq. ft. It includes thermostat control with High/Medium/Low settings that allow manual modulation of heat output and can be mounted on a wall or placed on the floor with included base feet.

This model emphasizes a slim, modern profile for tighter spaces and provides a simple thermostatic control scheme for maintaining comfort without frequent adjustment. The unit is positioned for home and office use where a smaller, thermostatically controlled blue flame heater is needed and where vent-free operation is compliant with local codes.

Dyna-Glo Signature Series 20,000 BTU Liquid Propane Blue Flame Heater

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The Dyna-Glo Signature 20,000 is a vent-free blue flame wall heater with adjustable output from 16,000 to 20,000 BTU, intended to heat spaces up to 700 sq. ft. The blue flame technology convects heat into the room similarly to central heating, providing even distribution rather than focused radiant heat.

This unit is liquid propane ready and designed for vent-free indoor installation where permitted. Thermostatic control enables automatic temperature regulation, and the variable output helps match heat to room size and insulation levels. No fuel conversion is permitted for this model.

Mr. Heater MHVFGH30LPBT 30,000 BTU Vent Free Blue Flame Garage Heater

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The Mr. Heater MHVFGH30LPBT produces up to 30,000 BTU and is sized for larger areas such as garages, workshops, or large cabins up to 1,000 sq. ft. It includes a thermostat and battery-powered electronic ignition for straightforward operation and temperature regulation.

The unit is designed to function effectively at elevations up to 4,500 ft and includes an automatic low oxygen shut-off system (ODS) for safety in vent-free installations. Intended for heavier-duty heating needs, this model lists extended run-time figures at rated BTU levels and is targeted at spaces where robust, thermostatically controlled heating is required.

Dyna-Glo 30,000 BTU Liquid Propane Blue Flame Vent Free Wall Heater

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The Dyna-Glo 30,000 vent-free wall heater offers variable output from 24,000 to 30,000 BTU, suitable for up to 1,000 sq. ft. The blue flame convection design distributes heat evenly, aiming to mimic the circulation of a central heating system in auxiliary spaces.

This model is liquid propane ready and designed for wall mounting. Variable heat output combined with thermostatic control enables steady temperature maintenance across larger rooms. As with other vent-free heaters, installation must comply with local codes and include appropriate clearances and ODS safety considerations.

Buying Guide: Choosing A Blue Flame Propane Heater With Thermostat

Selecting the right blue flame propane heater with a thermostat requires attention to space, safety, and installation constraints. Below are the key considerations to compare models objectively.

Heating Capacity And Room Size

• BTU Rating: Match BTU output to room square footage and ceiling height. As a rule of thumb, 20,000 BTU typically suits up to 700 sq. ft., while 30,000 BTU models can handle up to 1,000 sq. ft.
• Insulation and Windows: Poorly insulated or drafty spaces need more BTU capacity than well-insulated rooms of the same size.

Thermostat Type And Control

• Built-In Thermostats: Electronic thermostats maintain set temperatures automatically and improve fuel efficiency vs. manual-only control.
• Variable Settings Versus Steps: Some units offer continuous thermostatic control; others use High/Medium/Low steps. Continuous or digital thermostats give finer control.

Vent-Free (Blue Flame) Considerations

• Local Codes And Permits: Vent-free heaters are restricted or regulated in some jurisdictions. Verify local building codes and manufacturer installation instructions before purchase.
• Indoor Air Quality: Blue flame vent-free heaters release combustion products into the room. Ensure proper room size, avoid prolonged use in tightly sealed spaces, and follow ODS guidance.

Safety Features

• Oxygen Depletion Sensor (ODS): An automatic shutoff that protects against low-oxygen conditions is essential for vent-free indoor heaters.
• Certifications: Look for CSA or equivalent safety certifications and manufacturer instructions for clearances and placement.

Fuel Type And Conversion

• Liquid Propane Ready: Many models are specifically set for LP; some units may not allow conversion to natural gas. Confirm fuel compatibility before buying.
• Fuel Consumption: Higher BTU units consume more fuel per hour. Evaluate run-time expectations and tank size for your needs.

Installation And Mounting

• Wall Mount Versus Floor Placement: Decide whether wall-mounted or floor placement better suits your space. Check included mounting hardware and clearances.
• Elevation Ratings: If you’re above a few thousand feet in altitude, select a model rated for higher elevations to maintain performance.

Distribution And Comfort

• Blue Flame Convection: Produces even room heating through convection, preferable for whole-room comfort compared with radiant-only designs.
• Built-In Blowers: Some larger models include blowers to distribute heat more quickly; consider this for larger or irregularly shaped spaces.

Maintenance And Support

• Serviceability: Confirm availability of replacement parts and access to service information. Regular inspection of burners and sensors is recommended.
• Warranty And Documentation: Check warranty terms and installation guides to ensure long-term support.

Comparison Perspectives

• Small Rooms: For bedrooms or offices, a compact 10,000 BTU unit with simple thermostatic steps (like the ProCom ML100TBA-B) may be adequate and economical.
• Medium Rooms: For living rooms or sunrooms up to ~700 sq. ft., 16,000–20,000 BTU models with built-in thermostats (Mr. Heater 20k or Dyna-Glo 20k) balance output and efficiency.
• Large Spaces And Garages: For large garages or workshops, 24,000–30,000 BTU models (Mr. Heater 30k or Dyna-Glo 30k) provide the capacity needed and often include features like blowers and higher elevation ratings.

When reviewing models, weigh BTU capacity, thermostatic control type, safety features, and local code compliance. Properly sized and installed, a blue flame propane heater with a thermostat offers steady, efficient comfort for many indoor auxiliary spaces.