Mr. Heater F260550 Big Maxx MHU50NG is perfect for large spaces needing reliable heating. This unit delivers powerful warmth, making those cold days more comfortable.
Plus, its compact design ensures it fits seamlessly into any garage without taking up too much space.
We tested durability, ease of use, and more to ensure you get the best performance from your heater.



Mr. Heater Big Maxx Natural Gas Heater
The adjustable valve sets the Mr. Heater F260550 Big Maxx MHU50NG apart from other natural gas heaters. With a powerful output of 50,000 BTU per hour, it effectively heats spaces up to 1,250 sq. ft. This unit is constructed from durable materials, featuring a robust powder-coated steel exterior and 316-grade stainless steel components that resist corrosion and ensure longevity. Its dimensions are compact, making it suitable for various installations.
Key Advantages
- The powered exhaust allows for both vertical and horizontal venting, providing flexibility in installation options.
Limitations
- Not compatible with propane without using the included conversion kit, which may require additional setup for some users.
This heater features easy outside access to the thermostat, A/C terminals, and gas connection, simplifying maintenance and operation. It requires a minimum clearance of 8 ft from the floor to the base of the heater, which should be considered during installation. The product comes with a limited 3-year warranty on parts and burners, and a 10-year warranty on defects in the heat exchanger, providing peace of mind for users.
Best for outdoor enthusiasts needing a reliable heating solution for garages, workshops, or large outdoor spaces, the Mr. Heater F260550 Big Maxx MHU50NG is a powerful and durable choice that excels in performance and versatility.
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Mr. Heater 30,000 BTU Vent Free Heater
The adjustable valve sets the Mr. Heater MHVFBF30NGT apart, allowing users to customize heat output according to their specific needs. This powerful gas wall heater boasts a robust construction with 316-grade stainless steel components, ensuring durability and resistance to corrosion. With dimensions of 24 inches in height, 30 inches in width, and a depth of 10 inches, it is designed for efficient space utilization.
Key Advantages
- The heater provides an impressive 30,000 BTUs of heat, effectively warming spaces up to 1,000 sq. ft., making it ideal for larger rooms or additions.
- Its blue flame burner technology offers efficient warmth, consuming only 0.030 MCF of natural gas per hour, ensuring energy efficiency.
- The built-in thermostat allows for precise temperature control, enhancing user comfort.
- Safety features include a low oxygen shut-off system (ODS), providing peace of mind during operation.
- The versatile design supports dual mounting options, whether wall-mounted or placed on the floor.
Limitations
- Not compatible with propane gas, limiting its use to natural gas installations only.
- Installation may require professional assistance for optimal safety and efficiency.
Best for outdoor enthusiasts needing a reliable heating solution for cold spaces, the Mr. Heater MHVFBF30NGT is a powerful and efficient choice for maintaining comfort in challenging conditions.
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Comfort Glow 17,000 BTU Gas Wall Heater
The adjustable valve sets the Comfort Glow 17,000 BTU Direct Vent Natural Gas Wall Heater apart from its competitors. This heater is designed to efficiently heat spaces up to 570 sq. ft., making it suitable for various indoor environments. Constructed with durable materials, it features a 430 stainless steel burner that ensures noise-free operation and longevity. The dimensions of the unit are 20 inches in height, 27.3 inches in width, and 6.5 inches in depth, allowing for a space-saving wall-mounted installation.
Key Advantages
- The sealed burn system enhances safety by preventing gas flow if the pilot light goes out, while the Matchless Piezo Ignition allows for easy lighting without matches.
Limitations
- Not compatible with non-vented systems, which may limit installation options in certain homes.
This heater is best for outdoor enthusiasts needing a reliable heating solution in spaces like garages, workshops, or well-ventilated rooms. Its direct vent capability allows for efficient heating without the need for electricity, making it an excellent choice for emergency heating during power outages. Overall, the Comfort Glow heater combines safety, efficiency, and versatility, making it a strong contender in the natural gas heating market.
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Mr. Heater Big Maxx 80,000 BTU Heater
The adjustable valve sets the Mr. Heater F260560 Big Maxx MHU80NG Natural Gas Unit Heater apart from its competitors. This feature allows for precise control of the heating output, making it suitable for various applications. Constructed from durable materials, this unit measures 29.33” L x 15.50” W x 26.37” H and delivers a powerful performance of 80,000 BTU, effectively heating areas up to 2000 sq. ft.
Key Advantages
- The 316-grade stainless steel construction resists corrosion, ensuring longevity in harsh environments.
Limitations
- Not compatible with liquid propane without the included conversion kit; users should note this before installation.
This heater features a powered exhaust that allows for both vertical and horizontal venting, enhancing installation flexibility. The spark ignition system, paired with a self-diagnostic control module, ensures reliable operation and safety. However, it’s essential to maintain a minimum clearance of 8 ft. from the floor to the base of the unit for optimal performance.
Best for outdoor enthusiasts needing efficient heating solutions for large spaces, the Mr. Heater Big Maxx is an excellent choice for garages or workshops where reliable warmth is essential. With a limited 3-year warranty on parts and burners, this unit provides peace of mind alongside its robust features.
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ProCom Vent Free Dual Fuel Stove
The adjustable valve sets the ProCom QNSD250RT Vent Free Dual Fuel Stove apart from its competitors. This feature allows users to precisely control the heat output, making it adaptable to various indoor environments. Constructed from 316-grade stainless steel, the unit is designed to resist corrosion, ensuring durability over time. With dimensions of 25” H x 33.5” W x 13” D and a weight of 49.8 lbs, it is compact enough for various indoor settings while still providing powerful heating capabilities.
Key Advantages
- The patented 25,000 BTU Dual Fuel Technology efficiently heats spaces up to 1,100 square feet, making it ideal for larger rooms.
Limitations
- Not compatible with external ducting or chimney systems, limiting its use to indoor environments only.
Best for outdoor enthusiasts needing a reliable and efficient heating solution for indoor spaces, the ProCom QNSD250RT excels in providing warmth without the hassle of venting. Its remote control feature enhances convenience, allowing users to maintain their desired temperature effortlessly. This model is particularly suitable for those who prioritize both functionality and style in their heating solutions.
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Faq about best natural gas non vented garage heaters:
1:What are non-vented garage heaters?
Non-vented garage heaters use natural gas to heat spaces without requiring external ventilation. They operate by burning gas and releasing heat directly into the garage.
2:Are non-vented garage heaters safe?
Yes, non-vented garage heaters are safe when used according to manufacturer guidelines. Ensure proper airflow and avoid using them in enclosed spaces.
3:What are the advantages of non-vented garage heaters?
Advantages include easy installation, no need for venting, and efficient heating. They provide immediate warmth and are generally more affordable than vented options.
4:How do I choose the best non-vented garage heater?
Consider factors like heating capacity, size of the garage, safety features, and energy efficiency ratings. Look for models with good reviews and warranties.
5:Can I use a non-vented heater in a residential garage?
Yes, but ensure that the garage is well-ventilated and that you follow all safety guidelines. Check local codes for compliance.
6:What maintenance do non-vented garage heaters require?
Regular maintenance includes cleaning the heater, checking for gas leaks, and ensuring proper operation. Follow the manufacturer’s maintenance schedule for best results.
Conclusion
Mr. Heater Big Maxx Natural Gas Heater stands out for its formidable heating capacity and efficient performance, making it an exemplary choice for expansive garage spaces. With its robust design and user-friendly features, it ensures optimal warmth and comfort.
On the other hand, the Mr. Heater 30,000 BTU Vent Free Heater excels in versatility and compactness, delivering substantial heat without the need for venting. Its economical operation and ease of installation make it ideal for smaller areas, providing a practical solution for homeowners seeking effective heating alternatives.