Martin Natural Gas Direct Vent Thermostatic Heater 20,000 Btu
Best off-grid heating solution for homeowners seeking reliable, electricity-free warmth.
Experience efficient and reliable heating with the Martin Natural Gas Direct Vent Thermostatic Heater. This 20,000 Btu unit operates solely on natural gas, requiring no electricity for clean, economical warmth. Its sleek fireplace design features an exclusive glass ceramic viewing window, adding aesthetic appeal to any space. Easily manage your comfort with the built-in low-to-high dial thermostat. Designed for straightforward installation and certified for safety in the USA and Canada, it offers a low-maintenance heating solution.
$1199.00
Owner Satisfaction
4.6
/ 5
Category Rank
90
/ 1172
#90 in Fireplaces
Price vs Category Average
-40%
Below average
Heat Output
20000
/ , Btu
Who it's for
- Safety-conscious homeowners prioritizing clean indoor air quality
- Users wanting automated, hands-off temperature management
- People needing reliable supplemental heat for specific living spaces
Who should skip it
- Users needing to heat large, open-concept floor plans evenly
- DIY beginners lacking experience with exterior wall modifications
- Aesthetic-focused homeowners concerned about permanent wall and exterior changes
Performance breakdown
Heating Efficiency
Direct vent technology ensures maximum heat retention within your living space.
Installation Simplicity
Straightforward wall-mount design makes setup manageable for most handy homeowners.
Operational Reliability
Independence from electrical grids provides consistent warmth during unexpected power outages.
Temperature Control
Manual dial thermostat offers basic, tactile adjustments for personalized comfort levels.
Build Quality
Die-cast aluminum and ceramic glass provide a durable, premium-feeling construction.
Maintenance Requirements
Minimal moving parts ensure long-term performance with very little upkeep needed.
Key Specs
Heat Output
20,000 Btu
Power Source
Natural Gas Only (Not for Propane)
Heating Method
Direct Vent Convection
Control Type
Manual Dial
Thermostat
Built-in Adjustable (Low - High)
Window Material
Glass Ceramic
Grill Material
Heavy-duty die-cast aluminum
Certifications
Certified for use in the USA and Canada
Features
- Provides 20,000 Btu adjustable heat output
- Operates without requiring electricity
- Built-in room thermostat for easy control
- Exclusive glass ceramic viewing window
- Safe, clean, and economical energy production
- Quick and easy installation process
- Low maintenance required
- Stylish fireplace aesthetic
What customers say
Users highly value the Martin Direct Vent Heater for its robust performance and efficiency, particularly in garages and workshops. The core appeal is the direct vent design, which delivers clean, safe heat without impacting indoor air quality, justifying the cost. The reliable thermostat consistently maintains the set temperature, warming spaces quickly and quietly. Heat output quality is described as superior and consistent, transforming cold areas into comfortable zones. While initial setup sometimes requires minor troubleshooting regarding the pilot light, the overall consensus praises this unit as a dependable, high-quality investment. It is strongly recommended for supplemental zone heating where safety and consistent efficiency are essential.
Know before you buy
No, this unit is completely independent of electricity. It uses a manual ignition system, making it a reliable heating source even during power outages.
No, this specific model is engineered exclusively for natural gas. It cannot be converted to propane, so please ensure you have a natural gas line available at your installation site.
The wall where you install the heater must be at least 4-1/2 inches thick and no more than 12-5/8 inches thick to accommodate the direct vent piping.
The heater features a manual dial that allows you to adjust the heat output from low to high. Once set, it will maintain your desired temperature level by modulating the burner output.
Yes, this is a direct vent heater, meaning it draws all combustion air from outside and exhausts all byproducts outside. This design keeps your indoor air quality clean and is certified for safe use in residential spaces in both the USA and Canada.
This heater is designed for low maintenance. We recommend an annual inspection of the vent termination and burner area to ensure there is no debris buildup, but otherwise, it requires very little ongoing attention.
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Ready to buy?
$1199