Natural gas heaters provide dependable heat for homes, garages, workshops, and greenhouses. Available as vent-free, natural-vent (B-vent), and direct-vent units, they can reduce electricity use but require correct installation and regular maintenance. Check local regulations, fuel prices, and install CO detectors.

Why choose a natural gas heater?

When winter arrives, many homeowners look for reliable, cost-effective ways to heat living spaces. Natural gas heaters are a common choice because they deliver steady heat and reduce reliance on electric resistance heating. In many parts of the U.S., gas delivers lower cost-per-BTU than electricity, which can translate to lower monthly heating bills - though fuel prices vary by region and season .

Where you can use gas heaters

Gas heaters are used in homes, garages, workshops, and greenhouses. There are models designed for whole-house systems, room heating, and light commercial or agricultural use. Portable propane units are also available for temporary or job-site heat.

Types of gas heaters

  • Vent-free (unvented): These release combustion products into the room and offer high efficiency for space heating. Some jurisdictions restrict or discourage their use in certain rooms because of indoor air-quality concerns - check local codes before installing 1.
  • Natural-vent (B-vent): These use convection to vent combustion gases through a vertical flue. They're common in older installations.
  • Direct-vent: These sealed systems draw combustion air from outside and vent directly outdoors, improving indoor air quality and safety.

Safety and maintenance

A gas heater can be safe when properly selected, installed, and maintained. Key steps:

  • Have appliances installed by a licensed technician.
  • Schedule annual combustion safety checks and cleanings.
  • Install and maintain carbon monoxide (CO) detectors and smoke alarms.
  • Follow manufacturer clearance and ventilation guidelines.
Improper installation, blocked vents, or lack of maintenance can create carbon monoxide risks or fire hazards.

Shopping tips and manufacturers

Look for Energy Star ratings (where applicable), clear venting options, and manufacturer support. Reputable manufacturers that offer residential and light-commercial gas heaters include Napoleon, Empire Comfort Systems, Harman, and Mr. Heater. Compare warranties, local dealer support, and spare-parts availability.

Final notes

Natural gas heaters remain a practical option for many households and outbuildings, offering reliable heat and potential operating-cost advantages compared with electric resistance heaters. Always confirm local fuel prices and installation rules before deciding, and prioritize certified installation and regular maintenance to keep systems safe and efficient 2.

  1. Confirm current average cost-per-BTU comparison between natural gas and electricity in the target region.
  2. Verify local and state regulations or restrictions for vent-free (unvented) gas heaters, including any state-specific prohibitions.
  3. Confirm the listed manufacturers (Napoleon, Empire Comfort Systems, Harman, Mr. Heater) still produce residential gas heaters and check current model availability.

FAQs about Natural Gas Heater

Are natural gas heaters cheaper to run than electric heaters?
Often, yes: natural gas commonly costs less per BTU than electricity, which can lower heating bills. Prices vary by region and over time, so compare local fuel rates before deciding .
Are vent-free gas heaters safe?
Vent-free heaters are efficient but release combustion products into the living space. They are safe when used per manufacturer instructions and in well-ventilated spaces, but some jurisdictions restrict their use. Check local codes and consider direct-vent units if in doubt .
What safety equipment should I install with a gas heater?
Install carbon monoxide detectors on every level, smoke alarms, and follow the heater manufacturer's clearance and ventilation recommendations. Annual professional inspections are recommended.
Can I use a gas heater in a greenhouse or garage?
Yes. Choose a model rated for the space and intended use, ensure proper ventilation, and follow any agricultural or local safety rules. For occupied spaces, prefer sealed-combustion (direct-vent) units.
How often should a gas heater be serviced?
Have a licensed technician inspect and service gas heaters at least once a year, or more often if the unit is used heavily or shows performance issues.