10 Best Wall Mounted Gas Heaters 2026 in the United States

The Rinnai EX38DTWN is a wall-mounted natural gas heater designed for indoor use, offering a powerful heating capacity of 38,400 BTU that can comfortably warm up to about 1,600 square feet. Its direct vent system helps maintain safe indoor air quality by venting combustion gases outside, which is a great feature for homes concerned about ventilation. One of the heater’s standout points is its energy efficiency; it uses modulating technology to adjust heat output to exactly what’s needed, helping reduce fuel use and potentially lowering heating costs.

The built-in programmable thermostat adds convenience, allowing you to set temperatures that match your daily routine, and it even supports Wi-Fi integration for smart control. Safety-wise, the heater has a cool-to-the-touch cabinet and self-diagnostic electronics, which are important features for families and anyone wanting peace of mind. Its compact size (about 12.6" by 26.4") and sleek white design make it suitable for modern homes without taking up much space.

On the downside, the unit is fairly heavy at 108 pounds, so installation likely requires professional help. While it’s quiet in operation, it runs on natural gas only, so it may not suit homes without gas lines. Also, it’s mainly intended for indoor spaces like bedrooms or home offices rather than large open areas. For those seeking a reliable, efficient heater with smart controls and strong safety features for a medium-sized indoor area, the Rinnai EX38DTWN is a solid choice.

The Rinnai EX38CTN Space Heater Wall Furnace is a solid choice for those needing a powerful and efficient heating solution. With a heating capacity of 38,400 BTU, it can comfortably heat large spaces up to 3,840 square feet, making it suitable for homes, apartments, and even commercial settings. It boasts energy-efficient features such as a seven-stage modulating gas valve and a variable speed inducer motor, which help in maintaining consistent and cost-effective heating.

The electronic spark ignition and electronic thermostat, which ranges from 60°F to 80°F, offer precise control over the heating process. Additionally, its direct vent design ensures safe and efficient operation by expelling combustion gases directly outside. Safety is another strong point with this furnace, featuring child lock and self-diagnostic electronics that provide auto shutdown codes and automatic restarts in case of ignition or combustion failure. These features ensure peace of mind, especially in homes with children.

The design includes timer settings for added convenience and a relatively compact size that can be wall-mounted, saving floor space. However, it's worth noting that this model has been discontinued, and potential buyers might need to look at the new model, EX38DTN, for updated features and support. The heater's weight of 88 pounds means it requires proper installation support, and assembly is needed.

The Rinnai EX17DTN is a solid choice for anyone needing a reliable indoor wall-mounted natural gas heater. Its 17,000 BTU heating capacity is suitable for moderately sized rooms like bedrooms, offices, or studies, efficiently warming up to about 1,600 square feet. It uses advanced modulating technology to maintain steady temperatures and avoid cold spots, which is great for consistent comfort. Energy efficiency is a strong point here — the heater adjusts its fuel use to match the heat you need, helping lower gas consumption without sacrificing warmth.

Safety features include a cool-to-the-touch cabinet and self-diagnostic electronics, making it a safe option for homes with kids. The programmable thermostat allows you to set personalized temperature schedules, and it can connect with Wi-Fi systems for convenient control. The heater’s compact, beige design fits well in modern homes and urban spaces, saving floor space by mounting on the wall. It operates quietly, adding to its appeal for living and working areas.

Weighing 67 pounds and sized reasonably (about 30" wide), it’s manageable for most wall installations. This heater effectively balances efficient heating, safety, and smart controls, making it a practical option for those seeking dependable indoor warmth with energy savings in mind.