10 Best Energy Efficient Space Heaters 2026 in the United States

The Rinnai EX38DTP is a propane-powered direct vent wall furnace designed to heat indoor spaces up to about 1600 square feet with a strong heating capacity of 36,500 BTUs. It uses advanced modulating technology to maintain consistent warmth without cold spots, which helps improve energy efficiency by adjusting heat output precisely to your needs. This makes it a smart choice for those looking to reduce fuel consumption and save on heating costs.

Safety is a key focus here, with features like a cool-to-the-touch cabinet and self-diagnostic electronics adding peace of mind, especially for families with children. Because it’s wall-mounted and fairly compact, it saves floor space and fits well in places like bedrooms, offices, or garages. Noise is reported to be minimal, contributing to a quiet heating experience.

The unit weighs over 100 pounds and is fixed to the wall, so it is not portable and not suitable if you want a heater you can easily move around. It also lacks smart home connectivity, which might be a downside if you prefer controlling your heater remotely via apps. This heater provides steady, efficient heat safely in a fixed installation, making it ideal for homeowners or renters who want a reliable, low-maintenance heating solution but don’t require portability or smart controls.

The Rinnai EX22DTP is a propane-powered direct vent wall heater that offers strong heating capacity at 20,700 BTUs, suitable for spaces up to around 1,600 square feet. Its advanced modulating technology helps maintain a consistent, comfortable temperature while avoiding cold spots, making it a good choice for bedrooms, home offices, or studies. The unit emphasizes energy efficiency by adjusting fuel use to match your heating needs, which can help reduce heating costs over time.

Safety is well-covered, featuring a cool-to-the-touch exterior and self-diagnostic electronics, which is reassuring for families with children. Noise-wise, it operates quietly thanks to its fan and forced-air heating method, contributing to a peaceful indoor environment. Being wall-mounted and compact, it saves floor space and fits nicely in modern homes, although at 67 pounds it’s not something you'd move around frequently.

While it lacks portability compared to plug-in heaters, its programmable thermostat and smart tech integration (including Wi-Fi compatibility) add convenience for personalized temperature control. Installation requires professional setup due to its propane fuel type and direct vent system, which may add upfront costs. If you want an energy-efficient, safe, and quiet solution for heating medium-sized indoor spaces and don't mind a fixed heater, the Rinnai EX22DTP is a solid option with strong warranties on parts and labor.

The EdenPURE Classic CopperPLUS Infrared Heater is designed to efficiently warm large rooms up to 1000 square feet with its 1500-watt (about 5000 BTUs) radiant heating system. This makes it a good fit for people who want targeted heating in living rooms, bedrooms, or offices, helping to reduce energy use by focusing heat where it’s needed most. Its copper core technology improves heat transfer and maintains natural humidity, which can feel more comfortable than dry heat from some other heaters.

Safety is a strong point here, with features like cool-touch surfaces, automatic shut-off if tipped over, and dual sensors to prevent overheating—making it safer around children and pets. Noise levels are low, thanks to its quiet infrared operation, so it won’t be disruptive in quiet environments. Portability is well thought out with caster wheels and a remote control, allowing easy movement and convenient temperature adjustments.

The heater’s maximum temperature setting is modest at 90°F, which may not be sufficient for those needing very high heat in very cold conditions. Although the unit is energy-efficient for its type, it uses 12.5 amps, so it isn’t the cheapest option for continuous use. Its size (roughly 16 inches in all dimensions) means it takes up some floor space, which might be a consideration for smaller rooms. This heater combines effective, comfortable infrared warmth with important safety and convenience features, making it a solid choice for those looking to heat large rooms efficiently and safely without much noise.