10 Best Most Efficient Space Heater 2026 in the United States

The Dyson Hot+Cool AM09 is a bladeless tower heater designed for indoor use, suitable for bedrooms, home offices, or study rooms. Its distinctive bladeless design is not only modern-looking but also safer, especially around kids and pets, since there are no exposed heating elements or fast-spinning fan blades. It uses radiant heating combined with forced air, allowing it to quickly and evenly warm a room, and it also doubles as a cooling fan, making it useful year-round.

The heater offers two speed settings for adjustable comfort, though it might not be enough for users wanting more granular control. It runs quietly compared to traditional heaters, which helps maintain a peaceful environment. Weighing under 8 pounds and with its tower shape, it is fairly portable and easy to move between rooms. The unit is powered by corded electric input and includes basic control options, but lacks advanced features like smart connectivity or a programmable thermostat.

Energy-wise, while Dyson is known for efficiency, this model’s energy usage is typical for its category but may not be the most economical for larger spaces. It comes with a limited 90-day warranty, which is relatively short. This heater suits users seeking a stylish, safe, and quiet space heater that also offers cooling, ideal for small to medium rooms, but those needing extensive energy savings or advanced controls might find it somewhat limited.

The Rinnai EX08DTP is a direct vent wall furnace designed for indoor use with propane fuel, offering 8,000 BTU of heating power. It efficiently heats spaces up to about 1,600 square feet, making it suitable for medium-sized rooms like bedrooms or living areas. Its energy efficiency is strong, thanks to advanced modulating technology that adjusts heat output in fine increments, which helps save gas and maintain a steady, comfortable temperature between 60 and 80°F. The heater operates quietly, so it won’t cause distractions.

Safety is a key feature here: the unit has a cool-to-the-touch exterior, child lock, and self-diagnostic electronics that shut the system down automatically if problems occur. However, this heater is wall-mounted and weighs 53 pounds, meaning it isn’t portable like some freestanding heaters. Installation must be done by a certified professional, which adds to upfront cost and effort but ensures safety and proper function.

Control options include an electronic thermostat and timer settings, offering good flexibility for managing comfort. If you want an efficient, low-noise, and safe solution fixed to your wall and powered by propane, this Rinnai model could be a solid choice. But if you need a more portable or electric heater, or something simpler to install yourself, this might not be the best fit.

The Dyson Hot+Cool AM09 Jet Focus heater and fan is a versatile space heater designed for indoor use. Utilizing Air Multiplier technology, it delivers a smooth and uninterrupted airflow, which is great for both heating in winter and cooling in summer. It features ceramic plates that heat up quickly, offering a fast warming experience. The Jet Focus control allows you to switch between focused and diffused modes, making it adaptable for personal or whole-room heating and cooling, which adds to its efficiency.

Additionally, the sleep timer and remote control enhance convenience, while the smooth oscillation ensures even distribution of airflow within a 70° angle. The heater's tower form factor and lightweight design make it relatively easy to move around, though it is intended for indoor use only. Safety features like the cool-to-touch exterior and automatic shut-off add peace of mind.

However, it may not be the quietest option available, which could be a drawback for noise-sensitive users. The energy efficiency is decent, but some users might find it a bit pricey compared to other space heaters. Despite these minor cons, it is a stylish and functional choice for those who need a reliable heater and fan combo in one compact unit.