10 Best Sauna Heaters 2025 in the United States

The Harvia The Wall SWS60 is a well-designed 6kW sauna heater made from stainless steel, suitable for sauna rooms up to 282 cubic feet. Its direct rock-to-element contact ensures efficient heat distribution, and the smart design promotes good air circulation and steady warmth. The heater offers flexibility with right or left-handed installation options and can even be integrated into the sauna bench, making it versatile in terms of setup.

It includes an illuminated control panel for easy operation and built-in overheat protection for safety. The wall-mount design, stone protector, and integrated on/off, time, and temperature controls add to its convenience and functionality. The heater operates on 240V and requires a single-phase 25-amp connection, considerations to keep in mind for installation.

Designed and manufactured in Finland, it reflects high craftsmanship. Its weight of 75 pounds may make installation challenging. The stainless steel housing and durable construction promise a long lifespan, making it a solid choice for those looking for a reliable and efficient sauna heater.

The HUUM Hive 18 kW Sauna Heater is a powerful option for medium to large-sized saunas (between 640-1230 cubic feet). It features a stainless steel construction with direct contact between stones and heating elements, which helps create a longer and milder heat. The inclusion of 550 pounds of rounded olivine stones enhances durability and heat capacity, adding to the aesthetic appeal. The UKU WiFi control offers convenient remote operation, allowing users to adjust settings easily.

The internal air tunnel design shortens heating time by 25%, extending the life span of the heating elements and requiring fewer stones to fill the heater, making it efficient and cost-effective in the long run. Installation may require some attention due to the need for adjustable legs and specific wire sizes (AWG 8 + 8), which could be complex for some users. Safety features are not explicitly detailed, but stainless steel construction generally ensures reliability and durability.

The heater's design is sleek and modern, fitting well into any sauna setting. However, its best-seller rank of #941,525 in Patio, Lawn & Garden and #1,472 in Sauna Accessories suggests it might not be highly popular. Users looking for a durable, efficient, and aesthetically pleasing sauna heater with advanced control options will benefit most from this product, though they should be prepared for potentially complex installation requirements.

The HUUM Drop Series Sauna Heater stands out with its unique water drop design that allows for better contact between stones and heating elements, creating a gentler and longer-lasting heat. Made from stainless steel, this wall-mounted heater is built for durability and looks sleek in any sauna setup. It offers multiple power options from 4.5 kW to 9 kW, making it suitable for a range of sauna room sizes from about 106 to 530 cubic feet. This flexibility means you can choose the right heater size depending on your sauna’s volume.

One of its key features is the UKU WiFi control system, which lets you manage your sauna remotely via a phone app. This is convenient for setting heating schedules, adjusting temperature, and receiving notifications, ensuring the sauna is ready when you want it. The included sensors and control panel add to ease of use and safety.

Installation requires proper electrical setup, including specific wire sizes and circuit breakers depending on the power rating, so professional installation might be necessary if you’re not familiar with electrical work. The heater offers industrial-quality heating elements and a solid warranty for 5 years (except heating elements). This heater is an excellent option for those looking for a modern, efficient, and remotely controllable sauna heater that fits various sauna sizes. Its stylish design and advanced controls make it a good match for home or office saunas, but ensure your electrical system can handle the requirements before buying.