10 Best Sauna Heaters 2025 in the United States

The Finlandia/Harvia Club 10 Sauna Heater is designed for home saunas up to about 600 cubic feet, making it suitable for small to medium-sized sauna rooms. With a power output of 10kW running on a standard 240V single-phase connection, it provides sufficient heat to warm your sauna fairly quickly. One of its standout features is the Xenio digital control, which offers precise temperature and timer settings—this makes it easier to customize your sauna experience compared to simple manual controls.

Safety is generally well-handled, as with most modern sauna heaters, but you should still ensure proper installation by a professional to meet electrical and ventilation standards. The design is straightforward and functional, fitting well into most sauna interiors without being overly bulky or complicated. The heater is not discontinued, so support and replacement parts should be available.

This model has received positive reviews for reliable performance and ease of use. It ranks relatively low in sales and popularity, which might reflect limited market presence or competition from other brands. If you want a dependable, easy-to-control heater for a moderate-sized sauna, this model is worth considering, but if you have a larger sauna or want more advanced features, you might want to explore other options.

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.

The HUUM Hive 12 kW Sauna Heater is a well-rounded option for medium to large sauna rooms, specifically between 430 to 880 cubic feet. One of its standout features is the inclusion of WiFi control via the UKU system, allowing for easy remote operation and monitoring. The heater is designed with direct contact between the heating elements and the 550 pounds of olivine stones, which helps generate a long-lasting and mild heat.

The stainless steel construction ensures durability and resistance to high temperatures, making it a reliable choice for frequent use. Additionally, the internal air tunnel design speeds up the heating process by 25%, which can be a significant time saver and extends the heater's lifespan by reducing the strain on heating elements. The adjustable legs make installation relatively flexible, fitting various floor types and conditions.

However, the power output of 12 kW requires a substantial electrical setup, operating at 240V with a 50-amp single-phase requirement, which may necessitate professional installation and higher energy consumption. The heater's design is aesthetically pleasing with its rounded stones, but it may not fit all sauna room decors. This product is best suited for sauna enthusiasts who value robust construction, efficient heating, and modern control features.