Sauna Heater Sizing with SaunaSizer AI™

Buy from Sauna Marketplace for lowest price, US-based tech support, and free delivery:
DROP
HIVE
CLIFF
STEEL

Perfect Size Guarantee

Here's how to qualify...

  • Watch the video or use the chatbot to determine your adjusted volume and optimal heater size.
  • Buy it on SaunaMarketplace.com, pasting your chat or math into the checkout notes.
  • If the size isn't perfect, we'll pay for shipping and swap it out with a different size.

The returned heater must be in "as-new" condition with all parts and manuals.  

We'll need as much information and data as possible to improve SaunaSizer models.

SaunaSizer

Your Trusted HUUM Source

huum sauna heaters

HUUM Drop Electric Sauna Heater

$1,041.00$1,366.00
Water and heated stones are the essence of sauna.  Drawing inspiration from a single drop of water, the HUUM DROP is designed to elevate the beauty and performance of these core elements.  We think of HUUM DROP as a very functional piece of art, but it's also been a reward-winning heater in since 2013. And with the new heating element retainer, upgraded rocks, and integrated heat shields the HUUM DROP is better than ever.
Select options

HUUM HIVE Wood

$1,678.00$2,252.00
The rocks take center stage with the HUUM HIVE Wood.  Fusing substantial thermal mass with a sleek design, these stoves offer an impressive thermal mass for long-lasting, gentle heat and abundant steam. Whether choosing a model with inside or outside wood feeding, the HIVE Wood Series upholds HUUM's commitment to quality and durability in any sauna.
FOR HUUM HIVE ELECTRIC, CLICK HERE
Select options

HUUM Hive Electric Sauna Heater

$1,615.00$2,737.00
Hold down the heat in style with the HUUM HIVE Sauna Heater, the thermal titan that kicked off the 'Instagram Era' of modern saunas.  Once the massive stone capacity heats up, the HUUM HIVE emits a warmth so good you might mistake it for a traditional wood-burning sauna.  Ranging from 6kw to 18kw, the HUUM HIVE is a perfect choice for small, medium, and gym saunas.  All HUUM Heaters are CE Certified and rated for 230 (110c) for those who like it hot. LOOKING FOR HUUM HIVE WOOD?  CLICK HERE
Select options

HUUM Hive Electric Sauna Heater

$1,615.00$2,737.00
Hold down the heat in style with the HUUM HIVE Sauna Heater, the thermal titan that kicked off the 'Instagram Era' of modern saunas.  Once the massive stone capacity heats up, the HUUM HIVE emits a warmth so good you might mistake it for a traditional wood-burning sauna.  Ranging from 6kw to 18kw, the HUUM HIVE is a perfect choice for small, medium, and gym saunas.  All HUUM Heaters are CE Certified and rated for 230 (110c) for those who like it hot. LOOKING FOR HUUM HIVE WOOD?  CLICK HERE
Select options

HUUM HIVE Heat

$1,920.00$2,116.00
Created originally to comply with strict German regulations for reducing carbon emissions and improving efficiency in wood-burning stoves, the HIVE Heat now brings this advanced technology to a global market. The HIVE Heat achieves a lower flue gas temperature, transferring more heat into the sauna room and less escaping through the chimney. This design allows optimal heat utilization, offering a superior sauna experience while lessening the environmental impact.  The HUUM HIVE Heat is an advanced sauna stove designed with the environment in mind and boasting a 12kW power rating, making it ideal for sauna rooms sized between 212 to 459 cubic feet. Compared to the HUUM HIVE Wood series, the HIVE Heat features a more innovative airflow system and different materials, including a cast iron stove door focused on burning wood as cleanly and efficiently as possible.
Looking for the electric HUUM HIVE?  Click here.
Select options

HUUM STEEL Electric Sauna Heater

$1,230.00$1,866.00
Don't be deceived by the HUUM STEEL's minimalist elegance! This compelling electric heater carries an unexpected abundance of stones, delivering potent yet gentle, enduring warmth. Cleverly hidden within its streamlined design is a sturdy built-in air tunnel, promising swift and efficient heat, belying its compact form. Its stunning stainless steel shell provides a captivating contrast against the natural sauna stones, effortlessly elevating the aesthetic charm of your sauna room.
Select options

Still Not Sure?

  • All Electric Sauna Heaters For Sale
  • Best Electric Sauna Heaters (blog)
  • Buy HUUM
  • Buy Harvia
  • Buy Saunum

Sizing an Electric Sauna Heater

Manufacturers 'rule of thumb' guides for sizing electric sauna heaters range 1 KW for every 35 and 50 cubic meters of space.  We started training SaunaSizer with 1 KW for every 45 cubic feet and it has made thousands of adjustments based on real life tests.

But there's much more to consider.  Glass surfaces, stone walls, windows, and other uninsulated surfaces (including uninsuated walls) need to be factored in.  SaunaSizer uses thermal resistance of materials, climate data of the location, and user experiences to personalize recommendations.

The square footage of uninsulated space should be given an effective value between 5% and 50% higher, depending on the surface.  

The location also needs to be included if the sauna will be outdoors.  Cold climates like Canada, Alaska, Minnesota, and Finland require an additional 25% added to the entire calculation.  SaunaSizer determines this based on climate.