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Hive Flow
The HUUM HIVE Flow wood-burning sauna heater is one of the smartest and cleanest-burning heaters you’ll find on the market. It’s designed to make the most of every bit of firewood, pushing around 75% of the heat straight into your sauna instead of letting it disappear up the flue. Less waste, more heat — simple as that.
With its huge stone capacity, the HIVE Flow holds heat like a champion - with the two sizes holding 105kg and 150kg of stones respectively. Even after the fire’s gone out, you’ll keep getting beautiful, steady steam for over 30 minutes. That means longer, more relaxing sessions without constantly feeding the fire.
If you care about the environment but still want a proper, memorable sauna experience, this one ticks all the boxes. It produces just 346 mg/m³ of CO emissions (compared to 1000+ mg/m³ in many similar heaters) and only 25 mg/m³ of particulate matter — the lowest in its class.
Efficient, clean-burning, and built for a cracking good sauna session — the HIVE Flow is a ripper choice.
Compatible with either the Malby, Varvik or the Alvik Chimney Sets
Dimensions
Tech data
Heater
| 8.5kW | 8.5kW LS | 9.8kW | 9.8kW LS | |
|---|---|---|---|---|
| Sauna Room | 6–14 m³ | 6–14 m³ | 8–18 m³ | 8–18 m³ |
| Stone Capacity | 105 kg | 105 kg | 150 kg | 150 kg |
| Weight | 54 kg | 54 kg | 67kg | 73 kg |
| Height | 884 mm | 884 mm | 884 mm | 884 mm |
| Width | 450 mm | 450 mm | 526 mm | 526 mm |
| Depth | 493 mm | 613 mm | 586 mm | 706 mm |
| Firewood Max | 300 mm | 300 mm | 300 mm | 300 mm |
| Flue Diameter | 114 mm | 114 mm | 114 mm | 114 mm |
Safety Distances
| 8.5kW | 8.5kW LS | 9.8kW | 9.8kW LS | |
|---|---|---|---|---|
| A | 150 mm | 150 mm | 150 mm | 150 mm |
| B | 500 mm | 500 mm | 500 mm | 500 mm |
| C | 1000 mm | 1000 mm | 1000 mm | 1000 mm |
Useful Resources
Hive Flow - 8.5 kW (Mini) / Standard / With Stones (per capacity)
$4,258.00
SAUNA CALCULATOR
Use our sauna calculator to help you find which heater best suits your sauna space.
Customer service
Not sure which sauna suits your home? Call our expert team on 1800 439 737 for personalised guidance and support.
Warranty
All of our sauna products come with a warranty. Visit our warranty page for specific information.
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FAQs
Have a question ? We are here to help.
Can I install a sauna in a small space or apartment?
Certainly! We have a number of heaters that are perfect for smaller sauna rooms like the
Core and Drop heaters from Huum, or the Routa heater from Tulikivi.
Probably the most important thing to consider when choosing a heater where space is a premium is the heater’s safety distance, or how far it needs to be kept from
the wall.
In order to maximise the space you have for people in a smaller sauna you may wish to install a heat deflector on your heater to which halves the safety distance required on that side of the heater.
How do I choose the right size heater?
The size of the heater should be chosen based on the sauna room size and insulation. Choosing the right size is important. If the heater is too small, it will heat the sauna too slowly, it won’t provide enough steam, and it might burn out quicker. It is better to opt for a slightly too powerful heater with a thermostat. You need 1 kW of power to heat 1 m³ of the sauna room as a rule of thumb. The second important thing to consider is how the sauna room is insulated. If there are any uninsulated brick, tile, glass or log walls in the sauna room. An additional 1.5 m³ for each m² of such wall should be added to the sauna room size calculation. You can use our sauna calculator to find out the volume of your sauna room. If in doubt, please contact our friendly team, and we will help you find the perfect heater for your sauna!
What is the lifespan of the equipment?
With proper care, a good-quality sauna can last you 10–20 years, easy. Heaters and electrical components might need replacing
sooner depending on use, but overall they’re built to go the distance.
When will I receive my item?
When we have received your order, you will automatically receive an e-mail confirming your order. Orders made before MIDDAY (AEST) that are in stock will be picked, packed and shipped the same day. Delivery time is usually 2-4 working days to metro areas on the East Coast with TNT/Fedex, usually a day or two more for other capitals and rural areas.
Can I change or return my item?
Please see our Returns Policy linked at the bottom of the page, but long story short is yes you can! Our main conditions are that your purchase is unused and in its original package - from there if you contact us within 14 days of your delivery we can help you with a refund or guide you to a sauna package that mey be more to your spec.
