See it at Harvia: KIP45B 4.5 kW 240VAC
Harvia's own page for the KIP45B 4.5 kW 240VAC. Not a paid link.
What size sauna heater do I need?
One sized for your room's volume. Makers rate each heater for a range of room sizes, and the 28 heaters here that list both an output and a room size run from 4.5 kW to 24.1 kW. The sizing guide explains how makers match the two.
Measure your room's volume and write it down before you look at any pick. Then read each heater's product page for the room range its maker states and keep only those that bracket your figure. Trim the rest with the maker, price and safety listing filters, follow the sizing guide for the arithmetic, and have a licensed electrician confirm the supply.
Picks by the numbers
Each pick is the product that comes first on one figure its maker publishes, with the next ones on that figure after it. Choosing which figures to rank by is our editorial choice; the order on each is the makers' own numbers. None is a judgement of quality, we have not tested these products, and whether we earn a commission on a product never decides a pick.
- Least heater output: Harvia KIP45B 4.5 kW 240VAC (Harvia lists: 4.5 kW); HUUM DROP 4 (HUUM lists: 4.5 kW). Next on this figure: Saunum Air 5 (5 kW); then Finnleo Designer-SL2 6.0 kW (6 kW) and Harvia KIP60W 6.0 kW 240V (6 kW), 4 more at this figure.
- Most heater output: Harvia Pro 20 ES wood-burning heater (Harvia lists: 24.1 kW). Next on this figure: HUUM HIVE 18 (18 kW); then Harvia M3 wood-burning heater (16.5 kW).
- Rated for the largest room: HUUM HIVE 18 (HUUM lists: 18–28 m³). Next on this figure: Harvia Pro 20 ES wood-burning heater (283–706 ft³); then HUUM HIVE 12 (12–18 m³) and HUUM HIVE Flow (8–18 m³).
- Longest stated warranty (on at least part of the product): Finnleo Designer-SL2 6.0 kW (Finnleo lists: 5 years parts (traditional sauna heater), residential; 2 years in-field labor + 3 years at-factory labor (non-commercial); commercial: 2-year parts-only). Among the 22 of 28 that list this figure. Next on this figure: HUUM CLIFF 6 (3 years (private use); 1 year (commercial use)) and HUUM CLIFF 9 (3 years (private use); 1 year (commercial use)), 15 more at this figure; then Saunum Air 5 (The warranty period of the sauna climate device when used in a private sauna is two (2) years) and Saunum Air 7 (The warranty period of the sauna climate device when used in a private sauna is two (2) years), 2 more at this figure.
Where to buy the picks
Harvia KIP45B 4.5 kW 240VAC
As an Amazon Associate we earn from qualifying purchases. Some links on this page are paid: if you buy after following one, the retailer pays Saunakivi (IPORA LLC) a commission. It costs you nothing extra, and it never changes the specifications we list.
Amazon
Sold via a marketplace listing — the seller may not be the brand or an authorized retailer.
HUUM DROP 4
Paid links · how this works
- Select Saunas
Amazon — with UKU Local control (Wood)
Sold via a marketplace listing — the seller may not be the brand or an authorized retailer.
See it at HUUM: DROP 4
HUUM's own page for the DROP 4. Not a paid link.
Harvia Pro 20 ES wood-burning heater
Paid links · how this works
See it at Harvia: Pro 20 ES wood-burning heater
Harvia's own page for the Pro 20 ES wood-burning heater. Not a paid link.
HUUM HIVE 18
Paid links · how this works
- Select Saunas
Amazon — WiFi UKU Control (Glass)
Sold via a marketplace listing — the seller may not be the brand or an authorized retailer.
See it at HUUM: HIVE 18
HUUM's own page for the HIVE 18. Not a paid link.
See it at Finnleo: Designer-SL2 6.0 kW
Finnleo's own page for the Designer-SL2 6.0 kW. Not a paid link.
Every match (28)
Filter the matches by price on the maker's site, warranty, safety listing and where to buy.
Showing 28 of 28
- Harvia KIP45B 4.5 kW 240VAC
Electric heater · Harvia
Harvia · electric · 4.5 kW · rated for 100–211 ft³ (about 2.8–6 m³, our conversion)
- No price on the maker's site
- On the maker's Amazon storefront
- HUUM DROP 4
Electric heater · HUUM
HUUM · electric · 4.5 kW · rated for 3–7 m³ (about 106–247 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- On the maker's Amazon storefront
- Saunum Air 5
Electric heater · Saunum
Saunum · electric · 5 kW · rated for 106–212 ft³ (about 3–6 m³, our conversion)
- No price on the maker's site
- The warranty period of the sauna climate device when used in a private sauna is two (2) years
- UL (UL 875, cert UL-US-2310119-2); CSA C22.2 No. 164 (UL-CA-2308849-2)
- Finnleo Designer-SL2 6.0 kW
Electric heater · Finnleo
Finnleo · electric · 6 kW · rated for 175–310 ft³ (about 5–8.8 m³, our conversion)
- No price on the maker's site
- 5 years parts (traditional sauna heater), residential; 2 years in-field labor + 3 years at-factory labor (non-commercial); commercial: 2-year parts-only
- ETL
- Harvia KIP60W 6.0 kW 240V
Electric heater · Harvia
Harvia · electric · 6 kW · rated for 170–300 ft³ (about 4.8–8.5 m³, our conversion)
- No price on the maker's site
- HUUM CLIFF 6
Electric heater · HUUM
HUUM · electric · 6 kW · rated for 5–9 m³ (about 177–318 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- On the maker's Amazon storefront
- HUUM DROP 6
Electric heater · HUUM
HUUM · electric · 6 kW · rated for 5–9 m³ (about 177–318 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- On the maker's Amazon storefront
- HUUM HIVE Mini 6
Electric heater · HUUM
HUUM · electric · 6 kW · rated for 5–9 m³ (about 177–318 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- On the maker's Amazon storefront
- HUUM STEEL 6
Electric heater · HUUM
HUUM · electric · 6 kW · rated for 5–9 m³ (about 177–318 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- On the maker's Amazon storefront
- HUUM CORE 6
Electric heater · HUUM
HUUM · electric · 6.5 kW · rated for 5–9 m³ (about 177–318 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- On the maker's Amazon storefront
- Saunum Air 7
Electric heater · Saunum
Saunum · electric · 7 kW · rated for 177–318 ft³ (about 5–9 m³, our conversion)
- No price on the maker's site
- The warranty period of the sauna climate device when used in a private sauna is two (2) years
- UL (UL 875, cert UL-US-2310119-2); CSA C22.2 No. 164 (UL-CA-2308849-2)
- HUUM DROP 7
Electric heater · HUUM
HUUM · electric · 7.5 kW · rated for 7–11 m³ (about 247–388 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- On the maker's Amazon storefront
- Harvia KIP80B 8 kW 240VAC
Electric heater · Harvia
Harvia · electric · 8 kW · rated for 251–424 ft³ (about 7.1–12 m³, our conversion)
- No price on the maker's site
- On the maker's Amazon storefront
- HUUM CLIFF 9
Electric heater · HUUM
HUUM · electric · 9 kW · rated for 8–13 m³ (about 283–459 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- On the maker's Amazon storefront
- HUUM CORE 9
Electric heater · HUUM
HUUM · electric · 9 kW · rated for 8–13 m³ (about 283–459 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- HUUM DROP 9
Electric heater · HUUM
HUUM · electric · 9 kW · rated for 8–13 m³ (about 283–459 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- On the maker's Amazon storefront
- HUUM HIVE Mini 9
Electric heater · HUUM
HUUM · electric · 9 kW · rated for 8–13 m³ (about 283–459 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- HUUM STEEL 9
Electric heater · HUUM
HUUM · electric · 9 kW · rated for 8–13 m³ (about 283–459 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- On the maker's Amazon storefront
- Saunum Air L 10
Electric heater · Saunum
Saunum · electric · 10 kW · rated for 283–494 ft³ (about 8–14 m³, our conversion)
- No price on the maker's site
- 2 years (private sauna)
- UL-listed; declared compliance with UL 875 and CSA C22.2 No. 164
- On the maker's Amazon storefront
- HUUM HIVE Mini 11
Electric heater · HUUM
HUUM · electric · 10.6 kW · rated for 10–16 m³ (about 353–565 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- On the maker's Amazon storefront
- HUUM HIVE 12
Electric heater · HUUM
HUUM · electric · 12 kW · rated for 12–18 m³ (about 424–636 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- On the maker's Amazon storefront
- Saunum Air L 13
Electric heater · Saunum
Saunum · electric · 13 kW · rated for 424–565 ft³ (about 12–16 m³, our conversion)
- No price on the maker's site
- 2 years (private sauna)
- UL-listed; declared compliance with UL 875 and CSA C22.2 No. 164
- HUUM HIVE 18
Electric heater · HUUM
HUUM · electric · 18 kW · rated for 18–28 m³ (about 636–989 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- On the maker's Amazon storefront
- HUUM HIVE Flow
Wood-burning stove · HUUM
HUUM · wood-burning · 9.8 kW · rated for 8–18 m³ (about 283–636 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- HUUM HIVE Wood 13
Wood-burning stove · HUUM
HUUM · wood-burning · 13 kW · rated for 6–13 m³ (about 212–459 ft³, our conversion)
- No price on the maker's site
- 3 years (private use); 1 year (commercial use)
- On the maker's Amazon storefront
- Harvia Legend 150 wood-burning heater
Wood-burning stove · Harvia
Harvia · wood-burning · 16 kW · rated for 6–13 m³ (about 212–459 ft³, our conversion)
- No price on the maker's site
- On the maker's Amazon storefront
- Harvia M3 wood-burning heater
Wood-burning stove · Harvia
Harvia · wood-burning · 16.5 kW · rated for 212–459 ft³ (about 6–13 m³, our conversion)
- No price on the maker's site
- On the maker's Amazon storefront
- Harvia Pro 20 ES wood-burning heater
Wood-burning stove · Harvia
Harvia · wood-burning · 24.1 kW · rated for 283–706 ft³ (about 8–20 m³, our conversion)
- No price on the maker's site
Prices are the price each maker's own site showed in US dollars on the date shown; the seller's page has the current price. Warranties and safety listings are the makers' own statements, cited on each product page. A price starting 'From' is the cheapest configuration a maker offers, which may leave out the heater or options. Every product here is sold by its maker on the maker's own site. Where a product page carries a paid link (to Amazon or another approved retailer), Saunakivi may earn a commission; no sort order or filter favours those products. We have not tested these products.