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Sauna heaters

9kW sauna heaters

These 10 listings are recorded at 9kW, with electric heaters offering single-phase or three-phase connections. Most stated room ranges are 8–14m³, though some differ. The lowest-priced entry is a HUUM heat retainer accessory, not a complete heater. Complete heater listings start at £326.39 for the Helo Cup STJ.

By the zauna editorial team · Updated 3 October 2026

01 — Heaters compared

Heaters compared

Heaters compared
HeaterkWRoom (m³)ControlsPrice from
HUUM Heat Retainer of Heating Elements for DROP Electric Sauna Heater (pre 2024 models)Huum9kW——£48
Uniprodo 9 kW incl. control panel9kW—Separate panel£145
Sawo sauna heaterSawo9kW8–14—£300
Helo Cup STJ Electric Sauna Heater 9kW (3-Phase Only)Helo9kW9–14Built-in£326
HUUM DROP Electric Sauna HeaterHuum9kW8–15—£430
Electric Sauna HeaterHarvia9kW8–14Digital£500
Luna Outdoor Sauna with Changing Room9kW8–12—£500
Harvia Spirit of Löyly Electric Sauna Heater E XW Wi-FiHarvia9kW—App or Wi-Fi£559
Thermat Sauna Stove/Heater - Universal - Wall Mounted9kW10–15Built-in£581
Harvia Cilindro Plus Spot, with control unitHarvia9kW8–14—£738
Helo SKLE Digitally Mastered Commercial Sauna Heater ChromeHelo9kW8–24—£1040
Harvia Cilindro Sauna Heater 9kW - PC90XE - SteelHarvia9kW8–14Separate panel£1195
Wall IKI Electric Sauna HeaterIKI9kW——£1199
Saunum Experience 9kWSaunum9kW5–10Separate panel£2399
Saunum Pro Experience | Professional 9kW-15kW Sauna Heater UKSaunum9kW8–14—£2499
Barrel Sauna Edda9kW——£2870
IKI Original PlusIKI9kW20–30Manual£3100
Electric sauna heater - SAUNUM SPA SESSION 9 kwSaunum9kW——£3822
Harvia Virta Combi Series 9.0kW Steam Sauna HeaterHarvia9kW5–14Separate panel£4003
Harvia Spirit Series 9kW Sauna Heater Package, BlackHarvia9kW—App or Wi-Fi£4263

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02 — Key facts

Key facts

Heaters checked
20
Power range
9–9kW
Cheapest
£48

03 — Match the room range and electrical phase

Match the room range and electrical phase

Use the stated room volume for each listing rather than treating every 9kW heater as interchangeable. The HUUM DROP, Electric Sauna Heater, Harvia Cilindro Plus Spot and Harvia PC90XE each list 8–14m³. The Harvia Spirit of Löyly lists 6–14m³, while the Helo SKLE lists 8–24m³.

The two Helo Cup STJ entries differ slightly: one lists 8–14m³ and the explicitly named 9kW version lists 9–14m³. Both are recorded as three-phase. Check the specific listing when you narrow your choice.

The HUUM DROP, Harvia Spirit and Harvia PC90XE are recorded as single-phase. The Cilindro Plus Spot, Helo SKLE and Wall IKI are recorded as three-phase. No usable room-volume range is supplied for the Wall IKI, so this comparison cannot establish its room suitability.

04 — Compare controls and complete-heater prices

Compare controls and complete-heater prices

Choose controls alongside the heater, not just the power rating. The Helo Cup STJ has built-in controls; its explicitly named 9kW listing also specifies a timer. The HUUM DROP lists manual controls, while the Harvia Spirit lists Wi-Fi.

The Harvia PC90XE includes a digital control panel. The Cilindro Plus Spot lists a wireless Harvia Spot control switch and starts at £738. A Wi-Fi control unit is available for the Wall IKI, but the record does not say it is included.

Keep the HUUM heat retainer separate from your heater price comparison. It is listed for DROP models made before 2024.

05 — Frequently asked questions

Frequently asked questions

Not sure what size you need?

Work out the right kW for your room from its size, insulation and glass.

Heater size calculator