01 — Our picks
Our picks
| Heater | kW | Room (m³) | Shops | Price from |
|---|---|---|---|---|
| Harvia Olive Diabase Traditional Finnish Sauna Stones 20kg | 2.3kW | — | 2 | £28 |
| Harvia Vega Compact Small Sauna Heater Wall Mounted Stainless Steel | 4.5kW | 5–13 | 2 | £206 |
| Harvia Vega | 6kW | — | 2 | £307 |
| Harvia The Wall SW45E 4.5kW Sauna Heater | 4.5kW | 3–6 | 2 | £455 |
| HUUM Heat Retainer of Heating Elements for DROP Electric Sauna Heater (pre 2024 models) | 9kW | — | 1 | £48 |
| Harvia Spirit 6kW and 9kW + WiFi app control | 6kW | — | 1 | £50 |
| HUUM Drop Electric Sauna Heater | 4.5kW | 3–7 | 1 | £54 |
| Tylo Sense Sauna Heater Temp Limit Control 3 Pole (May 2018 onwards) | 8kW | — | 1 | £80 |
| Harvia M3 | 16.5kW | — | 1 | £109 |
| Uniprodo 9 kW incl. control panel | 9kW | — | 1 | £145 |
02 — Key facts
Key facts
- Heaters picked
- 10
- Cheapest
- £28
03 — Match the heater to your room
Match the heater to your room
Start with the listed room-volume range rather than the lowest price. Harvia The Wall SW45E has a 4.5kW rating and a range of 3–6m³. The HUUM Drop is also listed at 4.5kW, with a range of 3–7m³ and a starting price of £54.43.
The Harvia Vega Compact lists 4.5kW, a range of 5–13m³ and a starting price of £206. For a larger room, the HUUM HIVE lists 12kW and 12–25m³, from £145. These are the entries with usable room-volume ranges in this selection. Where a range is missing, you cannot establish room suitability from this record alone.
04 — Check what the listed price covers
Check what the listed price covers
The cheapest entry, at £28, is Harvia Olive Diabase sauna stones, not a heater. The HUUM heat retainer is an accessory for pre-2024 DROP models. Harvia Spirit has duplicate listings, both from £49.99 with WiFi app control. Treat these as listed starting prices, not confirmed complete-system costs.
Controls also distinguish the options. The Wall needs a separate control unit, sold separately, and the HIVE requires a separate unit. Uniprodo lists a control panel included at £145, while the £179 KOVE lists mechanical controls. Vega controls are not specified. Check the contents before you use a starting price as your full budget.
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