01 — Heaters compared
Heaters compared
| Heater | kW | Room (m³) | Controls | Price from |
|---|---|---|---|---|
| Helo Rondo 360 Degree Electric Sauna Heater GraphiteHelo | 6.5kW | 5–18 | Helo ra 19 | £4314 |
| Helo Hanko STJ Electric Sauna HeaterHelo | 8kW | 8–12 | — | £408 |
| Helo Cup STJ Electric Sauna Heater 9kW (3-Phase Only)Helo | 9kW | 9–14 | Built-in | £326 |
| Helo SKLE Digitally Mastered Commercial Sauna Heater ChromeHelo | 9kW | 8–24 | — | £1040 |
| Helo Elite Free Control PanelHelo | 17kW | — | — | £570 |
02 — Key facts
Key facts
- Heaters checked
- 5
- Power range
- 6.5–17kW
- Cheapest
- £326
03 — Match the heater to your room and supply
Match the heater to your room and supply
Start with your sauna’s volume and compare it with each listing’s stated range. The 6.5kW Rondo covers 5–18m³, while the 8kW Hanko STJ covers 8–12m³. Both are listed as single-phase electric heaters.
The two 9kW Cup STJ listings are three-phase. Their stated room ranges differ: one gives 8–14m³ and the listing marked “3-Phase Only” gives 9–14m³. Check the specific listing you intend to buy rather than treating these ranges as interchangeable.
The 9kW SKLE Digitally Mastered Commercial heater is also three-phase, with a listed room range of 8–24m³. It has the largest stated maximum room volume in this selection.
04 — Compare listed prices and controls
Compare listed prices and controls
Both Cup STJ listings start at £326.39. One lists built-in controls; the other specifies integrated controls and a timer. The Hanko STJ starts at £407.75.
The SKLE starts at £1,040.15 and lists Helo Digi 2, Helo Premium, Helo T2 and Helo Trend controls. The Rondo, in Graphite, starts at £4,314.01 and lists Helo RA 19 controls. Use these control details alongside the room range and phase when you compare your options.
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