Helo
Helo Vienna sauna heater
The Helo Vienna is a 4.5 kW heater that Helo rates for saunas of 106 ft³ to 212 ft³. Check it against your room, see how fast it heats and what it needs from your fuse box.
Updated Oct 18, 2026
Output
4.5 kW
Rooms
106 ft³–212 ft³
Stones
31 lb
Sizes
1
Which size fits your sauna?
Your room's effective volume
159 ft³
Best fit: 45STS
Work out your effective volumeEffective volume = inside volume, plus 1.2 m³ for every m² of glass, tile or stone; × 1.5 for solid log walls (Harvia's rule, used by most planners).
Sizes and specifications
| Model | Output | Room range | Stones | Heat-up | Per session |
|---|---|---|---|---|---|
| Vienna 45STS | 4.5 kW | 106 ft³–212 ft³ | 31 lb | 30–40 min | $0.85 |
Heat-up and cost are our heat model's estimate for each size in a room at the middle of its range: indoor, insulated walls, 68 °F around the sauna, heated to 176 °F, one hour of bathing, electricity at $0.18/kWh (United States average).
Electrical connection
| Output | three-phase 400 V (per phase) | single-phase 230 V |
|---|---|---|
| 4.5 kW | 6.5 A | 19.6 A |
Current is computed from the output; fuse and cable are shown where the maker or dealer states them. A licensed electrician sizes and installs the circuit following the heater's manual and local rules.
Where to see it
Prices and availability come from the shop or maker and change; their page is what counts. Shop offers are added as retailers join.
Sources
- esaunashop.com/electric-sauna-heater-helo-vienna-45sts-4-5-kwdealer · read 2026-10-18
Other heaters for the same rooms
Questions and answers
What size sauna does the Helo Vienna heat?
Helo rates the sizes for these rooms: Vienna 45STS 106 ft³–212 ft³. Use your room's effective volume: add 1.2 m³ for every m² of glass, tile or stone, and multiply by 1.5 for solid log walls.
What fuse or breaker does the Helo Vienna need?
It depends on the size and your supply: Vienna 45STS: 3~ 400 V: 6.5 A, 1~ 230 V: 19.6 A. A licensed electrician sizes the circuit from the heater's manual and local rules.
How long does the Helo Vienna take to heat up?
In a well-insulated indoor room at the middle of each size's range, our heat model gives: Vienna 45STS 30–40 min to reach 176 °F. Outdoor saunas, glass and cold weather take longer.
How many stones does the Helo Vienna take?
As stated by Helo: Vienna 45STS 31 lb. Use the stone size the manual specifies and re-stack the stones at least once a year, replacing crumbled ones.