Harvia
Harvia Moderna sauna heater
Harvia makes the Moderna in 3 sizes, from 4.5 to 8 kW, for saunas of 106 ft³ to 424 ft³. Slide to your room size to see which one fits, how fast it heats and what it needs from your fuse box.
Updated Oct 18, 2026
Output
4.5–8 kW
Rooms
106 ft³–424 ft³
Stones
55 lb
Sizes
3
Which size fits your sauna?
Your room's effective volume
230 ft³
Best fit: V60
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 |
|---|---|---|---|---|---|
| Moderna V45HVE454XEM | 4.5 kW | 106 ft³–212 ft³ | 55 lb | 40–55 min | $0.95 |
| Moderna V60HVE604XEM | 6 kW | 177 ft³–283 ft³ | 55 lb | 25–35 min | $0.91 |
| Moderna V80HVE804XEM | 8 kW | 247 ft³–424 ft³ | 55 lb | 20–30 min | $1.20 |
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
| Model | Supply | Current | Fuse / breaker | Cable |
|---|---|---|---|---|
| Moderna V45 | 1~ 230 V | 19.6 A | – | – |
| 3~ 400 V | 6.5 A | – | – | |
| Moderna V60 | 1~ 230 V | 26.1 A | – | – |
| 3~ 400 V | 8.7 A | – | – | |
| Moderna V80 | 1~ 230 V | 34.8 A | – | – |
| 3~ 400 V | 11.5 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
- Moderna V45€739 at esaunashop.com (2026-10-18)
- Moderna V60€739 at esaunashop.com (2026-10-18)
- Moderna V80€782 at esaunashop.com (2026-10-18)
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-harvia-moderna-black-v45xe-4-5-kwdealer · read 2026-10-18
- esaunashop.com/electric-sauna-heater-harvia-moderna-v60xe-6-kwdealer · read 2026-10-18
- esaunashop.com/electric-sauna-heater-harvia-moderna-black-v80xe-8-kwdealer · read 2026-10-18
Other heaters for the same rooms
Questions and answers
What size sauna does the Harvia Moderna heat?
Harvia rates the sizes for these rooms: Moderna V45 106 ft³–212 ft³; Moderna V60 177 ft³–283 ft³; Moderna V80 247 ft³–424 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 Harvia Moderna need?
It depends on the size and your supply: Moderna V45: 1~ 230 V: 19.6 A, 3~ 400 V: 6.5 A; Moderna V60: 1~ 230 V: 26.1 A, 3~ 400 V: 8.7 A; Moderna V80: 1~ 230 V: 34.8 A, 3~ 400 V: 11.5 A. A licensed electrician sizes the circuit from the heater's manual and local rules.
How long does the Harvia Moderna take to heat up?
In a well-insulated indoor room at the middle of each size's range, our heat model gives: Moderna V45 40–55 min; Moderna V60 25–35 min; Moderna V80 20–30 min to reach 176 °F. Outdoor saunas, glass and cold weather take longer.
How many stones does the Harvia Moderna take?
As stated by Harvia: Moderna V45 55 lb; Moderna V60 55 lb; Moderna V80 55 lb. Use the stone size the manual specifies and re-stack the stones at least once a year, replacing crumbled ones.