Harvia
Harvia The Wall sauna heater
Harvia makes the The Wall in 4 sizes, from 4.5 to 9 kW, for saunas of 106 ft³ to 494 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
4.5–9 kW
Rooms
106 ft³–494 ft³
Stones
44 lb
Sizes
4
Which size fits your sauna?
Your room's effective volume
230 ft³
Best fit: SW60
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 |
|---|---|---|---|---|---|
| The Wall SW45HSW450400, HSW450400M, HSWE450400 | 4.5 kW | 106 ft³–212 ft³ | 44 lb | 35–45 min | $0.91 |
| The Wall SW60HSW600400, HSW600400M, HSWE600400 | 6 kW | 177 ft³–283 ft³ | 44 lb | 20–30 min | $0.87 |
| The Wall SW80HSW800400, HSW800400M | 8 kW | 247 ft³–424 ft³ | 44 lb | 20–25 min | $1.17 |
| The Wall SW90HSW900400, HSW900400M, HSWE900400 | 9 kW | 283 ft³–494 ft³ | 44 lb | 20–25 min | $1.29 |
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 |
|---|---|---|---|---|
| The Wall SW45 | 1~ 230 V | 19.6 A | – | – |
| 3~ 400 V | 6.5 A | – | – | |
| The Wall SW60 | 1~ 230 V | 26.1 A | – | – |
| 3~ 400 V | 8.7 A | – | – | |
| The Wall SW80 | 1~ 230 V | 34.8 A | – | – |
| 3~ 400 V | 11.5 A | – | – | |
| The Wall SW90 | 1~ 230 V | 39.1 A | – | – |
| 3~ 400 V | 13 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
- The Wall SW45€328 at esaunashop.com (2026-10-18)
- The Wall SW45€328 at esaunashop.com (2026-10-18)
- The Wall SW45€461 at esaunashop.com (2026-10-18)
- The Wall SW60€343 at esaunashop.com (2026-10-18)
- The Wall SW60€343 at esaunashop.com (2026-10-18)
- The Wall SW60€472 at esaunashop.com (2026-10-18)
- The Wall SW80€494 at esaunashop.com (2026-10-18)
- The Wall SW80€538 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-the-wall-black-steel-sw45-4-5-kwdealer · read 2026-10-18
- esaunashop.com/electric-sauna-heater-harvia-the-wall-black-steel-sw45e-4-5-kwdealer · read 2026-10-18
- esaunashop.com/electric-sauna-heater-harvia-the-wall-sw45e-4-5-kwdealer · read 2026-10-18
- esaunashop.com/harvia-the-wall-sw45-4-5-kw-with-control-paneldealer · read 2026-10-18
- esaunashop.com/electric-sauna-heater-harvia-the-wall-black-steel-sw60-6-kwdealer · read 2026-10-18
- esaunashop.com/electric-sauna-heater-harvia-the-wall-black-steel-sw60e-6-kwdealer · read 2026-10-18
- esaunashop.com/electric-sauna-heater-harvia-the-wall-sw60e-6-kwdealer · read 2026-10-18
- esaunashop.com/harvia-the-wall-sw60-6-0-kw-with-control-paneldealer · read 2026-10-18
- esaunashop.com/electric-sauna-heater-harvia-the-wall-black-steel-sw80-8-kwdealer · read 2026-10-18
- esaunashop.com/harvia-the-wall-sw80-8-0-kw-with-control-paneldealer · read 2026-10-18
Other heaters for the same rooms
Questions and answers
What size sauna does the Harvia The Wall heat?
Harvia rates the sizes for these rooms: The Wall SW45 106 ft³–212 ft³; The Wall SW60 177 ft³–283 ft³; The Wall SW80 247 ft³–424 ft³; The Wall SW90 283 ft³–494 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 The Wall need?
It depends on the size and your supply: The Wall SW45: 1~ 230 V: 19.6 A, 3~ 400 V: 6.5 A; The Wall SW60: 1~ 230 V: 26.1 A, 3~ 400 V: 8.7 A; The Wall SW80: 1~ 230 V: 34.8 A, 3~ 400 V: 11.5 A; The Wall SW90: 1~ 230 V: 39.1 A, 3~ 400 V: 13 A. A licensed electrician sizes the circuit from the heater's manual and local rules.
How long does the Harvia The Wall take to heat up?
In a well-insulated indoor room at the middle of each size's range, our heat model gives: The Wall SW45 35–45 min; The Wall SW60 20–30 min; The Wall SW80 20–25 min; The Wall SW90 20–25 min to reach 176 °F. Outdoor saunas, glass and cold weather take longer.
How many stones does the Harvia The Wall take?
As stated by Harvia: The Wall SW45 44 lb; The Wall SW60 44 lb; The Wall SW80 44 lb; The Wall SW90 44 lb. Use the stone size the manual specifies and re-stack the stones at least once a year, replacing crumbled ones.