Helo
Helo Vienna STS Electric Sauna Heater
Helo Vienna STS Electric Sauna Heater
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Description
Description
The Vienna STS is a wall-mounted electric sauna heater for small and medium sized home saunas, supplied here in black with Helo’s WT water tank included. The tank sits among the heating elements and works as a passive evaporator, raising humidity so you can bathe gently at lower temperatures or run a classic hot sauna with the tank dry. Outputs of 4.5 kW, 6 kW and 8 kW cover rooms of 3–12 m³, each connecting to a single-phase or three-phase supply. Integrated controls include a 9 hour pre-selection timer, and a two-level stone space takes 12 kg of stones for faster heat-up or 20 kg for a softer steam. Stones are sold separately; Helo recommends smaller vulcanite stones under 10 cm.
Features
Technical Specification
| All models | |
| Dimensions (H × W × D) | 615 × 420 × 270 mm |
| Colour | Black |
| Controls | Integrated, with 9 hour pre-selection timer |
| Water tank | Helo WT passive evaporator (included) |
| Installation | Wall-mounted, flush to the back wall |
| Clearance to the ceiling | 1,200 mm |
| Clearance to the floor | 110 mm |
| Vienna 45 STS (4.5 kW) | |
| Recommended sauna room volume | 3–6 m³ |
| Weight without stones | 11.5 kg |
| Stone capacity | 12 kg |
| Clearance to the side walls | 40 mm |
| Clearance to the front | 60 mm |
| Cable and fuses, 400–415 V 3N~ | 5 × 1.5 mm²; 3 × 10 A |
| Cable and fuses, 230 V 3~ | 4 × 2.5 mm²; 3 × 16 A |
| Cable and fuse, 230–240 V 1N~ | 3 × 4 mm²; 1 × 20 A |
| Vienna 60 STS (6 kW) | |
| Recommended sauna room volume | 5–9 m³ |
| Weight without stones | 12 kg |
| Stone capacity | 12 or 20 kg (two-level stone space) |
| Clearance to the side walls | 60 mm |
| Clearance to the front | 80 mm |
| Cable and fuses, 400–415 V 3N~ | 5 × 1.5 mm²; 3 × 10 A |
| Cable and fuses, 230 V 3~ | 4 × 2.5 mm²; 3 × 16 A |
| Cable and fuse, 230–240 V 1N~ | 3 × 6 mm²; 1 × 35 A |
| Vienna 80 STS (8 kW) | |
| Recommended sauna room volume | 8–12 m³ |
| Weight without stones | 12 kg |
| Stone capacity | 12 or 20 kg (two-level stone space) |
| Clearance to the side walls | 80 mm |
| Clearance to the front | 100 mm |
| Cable and fuses, 400–415 V 3N~ | 5 × 2.5 mm²; 3 × 16 A |
| Cable and fuses, 230 V 3~ | 4 × 6 mm²; 3 × 25 A |
| Cable and fuse, 230–240 V 1N~ | 3 × 6 mm²; 1 × 35 A |
Installation
Installation and maintenance must be carried out by a certified electrician, with the electricity supply isolated at the fuse panel before any work begins. Under IEC 60364-7-703 and BS 7671:2018 an electric sauna heater does not have to be connected through an RCD, and for reliable operation Helo recommends that the heater supply is not run through one; other electrical devices in the sauna room should be RCD protected. A local point of isolation covering all live conductors is recommended. The connection cable is heat-resistant H07RN-F (60245 IEC 66), and the installation manual in the Downloads tab and local wiring regulations must be followed.
Helo WT water technology
The WT water tank sits among the heating elements and works as a passive evaporator, adding humidity to the sauna air. It allows three ways of bathing: a gentle sauna at 50–60 °C with enveloping steam and longer sessions, a flexi-sauna at 60–80 °C with more humidity at a lower temperature, or a classic hot sauna at 80–100 °C with the tank left dry. The gentle and flexi settings also suit bio-aroma or salt sauna use.
Sauna stones
Sauna stones are purchased separately. A smaller 12 kg fill heats the sauna faster, while the full 20 kg fill gives a softer, more enjoyable steam; Helo recommends smaller vulcanite stones under 10 cm.
Brand
Helo was founded in 1919 and was the first manufacturer of electric sauna heaters. Its heaters are still handcrafted in Hanko, Finland, and the company is part of the Sauna360 group.
Warranty
The warranty card is available in the Downloads tab.
Downloads
Delivery & Returns
Delivery
We offer fast and reliable delivery to customers across the UK and beyond. For full details on shipping times and costs, please review our delivery policy.
Returns
We offer hassle-free returns within 30 days of purchase, so you can shop with complete confidence. For details, see our returns policy.
Warranty & Quality Promise
We are committed to delivering products of the highest quality, for details surrounding warranty please contact us.
Description
The Vienna STS is a wall-mounted electric sauna heater for small and medium sized home saunas, supplied here in black with Helo’s WT water tank included. The tank sits among the heating elements and works as a passive evaporator, raising humidity so you can bathe gently at lower temperatures or run a classic hot sauna with the tank dry. Outputs of 4.5 kW, 6 kW and 8 kW cover rooms of 3–12 m³, each connecting to a single-phase or three-phase supply. Integrated controls include a 9 hour pre-selection timer, and a two-level stone space takes 12 kg of stones for faster heat-up or 20 kg for a softer steam. Stones are sold separately; Helo recommends smaller vulcanite stones under 10 cm.
Features
| All models | |
| Dimensions (H × W × D) | 615 × 420 × 270 mm |
| Colour | Black |
| Controls | Integrated, with 9 hour pre-selection timer |
| Water tank | Helo WT passive evaporator (included) |
| Installation | Wall-mounted, flush to the back wall |
| Clearance to the ceiling | 1,200 mm |
| Clearance to the floor | 110 mm |
| Vienna 45 STS (4.5 kW) | |
| Recommended sauna room volume | 3–6 m³ |
| Weight without stones | 11.5 kg |
| Stone capacity | 12 kg |
| Clearance to the side walls | 40 mm |
| Clearance to the front | 60 mm |
| Cable and fuses, 400–415 V 3N~ | 5 × 1.5 mm²; 3 × 10 A |
| Cable and fuses, 230 V 3~ | 4 × 2.5 mm²; 3 × 16 A |
| Cable and fuse, 230–240 V 1N~ | 3 × 4 mm²; 1 × 20 A |
| Vienna 60 STS (6 kW) | |
| Recommended sauna room volume | 5–9 m³ |
| Weight without stones | 12 kg |
| Stone capacity | 12 or 20 kg (two-level stone space) |
| Clearance to the side walls | 60 mm |
| Clearance to the front | 80 mm |
| Cable and fuses, 400–415 V 3N~ | 5 × 1.5 mm²; 3 × 10 A |
| Cable and fuses, 230 V 3~ | 4 × 2.5 mm²; 3 × 16 A |
| Cable and fuse, 230–240 V 1N~ | 3 × 6 mm²; 1 × 35 A |
| Vienna 80 STS (8 kW) | |
| Recommended sauna room volume | 8–12 m³ |
| Weight without stones | 12 kg |
| Stone capacity | 12 or 20 kg (two-level stone space) |
| Clearance to the side walls | 80 mm |
| Clearance to the front | 100 mm |
| Cable and fuses, 400–415 V 3N~ | 5 × 2.5 mm²; 3 × 16 A |
| Cable and fuses, 230 V 3~ | 4 × 6 mm²; 3 × 25 A |
| Cable and fuse, 230–240 V 1N~ | 3 × 6 mm²; 1 × 35 A |
Installation
Installation and maintenance must be carried out by a certified electrician, with the electricity supply isolated at the fuse panel before any work begins. Under IEC 60364-7-703 and BS 7671:2018 an electric sauna heater does not have to be connected through an RCD, and for reliable operation Helo recommends that the heater supply is not run through one; other electrical devices in the sauna room should be RCD protected. A local point of isolation covering all live conductors is recommended. The connection cable is heat-resistant H07RN-F (60245 IEC 66), and the installation manual in the Downloads tab and local wiring regulations must be followed.
Helo WT water technology
The WT water tank sits among the heating elements and works as a passive evaporator, adding humidity to the sauna air. It allows three ways of bathing: a gentle sauna at 50–60 °C with enveloping steam and longer sessions, a flexi-sauna at 60–80 °C with more humidity at a lower temperature, or a classic hot sauna at 80–100 °C with the tank left dry. The gentle and flexi settings also suit bio-aroma or salt sauna use.
Sauna stones
Sauna stones are purchased separately. A smaller 12 kg fill heats the sauna faster, while the full 20 kg fill gives a softer, more enjoyable steam; Helo recommends smaller vulcanite stones under 10 cm.
Brand
Helo was founded in 1919 and was the first manufacturer of electric sauna heaters. Its heaters are still handcrafted in Hanko, Finland, and the company is part of the Sauna360 group.
Warranty
The warranty card is available in the Downloads tab.
Delivery
We offer fast and reliable delivery to customers across the UK and beyond. For full details on shipping times and costs, please review our delivery policy.
Returns
We offer hassle-free returns within 30 days of purchase, so you can shop with complete confidence. For details, see our returns policy.
Warranty & Quality Promise
We are committed to delivering products of the highest quality, for details surrounding warranty please contact us.
