Solen Plus
4–6 Person Outdoor Sauna with Glass Front
- 4–6People
- 9kWHarvia Spirit heater
- 160 × 160cmFootprint
Specifications
| Capacity | 4–6 people |
|---|---|
| External (H × W × D) | 235 × 160 × 160cm |
| Weight | Approx. 600kg |
| Walls | 40mm spruce, wood treatment included |
| Bench | Alder and linden, with matching floor grates |
| Door | Full-glass entrance with frame |
| Roof | Shingles in black, brown, red or green |
| Heater | 9kW Harvia Spirit electric heater |
| Control | Standard control included, or Harvia Wi-Fi control with the MyHarvia app for +£395 |
| Electrical supply | Standard 230V single-phase supply. Needs its own dedicated circuit, installed and certified by a registered electrician to BS 7671. |
Delivery & installation
Usually delivered in 6–10 weeks, depending on any bespoke requirements.
England & Wales: £395
Mainland Scotland: £900
Northern Ireland: £1,500
Scottish islands: on request, quoted individually
Arrives flat-packed: 120 × 120 × 160cm (H × W × D), Approx. 600kg.
Installation covers building the sauna and getting it into position. Base and electrics not included.
Electrical: Standard 230V single-phase supply. Needs its own dedicated circuit, installed and certified by a registered electrician to BS 7671.
Warranty
2 years on wood, 1 year on electricals (on registration)
Not sure your garden's ready? Take the 2-minute check









Traditional heat
A Harvia heater, hot stones and soft steam, the Finnish way.
Hand-picked and tested
Every sauna is chosen and tested by our team.
Delivery and installation
Delivery options for your postcode, with installation quoted for your location.
A British company
Based in Northamptonshire, with a showroom you can visit by appointment.
Will it fit your garden?
Here it is to scale, next to an average adult and on standard paving slabs.
- Footprint
- 160 × 160cm
- Height
- 235cm
- Arrives flat-packed
- 120 × 120 × 160cm
- Weight
- Approx. 600kg
Needs a firm, flat, load-bearing base, with enough clearance around it for installation and future maintenance.
Grid shows 60 × 60cm paving slabs. The dashed line is a reminder to leave room for installation and maintenance.
Drawn to scale. Simplified for illustration.
Which Solen fits your garden?
Both heated by Harvia. The difference is size, glass and how many you want to share it with.
| Solen Compact From £5,795 | You're viewingSolen Plus From £9,995 | |
|---|---|---|
| Size | ||
| Seats | 1–2 people | 4–6 people |
| Footprint (W × D) | 167 × 120cm | 160 × 160cm |
| Height | 216cm | 235cm |
| Weight | 450kg | Approx. 600kg |
| Heat | ||
| Heater | 4kW or 6kW Harvia | 9kW Harvia Spirit |
| Power supply | Single-phase | Single-phase |
| Cost per session* | About £1.32 (4kW) or £1.97 (6kW) | About £2.96 |
| Build | ||
| Walls | 45mm Thermowood | 40mm spruce |
| Benches | Raised alder | Alder and linden |
| Door | Tinted tempered glass | Full-glass front |
| Roof | Black Katepal | Shingles in four colours |
| Upgrade | 6kW heater, +£100 | Wi-Fi app control, +£395 |
| Cover and delivery | ||
| Warranty | 2 yrs wood, 1 yr electrics | 2 yrs wood, 1 yr electrics |
| UK delivery | From £395, or free showroom collection | From £395 |
| Shop Solen Compact | Add to bag | |
*A 45-minute warm-up plus a one-hour session, with the heater running about half the time once hot, at the Ofgem price cap average of 26.32p per kWh (Oct–Dec 2026). Your tariff and habits will change the figure.
Room for up to six, in a 160cm square.
Solen Plus is a traditional outdoor sauna for four to six people, with a full-glass front, built in 40mm spruce and heated by a 9kW Harvia Spirit, in a 160 × 160cm footprint.
At a glance
- Seats: 4 to 6 people
- Size: 235cm high × 160cm wide × 160cm deep
- Heater: 9kW Harvia Spirit electric heater, wall-mounted, with an open stone basket for steam
- Control: standard control included, or upgrade to Harvia Wi-Fi control with the MyHarvia app for £395
- Power: standard UK single-phase supply, on its own dedicated circuit
- Build: 40mm spruce walls, alder and linden benches and floor grates
- Front: framed, full-glass entrance
- Finish: shingle roof in black, brown, red or green; exterior wood treatment included
- Delivery: usually 6 to 10 weeks, depending on any bespoke requirements; £395 to England and Wales
- Warranty: 2 years on the wood, 1 year on the electricals, on registration
Solen Plus is the family-sized sauna in our Solen range, with room for four to six. The full-glass front opens the cabin to your garden and lets in daylight, so every session feels connected to the outdoors.
Design and materials
A full-glass front
The framed, full-glass entrance brings in light and views of the garden, and makes the cabin feel open and generous.
9kW Harvia Spirit heater
The Harvia Spirit is a wall-mounted heater with a sculpted, curved design and an open basket of exposed stones. At 9kW it is sized for a cabin of this size, bringing it up to traditional sauna temperatures. Pour water over the stones for a soft wave of steam and set the intensity of each session yourself.
Harvia Wi-Fi control, for £395
Add Harvia Wi-Fi control and run your sauna from the MyHarvia app: start it remotely so it's hot when you get home, set a weekly timer, adjust the temperature and lighting, and check its status from anywhere. Remote start only works when the sauna has been made safe, with a door sensor that stops it if the door is opened. Choose it when you order.
Spruce cabin, alder and linden benches
40mm spruce walls hold the heat in. The benches and floor grates are alder and linden, timbers that stay comfortable to sit on at sauna temperatures.
Your choice of finish
Choose a shingle roof in black, brown, red or green. Exterior wood treatment is included, in a choice of colours.
Who is Solen Plus for?
Families, and anyone who wants to share sessions with friends, in a cabin that still fits a 160 × 160cm corner of the garden.
Before you buy
- Space: a 160 × 160cm footprint with 235cm of height, plus room around the cabin for installation and maintenance.
- Base: a firm, flat, load-bearing surface such as a concrete pad, paving or a suitably built deck. Solen Plus weighs around 600kg.
- Power: Solen Plus runs on a standard UK single-phase supply. The heater needs its own dedicated circuit, installed and certified by a registered electrician to BS 7671, so ask yours to check your supply has the capacity.
- Wi-Fi: if you choose Wi-Fi control, make sure your home Wi-Fi reaches the sauna. A mesh system or outdoor extender can help at the bottom of a long garden.
- Access: it arrives flat-packed at around 120 × 120 × 160cm (H × W × D), so check the route from the kerb to its final spot.
Delivery, installation and warranty
Solen Plus is usually delivered in 6 to 10 weeks, depending on any bespoke requirements. Delivery is £395 to England and Wales, £900 to mainland Scotland and £1,500 to Northern Ireland; the Scottish islands are quoted individually. Professional installation is available and quoted for your location: we build the sauna and set it in position, and the base and electrics are arranged separately. Get an instant estimate. The warranty covers the wood for 2 years and the electricals for 1 year, on registration.
See our saunas in person at our showroom, by appointment: Ash Tree Farm, Stoke Albany Road, Northamptonshire, NN14 2SP. Book a visit or ask us anything about siting, power and delivery.
Your sauna, ready when you are
Upgrade to Harvia Wi-Fi control and run Solen Plus from the MyHarvia app. A sauna that's hot the moment you want it is one you'll use far more often.
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Start it from anywhereSwitch the sauna on from your phone on the way home, so it's up to temperature when you walk through the door.
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Set it and forget itUse the weekly timer to have the sauna hot at the same time each day, ready for your evening session or a weekend morning.
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Fine-tune every sessionAdjust the temperature and lighting, and check the sauna's status, wherever you are, from the MyHarvia app.
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Safety built inRemote start only works once the sauna has been made safe, and a door sensor stops it if the door is opened.
Needs a home Wi-Fi signal at the sauna; a mesh system or outdoor extender can help at the bottom of a long garden. Choose Wi-Fi control when you order.
What does it cost to run?
Less than most people expect. Here's a rough guide for a typical session, by heater size. Tell us how you'd use it.
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6kW heater
Two-person cabins, and the Solen Compact upgrade
£1.97per session
- Per week
- £5.91
- Per month
- £25.61
- Per year
- £307
-
9kW heaterSolen Plus
Solen Plus, as standard
£2.96per session
- Per week
- £8.88
- Per month
- £38.48
- Per year
- £462
-
10.8kW heater
Arden Horizon and Arden Panorama
£3.55per session
- Per week
- £10.65
- Per month
- £46.15
- Per year
- £554
Rough estimates to help you plan. Outdoor figures include 45 minutes to heat up, then the heater switching on and off to hold the temperature while you're inside (50% on-time). The weather and how hot you like it make a difference too. Prices use the average UK electricity rate of 26.32p per kWh (Ofgem price cap average, Oct–Dec 2026). Your own bill will depend on your tariff and how you use it.
Will it fit in my garden?
Solen Plus needs a 160 × 160cm footprint and 235cm of height, plus extra clearance around the cabin for installation and maintenance. Our 2-minute garden check matches your space against our outdoor saunas.
What base does it need?
A firm, flat, load-bearing base, such as a concrete pad, paving slabs or a suitably built deck. Solen Plus weighs around 600kg, so soft lawn or loose gravel won't do. We don't lay bases, but we're happy to advise on which one to use.
What power supply does it need?
Solen Plus runs on a standard UK single-phase supply, which is what most homes have. The 9kW heater needs its own dedicated circuit, installed and certified by a registered electrician to BS 7671, so ask yours to check your supply has the capacity before you order.
Do I need planning permission?
Often not. In England, most garden saunas fall under permitted development as outbuildings, within size, height and siting limits. Read our planning guide.
Can I see it before buying?
Yes, by appointment at our showroom: Ash Tree Farm, Stoke Albany Road, Northamptonshire, NN14 2SP. Many of our saunas are built to order or tailored to each customer, so the models on display change from time to time. Book a visit, tell us which sauna you'd like to see, and we'll confirm what's on display before you travel.
What does the Wi-Fi upgrade do?
For £395, Harvia Wi-Fi control lets you run Solen Plus from the MyHarvia app. You can start it remotely so it's hot when you get home, set a weekly timer, adjust the temperature and lighting, and check its status from anywhere. Remote start only works once the sauna has been made safe, and a door sensor stops it if the door is opened. You'll need a Wi-Fi signal at the sauna.
Still have a question?
Search our answers on siting, power, delivery and installation.
What happens next
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Order confirmed
You'll get a confirmation email, then we'll be in touch to talk through siting, your base, power and delivery or collection. Solen Plus usually takes 6 to 10 weeks, depending on any bespoke requirements.
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Get your garden ready
Prepare a firm, flat, load-bearing base and book a qualified electrician.
Take the garden check -
Delivery or collection
Delivered to your door, or collected from our showroom where available. Installation quoted for your location.
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Power up and enjoy
Your electrician connects the heater, you register your warranty, and your first session is ready.
See every step