Arden Horizon
Modular Outdoor Sauna
- 10.8kWHarvia Legend heater
- Full-heightGlass door and front window
- 6–10 weeksBuilt to order
Specifications
| External (H × W × D) | 230 × 335 × 230cm |
|---|---|
| Bench | Two-tier benches with LED lighting under the benches and behind the backrest |
| Door | Full-height glass entrance door and large front window, in clear or tinted glass |
| Heater | 10.8kW Harvia Legend electric heater, included, in black or silver |
| Electrical supply | Single-phase on a dedicated 50A circuit, or a 400V three-phase supply (3 × 16A). Must be installed and certified by a registered electrician to BS 7671. |
Delivery & installation
Usually 6–10 weeks, depending on model and options.
Delivery is quoted for your address.
Scottish islands: on request, quoted individually.
Installation covers building the sauna and getting it into position. Base and electrics not included.
Electrical: Single-phase on a dedicated 50A circuit, or a 400V three-phase supply (3 × 16A). Must be installed and certified by a registered electrician to BS 7671.
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
- 335 × 230cm
- Height
- 230cm
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 Arden suits your garden?
Both are built to order around a 10.8kW Harvia Legend. Panorama adds a front room for cooling down between rounds.
| You're viewingArden Horizon From £19,995 | Arden Panorama From £24,995 | |
|---|---|---|
| Size | ||
| Footprint (W × D) | 335 × 230cm | 410 × 245cm |
| Height | 230cm | 230cm |
| Layout | One sauna room | Sauna room and front room |
| Heat | ||
| Heater | 10.8kW Harvia Legend | 10.8kW Harvia Legend |
| Power supply | Single-phase (50A) or three-phase | Single-phase (50A) or three-phase |
| Cost per session* | About £3.55 | About £3.55 |
| Design | ||
| Glass | Glass door and large front window | Large glass panels across the front |
| Benches | Two-tier, lit with LEDs | L-shaped two-tier, plus front-room benches |
| Finish | Black or brown | Black or brown |
| Tinted glass | +£395 | +£395 |
| Order and delivery | ||
| Lead time | Built to order, usually 6–10 weeks | Built to order, usually 6–10 weeks |
| Delivery | Quoted for your address | Quoted for your address |
| Add to bag | Shop Arden Panorama | |
*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.
Made for the garden
Arden Horizon is a glass-fronted modular garden sauna with lit two-tier benches and a 10.8kW Harvia Legend heater, built to order in black or brown.
At a glance
- Heater: 10.8kW Harvia Legend, included, in black or silver
- Finish: Black or brown
- Glass: Clear as standard, or tinted for £395
- Power: Single-phase on a dedicated 50A circuit, or 400V three-phase
- Lead time: Built to order, usually 6–10 weeks
- Delivery and installation: Quoted for your address
A full-height glass door and a large front window open the sauna up to the garden. Inside, two tiers of benches are lit from below and behind, so the cabin glows in the evening.
Design
- Full-height glass entrance door and a large front window
- Two-tier benches, with LED lighting under the benches and behind the backrest
- Exterior wall lights either side of the front
Options
Black or brown
Black is the signature Arden finish. Brown swaps the black exterior for warm natural timber tones.
Harvia Legend heater, in black or silver
Every Arden comes with a 10.8kW Harvia Legend heater. Its tall stone column holds around 100kg of stones, and Harvia rates it for sauna rooms of 9 to 18m³. Pour water over the stones for soft, rolling steam.
Clear or tinted glass
Clear glass is standard. Tinted glass on every panel is £395, for more privacy in an overlooked garden.
Tailored to you
Because every Arden is built to order, we can add further upgrades, such as a backlit salt wall. Ask us for options and prices.
Before you buy: power
The 10.8kW Legend runs on a UK single-phase supply with its own 50A circuit, or a 400V three-phase supply (3 × 16A). A 50A circuit is a significant load for a home, so have a registered electrician check your supply before you order. All electrics must be installed and certified to BS 7671; we don't carry out household electrical work.
Lead time, delivery and installation
Arden saunas are built to order and usually ready in 6 to 10 weeks, depending on the model and options. We confirm your timing when you order. Delivery and installation are quoted for your address: we build the sauna and set it in position, and the base and electrics are arranged separately. We're happy to advise on a suitable base.
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.
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.
-
4kW heater
Solen Compact, as standard
£1.32per session
- Per week
- £3.96
- Per month
- £17.16
- Per year
- £206
-
6kW heater
Two-person cabins, and the Solen Compact upgrade
£1.97per session
- Per week
- £5.91
- Per month
- £25.61
- Per year
- £307
-
10.8kW heaterArden
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?
Check the size and footprint in the specifications, then leave 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. Saunas are heavy, 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?
It depends on the heater, so check the electrical supply in the specifications above. Every sauna heater needs its own dedicated circuit, installed and certified by a registered electrician to BS 7671, and larger heaters need a bigger circuit or a three-phase supply. Ask your electrician to check your supply has 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.
Still have a question?
Search our answers on siting, power, delivery and installation.
What happens next
-
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. Built-to-order saunas usually take 6 to 10 weeks.
-
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.
-
Power up and enjoy
Your electrician connects the heater, you register your warranty, and your first session is ready.
See every step