Harvia The Wall 9kW
Fenix touch panel on the wall, plus the MyHarvia app
- Power
- 9 kW
- Supply
- Hard-wired by an electrician
£2.96a session
£38a month
Hekla Traditional 210x - 4-5 Person Indoor Sauna
Model: HEKLAT210X
Regular price £4,400.00
Unit price ⓘ Unit price based on the product measurement shown.
Hekla
A traditional sauna room for four or five, at home
The Hekla Traditional 210x is an indoor sauna cabin with a full grey glass front, a smooth thermo-aspen interior and benches for four or five. Heat it with a Harvia The Wall heater, ladle water on the stones and get proper Finnish heat in a spare room, garage or basement.
4–5people
9 m³room volume
8 mmglass front
- 18 mm grey safety glassFull glass front
- 2Glass doorWith a long handle
- 3LED lightingUnder the benches
- 4Two levels of benchThermo-aspen
- 5Timber outsideScandi or Nero
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A full glass front
8 mm grey safety glass across the front, with a glass door and a long handle, keeps the cabin light and open to the room.
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Thermo-aspen inside
Aspen is smooth, splinter-free and resin-free, so it is comfortable on bare skin and doesn't weep sticky resin in the heat.
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Benches on two levels
Deep 60 cm benches: an upper bench across the back and down the left side in an L, with a lower bench in front, so there is room to lie down.
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Harvia The Wall heater
A slim wall-hung heater with the Fenix Wi-Fi panel, so you can set the heat on the wall or start it from your phone. It comes with 9 kW.
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Soft LED light
LED lighting under the benches, with colour settings, for a calm evening session.
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Comes with the essentials
A bucket, a ladle, a thermometer and hygrometer, and a sauna timer are in the box.
Why people love a sauna at home
- A proper switch-off
- Twenty minutes of heat is a simple way to wind down after a long day.
- No trip to the spa
- It is in the house, so a session fits round work, the school run or a late evening.
- Time together
- Room to talk, with no screens and no distractions.
- Hot and cold
- Follow it with a cool shower or an ice bath for the Nordic routine.
What the Traditional 210x needs from the room
It is a cabin that stands inside a room, so check the space, the way in and the power before it arrives.
A dry, level floor
Stand it on a dry, level, hard floor in a dry room. It is made for indoor use only.
Space around it
The cabin is 211 × 205 cm and 200 cm tall. Hekla asks for at least 50 cm clear above it to fit the roof panel and wiring, so you need a ceiling of about 250 cm. Leave room to open the door.
A dedicated electric supply
The Wall heater is hard-wired by a qualified electrician on its own supply from your consumer unit, on a standard 230 V supply. Keep the room ventilated.
211 × 205 × 200 cmWidth, depth and height
200 × 200 cmInside, wall to wall
9 m³Room volume, for sizing the heater
250 cmCeiling height you need
Built like a proper sauna room
What is in the walls, the glass and the benches, and why it matters.
How the Traditional 210x is built
Walls
A timber frame lined with thermo-aspen.
The inside is smooth thermo-aspen, which stays comfortable to touch in the heat and has no resin to weep.
What to watch for elsewhere
Resinous softwood inside.
Some cheaper cabins use softwood that can weep sticky resin and get hot to the touch.
How the Traditional 210x is built
Glass
8 mm grey safety glass.
A full glass front and door in tempered safety glass made for sauna heat, so the cabin feels open rather than boxed in.
What to watch for elsewhere
A small window in a timber door.
A solid front can make a small room feel dark and enclosed.
How the Traditional 210x is built
Light
LED light under the benches.
Soft light from below, with colour settings, so the room feels calm rather than bright.
What to watch for elsewhere
A single ceiling light.
A bare light above your head is harsh when you are trying to relax.
How the Traditional 210x is built
Air
A ventilation valve.
Fresh air comes in and warm, used air goes out through the vent, so the air stays fresh while you sit in the heat.
What to watch for elsewhere
No way for air to move.
Without ventilation the air goes stale and the room gets stuffy.
Your heater and what it costs to run
The Traditional 210x uses Harvia The Wall, a slim heater that hangs on the wall to save space, with the Fenix Wi-Fi panel. It comes with 9 kW, which Hekla matches to the room. Pick one above and the figures here follow your choice.
Recommended
How we work this out: a 45-minute warm-up at full power, then a one-hour session with the heater on about half the time, so about 1.25 hours at full power. Electricity at 26.32p per kWh, the Ofgem price cap from October to December 2026. A month is 4.3 weeks. Your costs depend on your tariff, the weather and how hot you like it.
Your first sauna session
There is no wrong way to sauna, but this simple rhythm is how most Finns do it.
- Warm it up
Switch on 30 to 45 minutes before. Most people enjoy 70 to 90°C. Take a quick shower first.
- Sit in the heat
Stay 8 to 15 minutes. Sit higher for more heat, lower for less. Ladle a little water on the stones for a burst of soft steam.
- Cool down
Step out for a cold shower, a dip in an ice bath or just fresh air.
- Rest and repeat
Sit down, drink some water, and when you are ready go back in. Two or three rounds is plenty.
A 2-year Hekla warranty
Covered by the brand, backed by our team.
Your Hekla Traditional 210x comes with Hekla's 2-year warranty, and your Harvia heater is covered by Harvia. If anything goes wrong, call us first and we'll sort it out with the maker for you.
Brand warranty
Help from our UK team
Easy to look after
A few simple habits keep it looking good and smelling fresh.
Sit on a towel
It keeps the aspen benches clean and stops sweat marks soaking into the wood.
Let it dry out
After a session, leave the door ajar so the inside dries. Don't use cleaning products or oils inside.
Check the stones
Re-stack the heater stones once a year and replace any that have crumbled.
Keep the room aired
Keep the vent clear and the room around the cabin ventilated, so warm, damp air has somewhere to go.
What our customers say
Rated by our customers
Independent reviews from people who bought from us, collected and shown by Trustpilot.
Who we work with
Hull FC
Hull City
Queens Park Rangers
DIY SOS The Big Build
Delivery and installation
Here is how it gets into your home.
Order online
Choose your finish and place your order. Nothing is sent automatically.
We call you
Our team phones to check access into the room, the space and the power, and to agree a delivery date.
It arrives
Flat-packed at the kerb, or delivered and built in the room by our installers.
Choose how far we take it
Pick your option at checkout.
Flat-pack kerbside delivery
Build it yourself£149Arrives packed at the nearest accessible point outside your property. The panels slot together and the manual takes you through it. It is a job for two or three people.
Delivery and installation
We build it for you£399Our installers bring it into the room and build it for you. Have a qualified electrician lined up to connect the heater.
Measure doorways, stairs and corners on the way to the room, and tell us about tight spots when we call. Read the delivery guide
Questions people ask
The things people usually want to know before they buy.
How many people fit?
Hekla says 4 to 5, on two levels of bench.
Can I put it in a garage or basement?
Yes, as long as the room is dry, level and ventilated. It is made for indoor use only.
How much ceiling height do I need?
About 250 cm. The cabin is 200 cm tall and Hekla asks for 50 cm above it to fit the roof panel and wiring.
Can I pour water on the stones?
Yes. The Wall holds stones, and a ladle of water makes a burst of soft steam, called löyly. The ladle and bucket are in the box.
Can I warm it up from my phone?
Yes. The Wall comes with the Fenix Wi-Fi panel and the MyHarvia app.
Do I need an electrician?
Yes. The heater is hard-wired to its own supply by a qualified electrician.
What is the difference between Scandi and Nero?
Scandi is natural timber outside. Nero has a black finish outside. The inside is the same in both.
Full specifications
Everything about the Hekla Traditional 210x in one place.
Size
- Outside
- W 211 × D 205 × H 200 cm
- Inside
- About 200 × 200 cm
- Room volume
- 9 m³
- Space above
- At least 50 cm
- Capacity
- 4–5 people
Build
- Inside
- Thermo-aspen
- Glass
- 8 mm grey safety glass front and door
- Lighting
- LED under the benches
- Ventilation
- Ventilation valve
Heater
- Heater
- Harvia The Wall with Fenix Wi-Fi
- Power
- It comes with 9 kW
- Stones
- About 20 kg
- Supply
- Hard-wired, 230 V, by an electrician
In the box
- Accessories
- Bucket, ladle, thermometer and hygrometer, sauna timer
Finish and warranty
- Finish
- Scandi (natural) or Nero (black)
- Use
- Indoors only
- Warranty
- 2 years from Hekla
Sizes are from Hekla's spec sheet and drawing. The bench layout in our plan follows Hekla's drawing. Running costs are estimates.