Harvia Cilindro 9kW Black
Fenix touch panel on the wall, plus the MyHarvia app to warm it up from your phone
- Power
- 9 kW
- Stones
- 90 kg
- Supply
- 40 A, 230 V hard-wired
£2.96a session
£38a month
Hekla Barrel 250 - 6 Person Outdoor Sauna
Regular price £6,900.00
Unit price ⓘ Unit price based on the product measurement shown.
2-year warranty included
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Hekla
A classic barrel sauna for 6, with a porch out front
The Hekla Barrel 250 is a round thermo-spruce sauna with two facing aspen benches, a glass door and a short covered porch under the roof. The round shape keeps the heat moving around you, and it lives outside all year round.
6people
35 cmcovered porch
3steel bands
- 18 mm glass doorTempered safety glass
- 2Covered porchA step under the roof before the door
- 3Roof shinglesBitumen shingles over the top
- 4LED lightingSoft light inside
- 5Thermo-spruce stavesHeat-treated for rain and frost
- 6Steel bandsThree bands hold the staves tight
- 7Cradle baseHolds the round shell off the ground
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Round, so the heat rolls
In a barrel, warm air rises along the curved walls and falls back down to be heated again, so the heat keeps moving around you.
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Facing benches
Two thermo-aspen benches face each other along the length of the room, each about 1.9 m long.
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A porch under the roof
The door is set back behind a 35 cm porch, so you step out under cover, with a little shelter from the rain.
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Choose your rear panel
Pick a half panoramic window at the back for a view out, or a full timber back for more privacy.
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Electric or wood-fired heat
Choose a Harvia Cilindro 9 kW with dials, the black 9 kW with the Fenix Wi-Fi panel, or the Harvia Linear 18 wood burner for a real fire.
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Thermo-spruce staves
The curved staves are heat-treated spruce, held tight by three steel bands, and the roof is covered with shingles.
Why people love a barrel sauna
- A proper switch-off
- Twenty minutes of dry heat is a simple way to wind down after a long day.
- Warm whatever the weather
- Wet, cold or dark outside, it is a warm place to be in minutes, not hours.
- Time together
- Room to talk, with no screens and no distractions.
- Hot and cold
- Pair it with a cold shower or an ice bath for the full Nordic routine.
What the Barrel 250 needs from your garden
It is a small building, so plan the base, the space around it and the power before it arrives.
A firm, level base
A concrete slab or a pile foundation that lets rain drain away. The barrel sits on its cradles and Hekla says it can weigh up to about 600 kg once built, plus the people inside. Don't stand it on grass or soil.
Space around it
Plan for 223 × 250 cm, and leave room to walk round it for maintenance. We suggest at least 50 cm. At 234 cm tall it is under the usual 2.5 m height limit for garden buildings near a boundary, but check with your local council.
Power, or a flue
An electric heater is hard-wired by a qualified electrician on its own supply from your consumer unit: 35 A for 6.8 kW or 40 A for 9 kW. The Linear 18 wood burner needs no electrics, just its chimney through the roof.
223 × 250 × 234 cmWidth, depth and height
194 cmBench length, each side
35 cmCovered porch
Up to 600 kgBuilt weight, before people
Built for a British garden
What is in the staves, the glass and the roof, and why it matters when it lives outside all year.
How the Barrel 250 is built
Staves
Heat-treated spruce.
Heat treatment changes the wood so it takes in less water and moves less. Hekla uses it so the barrel stays stable through rain and frost, and it weathers naturally without paint.
What to watch for elsewhere
Untreated softwood.
Plain spruce or pine soaks up rain, swells and shrinks, and needs regular treatment to stop it cracking.
How the Barrel 250 is built
Shape
Round, held by three steel bands.
Interlocking staves form the round shell and three stainless steel bands pull it tight, so it keeps its shape as the timber settles.
What to watch for elsewhere
Loose or too few bands.
Without enough tension the staves can open up and let the weather in.
How the Barrel 250 is built
Porch
A 35 cm covered porch.
The glass door is set back under the roof, so you step out under cover and the door takes less of the weather.
What to watch for elsewhere
Door straight onto the garden.
With no porch, rain runs straight down the door and you step out into it.
How the Barrel 250 is built
Roof
Shingles over the top.
Overlapping shingles shed rain and snow off the curve of the barrel.
What to watch for elsewhere
Bare staves on top.
Without a covering, the top of the barrel takes the full force of the weather.
How the Barrel 250 is built
Benches
Facing thermo-aspen benches.
Aspen is smooth, splinter-free and resin-free, so it is comfortable on bare skin. Facing benches make it easy to talk.
What to watch for elsewhere
Resinous softwood benches.
Some softwoods can weep sticky resin in the heat and get rough over time.
Your heater and what it costs to run
Choose a Harvia Cilindro 9 kW electric heater or the Linear 18 wood burner. Hekla pairs the longer barrel with 9 kW or more. Pick one above and the figures here follow your choice.
Recommended
Harvia Cilindro 9kW
Dials on the heater for heat and timer
- Power
- 9 kW
- Stones
- 80 kg
- Supply
- 40 A, 230 V hard-wired
£2.96a session
£38a month
Harvia Linear 18 Compact
A real wood fire, no electrics needed
- Power
- 14.3 kW
- Supply
- None, plus a flue through the roof
Logsabout an armful a session
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. It is a little different with the wood burner, so pick your heater.
- 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 up tall for more heat, or put your feet up on the bench for even warmth. 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.
- Light the fire
Light the burner about an hour before, with small dry kindling first and then a few logs. Most people enjoy 70 to 90°C.
- Sit in the heat
Stay 8 to 15 minutes. Ladle a little water on the stones for soft steam, and add a log now and then to keep the heat up.
- Cool down
Step out for a cold shower, a dip in an ice bath or just fresh air.
- Rest and repeat
Drink some water and go back in when you are ready. When you have finished, let the fire burn down on its own.
A 2-year Hekla warranty
Covered by the brand, backed by our team.
Your Hekla Barrel 250 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 benches clean and stops sweat marks soaking into the wood.
Let it dry out
After a session, leave the door ajar for a while so the inside dries. Don't use cleaning products inside.
Check the stones
Re-stack the heater stones once a year and replace any that have crumbled, so the heat and steam stay even.
Let the outside weather
The thermo-spruce turns a silvery grey over time. That is normal. In heavy rain a little water can seep into the staves; it dries out when you heat the sauna.
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
Hekla saunas come direct from the maker. Here is how it gets to your garden.
Order online
Choose your finish, rear panel and heater and place your order. Nothing is sent automatically.
We call you
Our team phones to check access, your base and your electrics, and to agree a delivery date.
It arrives
Flat-packed at the kerb, or delivered and built on your base by our installers.
Choose how far we take it
Pick your option at checkout.
Flat-pack kerbside delivery
Build it yourself£149Arrives packed on a pallet at the nearest accessible point outside your property. The manual takes you through the build. It is a job for two people.
Delivery and installation
We build it for you£899Our installers deliver the sauna, build it on your prepared base and connect the heater. Just have the base ready.
Tight access, such as a narrow side path, may affect delivery, so tell us about it 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 6, on two facing benches.
What is the porch for?
It is a short covered space in front of the door, under the roof, so you can step out of the heat under cover.
Electric or wood burner?
Electric heats up with less fuss and the black Cilindro can be started from your phone. The Linear 18 wood burner gives a real fire and needs no electrician, but you light it and add logs. Both have stones for steam.
How long does it take to heat up?
A barrel heats up quickly for its size: allow about 30 to 45 minutes with an electric heater, a little longer with wood.
Do I need an electrician?
For an electric heater, yes, unless you choose delivery and installation: our team connects the heater for you. The wood burner needs no electrics.
Does it need planning permission?
Garden buildings under 2.5 m tall near a boundary usually don't, and this sauna is 234 cm tall. Rules vary, so check with your local council, and check any rules about wood burners and smoke in your area.
Can it stay outside all winter?
Yes, it is built to stand outside all year. In heavy rain a little water can seep into the staves; this is normal for a timber sauna and dries out when you use it.
What is the difference between Scandi and Nero?
Scandi is natural thermo-spruce. Nero is the same sauna with a black finish outside. The inside is the same in both.
Full specifications
Everything about the Hekla Barrel 250 in one place.
Size and weight
- Outside
- W 223 × D 250 × H 234 cm
- Benches
- 2 facing benches, about 194 cm long and 47.5 cm deep
- Porch
- 35 cm, covered
- Built weight
- Up to about 600 kg
- Capacity
- 6 people
Build
- Shell
- Thermo-spruce staves
- Bands
- 3 stainless steel bands
- Roof
- Shingles
- Base
- Timber cradles
Glass
- Door
- 8 mm tempered glass
- Rear panel
- Half panoramic window or full timber
Inside
- Benches
- Thermo-aspen
- Lighting
- Integrated LED bench lighting
Heater
- Electric
- Harvia Cilindro 9 kW with dials, the black 9 kW with the Fenix Wi-Fi panel
- Wood
- Harvia Linear 18, 14.3 kW, 40 kg stones, chimney kit included
Finish and warranty
- Finish
- Scandi (natural) or Nero (black)
- 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.