4M Barrel ThermaSauna with relax room is made for up to 4 persons. There are 2 benches (205x58 cm) inside the sauna, which allows 4 persons enjoy the sauna. The sauna is very compact, yet comfortable - the Harvia M3 wood fired heater will heat up the sauna in less than an hour.


Sauna does not require heavy fundament. It can be placed almost anywhere temporary, but for a permanent installation we recommend to put it on terrace, paving, stone chips or at least few bricks under corners. Construction is strong and very stable, which makes it safe to lift the whole sauna (i.e. for transportation, to change location in your garden, to sell it in future etc).


  • Walls and roof are made of 40 mm solid spruce wood. Wall elements are tightened with long screws which ensure strength and stability of construction. We deliver our saunas fully assembled, yet our team can come and build it at your garden.
  • Roof is covered with bitumen shingles.
  • Floor in sauna and relax room is made from 27 mm terrace boards with air gaps for ventilation and water drainage. All wood used for floor frame and floor construction is impregnated.
  • Sauna is heated with powerful yet economic Harvia M2/M3 13 kW wood fired heater with stones. Heating time up to 1 hour. Walls around heater are protected with special heat and water resistant board and fireproof rockwool. Sauna with Electric Harvia KIP 90 9kW heater costs 1500 kr less.
  • An adjustable ventilation grid is installed in the highest point of the wall.
  • For electricity and lights we use Harvia Light sauna lamps, special heat and water resistant cables and IP65 waterproof switches.
  • Entrance door made of 6 mm tempered and tinted glass. It is possible to change the entrance door to traditional wooden door for additional 1500 kr. The tinted glass door are also for entering the sauna.
  • 4 windows are added (2 on the back wall, 2 on the front wall).
  • There are 2 full size benches (205x58 cm) inside the sauna. Benches are made from aspen wood.
  • Relax room includes 2 benches for relaxation and cooling down.
  • It is possible to add an 80 cm terrace with 2 seats for the barrel sauna for 5500 kr.
  • Standard sauna is not painted. Exterior painting is available. Price varies according to the colour (1500 - 2500 kr).


Capacity: 2-4 persons.

Sauna room length: 205 cm

Relax room length: 170 cm

Diameter 228/237 cm.

Weight: approx 1100 kg

ThermaSauna 4M

  • Ordering Process

    We will gladly accept your order by email sales@thermatub.se

    You may also call us for any assistance +46 (73) 1214444

  • Delivery Information

    Free delivery within 500 km from Stockholm. For remote areas (>500 km from Stockholm), 10 kr/km.

    Delivery time 5-10 days.

  • Warranty

    Seller provides a manufacturing warranty for production for 12 months after delivery. Seller does not provide warranty for wooden components. Heaters carry warranties from their respective manufacturers. Note! The commercial use of sauna has a 3 months warranty. 

    • The Warranty does not cover any errors that are typical for material, and does not concern wear due to normal use. 
    • The Warranty does not cover damage caused by misuse. Please read the User manual and Warranty properly and follow it. 
    • The Warranty does not cover corrosion or damage due to use of seawater or aggressive chemicals. 
    • The Warranty is not applied if you try to repair the product yourself.

    Contact the Seller about Warranty matters. Usually Seller replace false components within 30 days after proper announcement. False components must be provided to dealer in case of replacement. Buyer shall pay cost of transportation. Delivery of broken components cannot cost more than Buyer has paid for de-livery of whole sauna.