ThermaSauna 4M Cube with relax room is a perfect sauna for spacious homestead or a small yard which is ready to use first day after delivery. The sauna has 2 benches (200x58 cm) inside, which allows 2 people to lie down or 4-6 people to sit in the sauna. 


Sauna does not require heavy foundation. 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).


Sauna specifications:

  • Walls and roof are made of 42 mm solid spruce wood. Wall elements are tightened with long screws which ensure strength and stability of construction. Sauna comes fully built and ready to use instantly after delivery.
  • Roof is covered with bitumen shingles.
  • Floor in sauna room is made from untreated 27 mm terrace boards with air gaps for ventilation and water drainage. Floor in relax room is made from floorboards, which can be painted. 
  • All wood used for floor frame and construction is impregnated.
  • For electricity and lights we use Harvia Light sauna lamps, special heat and water resistant cables and IP65 waterproof switches. 
  • 2 entrance doors made of tempered and tinted glass. 
  • 2 windows (30x94 cm) on the back wall in tempered glass. 
  • There are 2 full size benches (200x58 cm) inside the sauna. Benches are made from aspen or black alder wood. 
  • Outdoor painting is included (transparent grey, brown, teak, black, red or silver grey colors). Other colors available (€400).


Heater options:

  • Harvia M2 wood heater with stones and uninsulated chimney through the wall costs €800.The heating time is a maximum of 1 hour. The heater is placed on a special floor protective pad (10 cm high). The walls near the unit are protected by a Cembrit board. The chimney outlet is insulated with a special heat-resistant wool, Cembrit board on the inside and a stainless steel plate on the outside.
  • The chimney can be replaced with insulated Harvia WHP1500 through the roof for €300. 
  • Electric Harvia Trendi KIP 90 (9 kW) heater with stones costs €450.
  • Electric Harvia Cilindro PC 90 (9 kW) heater with stones costs €550.


Other accessories are available:

  • Wooden door with or without window €50.
  • Extra windows: 30x94 cm +90 eur, 60x94 cm +110 eur, 60x148 cm +140 eur, 120x148 cm +200 eur, 60x175 cm +180 eur, 120x175 +250 eur.
  • Openable windows from €150.
  • Water tank above the heater €200.


Capacity: 2-6 persons

External height: 225 cm

Outside length: 400 cm 

Width outside: 240 cm 

ThermaSauna 4M Cube

  • Ordering Process

    We will gladly accept your order by email

    You may also call us for any assistance +358 (457) 3962777; +46 (73) 1214444

  • Delivery Information

    Delivery time 10-15 business days. Delivery available in the following countries:

    • Belgium FREE delivery
    • Denmark €100 for delivery
    • Estonia FREE delivery
    • Finland* FREE delivery
    • Germany FREE delivery
    • Latvia FREE delivery
    • Lithuania FREE delivery
    • The Netherlands FREE delivery
    • Poland FREE delivery
    • Sweden** FREE delivery

    *Delivery price is within 500 km from Helsinki. Please inquire for delivery price to remote areas.

    **Delivery price is within 500 km from Stockholm. Please inquire for delivery price to remote areas.

    The sauna is delivered pre-assembled on a trailer without a crane, therefore you must arrange the unloading of the sauna from our trailer. 

    The sauna is delivered pre-assembled on a trailer without a crane, therefore you must arrange the unloading of the sauna from our trailer. 

    Is it difficult to get to your house to unload the sauna? We can offer you a sauna building on site. The sauna can be built in 1-2 days. Contact us for more information. 

  • Warranty

    Seller provides a manufacturing warranty for production for 24 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.