ThermaSol Warranty Policy

A ThermaSol sauna carries two separate warranties: one from ThermaSol on the room, and one from Harvia on the heater inside it. They differ in length and they are claimed in different places, so it is worth knowing which is which before you need either.

The sauna room: 1 year. ThermaSol warrants its sauna rooms for one year from substantial project completion, covering defective workmanship and materials such as mis-cuts, rough lumber or knot loss.

You may see a lifetime warranty mentioned elsewhere. It does not apply to these cabins. ThermaSol's lifetime tier covers Harvia-branded sauna rooms and discontinued ThermaSol Legacy rooms. No cabin we sell is a Legacy room, so the term that applies is one year. We would rather tell you that now than have you discover it at a claim.

The heater, control and power box: 5 years residential. The Harvia heater, its Xenio or Fenix control and the power box carry five years in a private residential setting, or one year in a commercial one. Stones and heating elements carry one year either way.

Two conditions decide most claims. The room must be registered within 15 days of purchase, and it must be installed by a certified electrician or qualified service representative. Miss either and the cover is compromised before anything has gone wrong.

What is not covered. Normal wear, wood weathering, UV discolouration and the natural ageing of materials. Labour, including removal, reinstallation and shipping. Return freight on a defective part. Unauthorised alteration, and any installation that does not comply with local code. Running a shower inside a sauna room. And an installation that leaves no service access to the heater, which is why the placement clearance on each product page is worth respecting.

Commercial use voids it entirely. ThermaSol excludes residential units used in any non-residential setting and names hotels, spas, gyms, health clubs and short-term rentals specifically. If your project is commercial, talk to us before you order and we will quote from a range that is warranted for it.

How to claim, and who you call. Cabin claims go through ThermaSol and we will start that for you. Harvia heaters are serviced by Harvia US directly on 877.842.7842 or support@harvia.us, which is a separate route from the cabin. Warranties apply to the original purchaser at the original installation address and are not transferable.

This page summarises the manufacturer's published terms as they stood on 8 October 2026 and is not a substitute for them. For anything that turns on the exact wording, ask us and we will get it in writing. Call 1-888-500-5675, Monday to Saturday 9am to 6pm ET.