What this is
About Sauna Blueprint
A specification reference for people planning a sauna, built by reading 33 manufacturer documents and writing down what they actually say.
The problem this exists to fix
If you are choosing a sauna heater, you need a small number of specific facts: the volume of room the heater is rated for, what electrical supply it needs, how many circuits that is, what clearances it requires, and whether a control unit is included. These are not exotic questions. They are the questions your electrician will ask you.
Almost no consumer sauna page answers them. Listings give a kW figure, a room-size range, and a photograph. The electrical details live in a PDF manual linked three clicks away, if at all. Kit listings routinely decline to say which heater is in the box. Infrared cabins are marketed on EMF claims whose supporting documents, where they exist, turn out to measure something narrower than the claim.
So we read the manuals. All of them, for 145 products, and wrote down what they say — and what they don’t.
What makes this different
- Blank fields stay blank. We recorded 994 fields as unpublished rather than estimating them. Most directories quietly compute the missing value. That is where wrong electrical information comes from.
- Contradictions are published, not resolved. We found 25 cases where a manufacturer disagrees with itself, and we show both values with both sources rather than picking one.
- The sizing calculator admits that manufacturers disagree. Harvia and HUUM publish different rules for how much a glass wall adds to your heating requirement. Any calculator using a single coefficient is wrong for one of them. Ours runs both published methods and shows you the spread.
- Comparison actually exists. Not one of the fifteen sauna sites we audited lets you put models side by side. Here you can, up to four at a time, within a category.
- Products we cannot earn from are included anyway. Where the only way to buy something is from the vendor, we say so and send you there.
Who this is for
People at the planning stage: working out whether a heater suits a room, what the electrical implications are, and what to ask a manufacturer or an electrician before committing. It is also useful to installers checking what a manufacturer has and hasn’t documented before quoting a job.
It is not a review site. There are no scores here and no “best” list, because the right heater depends on your room’s volume, its surfaces, and your electrical supply — three things a ranking cannot know.
What we can’t do for you
We have not tested these products. We cannot tell you what breaker to fit, what conductor to run, or whether your panel has capacity — and we will not publish wiring instructions that imply otherwise. What we can do is show you exactly what the manufacturer committed to in writing, so the conversation with your electrician starts from documented facts instead of a marketing page.
Where to start
If you are early in planning, start with the sizing calculator and the sizing guide. If you already know roughly what you need, go straight to the heater specifications. There are 18 guides covering the questions the tables can’t answer on their own.