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Sauna build calculator
Estimate heater size, bench position, ventilation quality, insulation strength, drainage risk and material suitability before you build.
Metres.
Metres. 0.6m minimum, 0.9m better for lying down.
cm². A standard 2m x 2m sauna wants around 150cm² intake.
mm. 10–15mm is usually useful for fresh air.
mm. 100mm rock wool/mineral wool is a good minimum.
mm. Ceiling usually needs more because heat rises.
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