Sauna rocks included with every heater

Can You Pour Water on an Electric Sauna Heater?

Yes. Every Procraft electric sauna heater is built for traditional sauna use, so you can pour water over the hot rocks to make steam. Use a small ladle of water at a time, aim it at the rocks and not at the heater body or the controls, and follow the heater manual. Do not pour water anywhere else on the heater.

Why you pour water on the rocks

A traditional sauna is a dry heat until you add humidity. Ladling water over the heated rocks flashes it to steam and gives you a short, intense wave of warmth and humidity. In Finnish this is called loyly. It makes the same air temperature feel hotter, and it is a big part of why people love a traditional sauna. Between splashes the room dries back out.

How to do it properly

  • Use a proper sauna ladle and bucket. A cup or two of water at a time is plenty.
  • Pour it over the rocks, which are the hot stones sitting in the top of the heater.
  • Keep water off the heater casing, the element, and the controls.
  • Plain water is best. You can add a few drops of a sauna-safe essential oil to the water if you like the scent, but never pour oils or fragrance straight onto the rocks.
  • Let the rocks reheat for a moment between splashes.

Dry or wet, both work

You do not have to add water at all. Run the sauna dry and it is a classic dry sauna. Add water when you want steam. Every Procraft heater ships with 50 lbs of rocks so it is ready for both from day one. There is more on the difference in our guide on wet sauna vs dry sauna.

One thing to avoid

This only applies to heaters designed for it. A traditional sauna heater like ours is built to take water on the rocks. An infrared sauna, which uses panels instead of rocks, is not, and you should never throw water at electrical panels. If you ever use a different heater, check its manual first.


Procraft builds Western red cedar saunas and makes four CSA-approved electric sauna heaters, from 4.5kW to 9kW. See the heaters, read about Western red cedar, or learn how our installations work.

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