Wood-fired saunas

A wood-fired sauna is heated by a stove burning logs, with stones on top. There's no need for a heavy electrical supply, which suits gardens a long way from the house.

You'll need a flue with the right clearances, somewhere dry to store wood, and time to light it and let it come up to heat. Think about smoke and your neighbours, and check local rules if you're in a smoke control area.