Wood Burning heaters are ideal if you prefer the crackling ambience
of a real fire. They are very effective in heating up bigger spaces and
are recommended for large saunas, such as 6-person saunas (84”) or
larger. 

Requirements: Wood-burning heaters require an additional chimney kit, and are only appropriate for outdoor use.

A propane or natural gas heater is an excellent choice if you are
looking for a steady heat source that doesn’t require wood or an
electrical hookup. Propane and gas heaters provide a thorough heat and work much the same way as electric sauna stoves – fed by a gas line or propane tank, a metal plate is heated which warms the sauna stones and heats the space to a toasty 190F.

Requirements:
Requires a natural gas line or propane tank.