Cold floors are the problem the Sauna Next Heat Circ Cedar is built for. This heat circulator draws heated air down from the upper bench area toward the floor to even out the temperature gradient. It suits indoor and outdoor saunas up to 350 cu ft per unit and surface-mounts to a flat vertical wall with 8 screws.
Its cabinet is solid 3/4" western red cedar in a natural cedar finish, fronted by a rustproof grill. According to Sauna Next, floor temperature can rise by 40°F or more, with the fan running under 50 dB. A handheld remote with an LED speed indicator offers 10 speed settings, and power is 110V, ideally from a GFCI-protected outlet. Made in the USA.