Sauna Heart - Humidifier tube (9 3/4" x 3 3/4" diameter.) to put in heater adds constant humidity to Sauna room. Stainless steel tube is inserted between heater elements and filled with water to create constant humidity for about a 25 min. period.
It creates softer, more humid, and more enjoyable air. Not for use in AV or JM type heaters.
