With low surface temperatures, natural convection and large fin areas, this heater operates cleaner and quieter than fan forced systems. Heats and cools more slowly, reducing room temperature fluctuations. Freeze-proof liquid solution is sealed permanently inside heater element; won't evaporate and never needs replenishing. Automatic thermal shutoff protection. Easy installation. Mounts flush to wall at floor level or can be mounted above the floor for vacuuming or cleaning of the floor. White finish. Thermostat not included. UL (Underwriters Laboratories) listed.