Need an extra boost of heat? Our Double Universal Air Mover Heaters are a great addition to any heat package. The Double UAH includes an adjustable digital thermostat, and two individual 7.5 Amp 115V heating elements in one functional design. This spring loaded, self locking heater attaches to virtually any air mover fan turning that fan into a mini heater. The Double UAH is best suited as an add on to your current heating equipment but can treat areas under 100 square feet by itself. A four pack of Double UAH's and four air movers can effectively treat areas up to 400 square feet.