Older-style whole house fans can be a significant source of heat loss in winter if the shutter doesn't seal well. Insulated models use a motorized, gasketed door that seals tightly when the fan is off, addressing this concern -- a common upgrade for Northeast Ohio homes that experience real winter cold alongside hot, humid summers.

  • Motorized, gasketed door seals tightly when fan is off
  • Reduces winter heat loss compared to older shutter-style fans
  • Suited for climates with both hot summers and cold winters