The Perfect Balance is typically installed in a bathroom or mechanical room door for the purpose of providing make up air for the exhaust fan. Without make up air, the vent fan, bathroom fan or exhaust fan cannot do its job: removing moisture and odors or offering relief.
Return Air Pathways – RAPs – are installed in walls between rooms for the purpose of connecting the supply and exhaust in an HVAC system. They are designed to allow air to travel from room to room without compromising privacy. And just as important, they will balance your system and help eliminate hot and cold spots in the home even when doors are closed.