Ever been to a house where you can see your breath in the living room, only to cross into the bedroom and have your glasses fog from the swampy heat? Prevent unwanted temperature differences (and a constantly running furnace) with Activent. This wirelessly controlled, individualized vent system helps maintain a toasty temperature throughout your home.

 

Replace existing vents with Activents to create heating and cooling "zones," taking control away from the central thermostat. Each vent opens or closes depending on the temperature it senses for the individually controlled room. The vents are available in various sizes and cost $74.99 each.