Give Your Heating and Cooling System a Boost! The Amazing AirFlow Breeze works with your existing central heating and cooling system, drawing additional air to the problem areas in your home. Once you set your target comfort level, the built-in temperature sensor takes over! It will direct the powerful, yet quiet fan to pull extra warm or cool air out of weak registers, increasing air flow, and delivering the comfort you demand. By improving the air flow from your existing central heating and cooling system, the AirFlow Breeze provides an affordable alternative to window air conditioners, space heaters, costly attic fans and complex zoning systems. That's right! Increase your comfort, and save money too! To get technical for a moment, your furnace and air conditioner bring comfort to your home by moving air through ducts to each room in your house. When the fan from the main system cycles off there is still conditioned air lingering in ducts and crawl spaces. The AirFlow Breeze pulls this conditioned air to your rooms, keeping them more comfortable longer, so your furnace or air conditioner will run less often, lowering your utility bills! It's easy to install, with no tools necessary, fitting into most standard vent openings. Best of all, it's safe for children and pets due to low voltage operation. And don't worry, the stylish AirFlow Breeze blends into any room decor. Available in Almond or Brown. Fits into most standard 4 x 10 vent openings. Assembly"