$29.98

Stops turbine heat loss in winter. Opens in warm weather, closes in cold weather. It's automatic! Turbine attic ventilators suck warmth from your rooms during winter. The Turbine Boss fixes this problem. Lowers your heating bills. Just install it and forget it! The Turbine Boss - Automatically Stops Turbine Heat Loss in Winter Building Materials Ceilings & Attics Ventilation Wind Turbine