Double L’s New TopJet Gravity Insulated Shutter minimizes air leakage and seals up tight with no cracks or spaces for air to come through. Double L’s patent pending design has counterweight louver blades made of ¾” insulated board encased in fiberglass with an R-value of approximately 6; whereas the standard shutter has no R-value. The counterweight louver blades are uniquely designed to open from the top, directing airflow up. When static pressure is created by ventilation fans, Double L’s TopJet Gravity Insulated Shutter blades automatically open to exhaust the air. When fans stop, the counterweight closes the louver blades.
Multiple infrared tests have shown a 20+ degree difference between the TopJet Gravity Insulated Shutter and the standard shutter - providing great energy savings, safer environment for animals, and less buildup of moisture in buildings.
The TopJet Gravity Insulated Shutter design allows for tremendous energy savings and because of its insulation value, it is unique to the livestock industry.
Double L’s TopJet Gravity Insulated Shutter has been BESS Lab tested for accurate performance and is easy to assemble and install. The TopJet Insulated Shutter is currently available in 2 sizes.