Munters Corporation - Aerotech Ventilation Systems Dragonfly Quad door

From the innovation of Aerotech engineers comes the Dragonfly...a Quad Door damper currently available for the WF Series fans.

The patented four door design optimizes the fan's spiral airflow pattern offering unsurpassed airflow and energy savings!

The WF Series fans use high quality components and precise engineering to create a simple, high quality fan with optimal performance at the best price.

Drive Assembly

The cast aluminum drive assembly utilizes enclosed automotive style bearings and comes with a 7 year limited warranty. An aramid fiber V-belt provides superior durability.
 

Flush Mount Housing

Installs flush to inside Wall and Mounts between 4x4 posts, 5' on center. Inlet Guard does not extend into building and it is easily removed for maintenance.
 

Rugged Door Seals

Weather tight seals for energy savings. Outer edge of damper doors close tightly against a rugged bulb seal, not a cheap foam gasket. The Hinge area between the damper doors is also sealed unlike other Butterfly dampers.
 

Unique Door Springs

Constant force stainless steel springs allow the damper doors to open fully when the fan is turned on and close consistently when turned off. The constant force spring does not stretch or warp like a coil spring.