To receive the AMCA seal, louvers must meet certain test criteria. The tests are based on a 48" x 48" size. The louvers are tested without birdscreens and must be mill finished. The water test is conducted at a rainfall of 4" per hour during a 15-minute period. The AMCA Certified Ratings Seal applies to air capacities in the intake mode only. See page 12 for complete free area information.
 

 
Adjustable Blades

These adjustable designs were developed for applications which require the control of air flow. The louvers can be operated manually, electrically or pneumatically. Jamb gaskets and blade edge seals are available on most models by request.

Manual operation can be accomplished with a hand crank, a pull chain with spring and wall clip, or a push rod attached to the operator unit. A fusible link option is available.  Electrical operation utilizes motors which can be adapted to individual requirements. Pneumatic operators are also available.

Adjustable Dual Combination Blade (Drainable)

The Model 667/71 louver combines fixed and adjustable blades in a single frame. Air flow control is provided while the exterior appearance remains similar to most fixed louver installations. It provides excellent weather protection, very low water penetration and high free area. Blade edge and jamb seals are standard. The louvers can be controlled manually, electrically or pneumatically.

The cost of purchasing and installing Model 667/71 louvers can be significantly less than the cost of adding an adjustable louver to the back of a fixed wall louver.

 Industrial Louvers, Inc., certifies that the Model 667/71 shown hereon are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 511 and comply with the requirements of the AMCA Certified Ratings Program. The AMCA Certified Ratings Seal applies to air performance ratings and water penetration ratings.