A low maintenance, high quality exhausting system, the freezing tunnel exhaust system includes venturi-powered blower. The blower handles ambient air, whichQuickdraft tunnel exhaust systems eliminates ice buildup on exhaust fan impellers and reduces maintenance and exhauster replacement costs. The system reduces or eliminates blending of expensive treated room air and dilutes the exhaust air. The venturi can be washed down with a caustic solution.

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