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BROAN-NUTONE 514L 4' x 25' Metalized Air Connector
- Manufactured in United states
- Easy to use
- Highly durable
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4 inch x 25' metalized air duct connector, puncture resistant laminated metalized polyester product, used when insulation is not required, permits duct to be used as an entire system or to connect boxes, diffuses, inlets or other terminal Devices, carries UL label 181, class 1 connector.
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Most helpful customer reviews on Amazon.com
There is a significant amount of heat loss, up to 20 degrees F. There are several reasons that this occurs that probably aren't the fault of the hose. First the difference between ambient temp outside and that of a conditioned space (our houses) allows for some heat loss. Additionally I am pushing the air through the tube with a computer fan at each end so perhaps the air is spending too much time (moving too slowly) cooling down in the tube???
So, I can't definitively blame the tubing, but I did expect much less heat loss for a seemingly well made product.