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damper
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  1. HVAC
    We installed Panasonic bathroom fans in a property and when there is a slight wind outside, the pressure drop will ever so slightly pull on the plastic flappers just enough so they come up and then back down with a little thud. It sounds sort of like having a constant drip of water falling...
  2. Masonry
    I have a client that is looking to close off the damper and make the flue weather proof put wants to leave the firebox open to place flowers or candels in. Is this possiple? If so what is the best method?
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