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Trigon

Joined: 1/12/01 Posts: 62194
Likes: 37859


Surprising that the box would see enough vacuum to flex/bang with a second


return also allowing air to enter the box (helping to prevent/break vacuum) ... was the second filter also in need of replacement?

Seems like a nice audible alert system to inform when filters are due for changing ;-)

(In response to this post by NJHoo)

Posted: 02/12/2020 at 1:27PM



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Current Thread:
 
  
HVAC puzzle for the DIY group -- NJHoo 02/12/2020 11:10AM
  You were all close -- NJHoo 02/12/2020 12:27PM
  The other return was just 12 x 12" -- NJHoo 02/12/2020 1:44PM
  Re: The other return was just 12 x 12 -- Trigon 02/13/2020 03:41AM
  The hi-tech filters do not let enough air-flow. ** -- Guy Caballero 02/12/2020 1:00PM
  Either metal expansion when the duct got hot, -- Trigon 02/12/2020 11:30AM
  Bang from the furnace or bang from a duct somewhere? ** -- MaizeAndBlueWahoo 02/12/2020 11:29AM
  Duct expansion? ** -- JohnHoo2 02/12/2020 11:15AM

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