Seattle Home Inspector's Blog

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A very screwy furnace filter!

This is a picture of the opening to the air filter on a furnace.


Non-functional furnace filter
If you know what a furnace filter looks like---and hopefully all of you with forced air heating systems do—the thing you will notice is that it is flat against the side of the plenum (duct).  This should tell you that it cannot possibly be functional.  This type of filter is designed to be installed across the inside of the plenum either diagonally or flat. 

In this instance, as you can see in the next picture, because very long screws had been used to attach and exhaust vent pipe to the same plenum, the filter could not be installed properly and had likely been like this for the 6 year life of the heating system.


Screws prevent installation of filter
This type of filter, in general, is not very effective, but installed in this manner might as well not be there at all. 

It is time to get the HVAC contractor to fix the issue so that the filter can be properly installed.

Charles Buell, Real Estate Inspections in Seattle

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Seattle Home Inspector

 

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Comment balloon 9 commentsCharles Buell • April 27 2015 09:15AM
A very screwy furnace filter!
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This is a picture of the opening to the air filter on a furnace. If you know what a furnace filter looks like---and hopefully all of you with forced air heating systems do—the thing you will notice is that it is flat against the side of the plenum.. more
I am not Superman---I actually CANNOT see through walls.
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This post will be an attempt to clarify the title of the post. While this simple fact may seem obvious, we constantly hear stories about what the inspector should have been able to see, superman style, when the remodeling starts. In the best of… more