is it always better to use a thicker filter in furnace?

[Bob F]

Why else would they pleat filters?

[Caesar Romano]

On Fri, 24 Oct 2008 00:07:54 -0700, "Bob F" wrote Re Re: is it always better to use a thicker filter in furnace?:

No, a thicker filter is like to thinner ones in series, one behind the other.

[Rick Brandt]

Incorrect when the thickness is achieved by larger pleats. The actual filter *material* is the same. Bigger pleats in a thicker filter "container" means more area and less resistance.

[Bob F]

That's it.

[dpb]

There's double the additional structural material too...I'm still not convinced the dP goes down at all, it just may not go up much...

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[jmeehan]

It is impossible to say from the information provided. The type of material the design etc all make differences. The most important factor is to make sure the filter meets the specifications given for your furnace.

Personally I believe far too much worry is made about filters. You need to meet the specifications for the furnace to protect it, but you should not really expect some sort of real change in air quality in your home because you use this or that air filter. Most of the advertising related to air filters or all kinds are all fluff. They don't provide any evidence that the products advertised add anything to the quality of life in the home where they are used.