[Shop-talk] Furnace Filters

[John Innis]

The only real issue is that you will not get as much airflow through a 1"
filter of a given effectiveness.  Most of the time that's not a big deal.
In our previous house we did have an issue with the AC freezing up when it
was working really hard.  In that case the solution was a lower
effectiveness filter because the box could not accommodate a thicker
filter.  If you are happy with the performance of the 1" filter and have
not had any issues, i'd say stick with it.  I do NOT recommend stacking two
one inch filters.

On Mon, Dec 13, 2021 at 4:20 PM Jim Stone <1789alpine at gmail.com> wrote:

> The company that installed my HVAC system a few years ago used a filter
> box on the return line that takes 20” x 25" x* 4”* filters, which is an
> unusual, and thus expensive, size - filters generally run about $25 each -
> that is not readily available other than online.  During construction, my
> general contractor just had a cheap 20” x 25" x *1” *filter in there that
> seemed to work just fine.  I checked the installation instructions for the
> furnace and there are no specifications for the filters, other than that
> they need to be changed regularly, which is getting pretty expensive.  Is
> there any reason I couldn’t just use 1” filters, which are less than half
> the price?  Maybe even put two of them in the box, a good one first to
> catch most of the dust and a cheap one like the contractor used as a
> secondary one.  It is a snug fit and I don’t think there is any danger of
> them tipping, but two would make it impossible.
>
> Thanks,
> Jim
> _______________________________________________
>
> Shop-talk at autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation  $12.96
> Archive: http://www.team.net/pipermail/shop-talk
> http://autox.team.net/archive
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/shop-talk/jdinnis@gmail.com
>
>

-- 
=================================
= Never offend people with style when you   =
= can offend with substance --- Sam Brown  =
=================================
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/shop-talk/attachments/20211213/d28d7ca0/attachment-0001.htm>