4 Inch Vs 1 Inch Furnace Filters. A 4 inch furnace filter will last a. You certainly don't want the return pulling any air or exhaust from the water heater.
This size isn’t as common as 1” or 4” filters, but they are available. You can ensure that a larger filter would work/fit by checking the actual size for the 5 filter you are considering. I also know how stats like that can be scewed.
So Another Question About A New Install.
Stores sell filters with those specific dimensions (i.e., 16x25x5) specially designed to fit. The reason you want to use the appropriately sized filter is straightforward: Furnace filters are available in thickness that range from to 1 inch to more than 4 inches.
The Best Thing To Do Is Upgrade To A 2 Inch Filter Or Even A 4 Inch Filter.
Many cabinets allow for either a 1 inch or a 2 inch filter. You certainly don't want the return pulling any air or exhaust from the water heater. A 4 pleat has a dramatically lower pressure drop and are good for about 6 months.
There Are Some Benefits And Some Disadvantages:
1 inch furnace filters, pressure drop and high merv. Just adding a 1 inch pleated filter may be detrimental to your system if it is border line already. A furnace filter is used to protect your furnace motor and a/c coil from getting dirty, nothing more.
Common Sense Tells Me That A 4 Filter Would Certainly Trap More Particles Than A 1 Filter, But I Have A Few Questions.
Naturally, the denser the filter, the more material the air has to pass through before it reaches the inside of the furnace. I have been told 4 captures 80% of particles vs. I also know how stats like that can be scewed.
So The 4 Inch Will Last Longer Between Changes.
The five inch filter would be 1/8 smaller in the 16 direction, not too bad, although. A 1 pleat is good for only 1 month. I was at a friend’s place on the weekend and noticed he’d purchased a case of four 16 x 25 x 4″ thick merv 8 furnace filters, and rose at the opportunity to ask him to cut one open and measure the length of the filter fabric.
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