Check how thick the filter is with most roughly 1 inch thick.
Furnace filter pressure drop comparison.
How to replace a furnace filter.
On my next filter change i m going to repeat the experiment with merv 8 and 11 and see if there s a difference but my initial impression is that mpr is bs.
For this there are three primary codes.
Chart of filter pressure drop for filters with merv ratings from 2 to 13.
I tried it a couple times.
This one begins a series testing various furnace filters for their pressure drop when used in a real furnace.
But most people seem to have had no.
Furnace filters are replaced by measuring the width by the length.
Beyond all the other factors involved in choosing the best furnace filter focus most of your attention on the ratings.
The fiberglass filters have a 0 10 to a 0 13 drop going from 300 fpm to 500 fpm across the filter.
The pressure drop was the same.
Funny just ran across this test below comparison of different filters and it doesn t look good for any but the 1 simple fiberglass filters.
It is often very difficult to compare pressure drop for hvac air filters.
2009 they tested all the filters at the same width and height 16 x 25 but the depth varied.
Merv fpr and mrp.
Nordic pure reports the filter s pressure drop as 0 24 inch which puts it a shade higher than the similar merv 12 equivalent filtrete 1500 at 0 22 inch.
So a filter that measure 20 inches long by 25 inches wide would be replaced by a 20 x 25 filter.
In simple terms manufacturers of furnace filters perform testing to assess how well the filters block out or trap air.
Even though filter tests are standardized it is not unusual for the same type of filter to be tested in two different laboratories with two different results.
Tested the pressure drop across it pulled it out and replaced it with an mpr 1100 or whatever they say mercy 8 is equivalent to.
David springer home energy magazine article nov.
And speaking of filter pressure drop here s their chart for filters with merv ratings from 2 to 13.
