Electronic Air Filter Size

[buddro]

I have a 4 ton unit, just curious what size electronic air filter I should be looking at. I am interested in the Honeywell F300e model.

Is a 16x25 to small? Is a 20x25 to big?

Thanks,

[beenthere]

The 25 x 16 is rated for a max 1400CFM.

You want the 20 x 25.

[buddro]

Looks like my HVAC guy has a slightly used 16x25 one for a great price....

Is there an downfall to putting in the 16x25 vs the 20x25 for my 4 ton unit?

[beenthere]

Won't filter as good as you want.

So it kind of defeats the purpose of having it.

[buddro]

Beenthere,

Just curious, why won't the 16x 25 electronic filter as well? Too much air going through it?

My blower is a 2000 cfm blower, the 16X25 filter allows 1400 cfm, is this a problem? Will this "choke" the system?

Am I getting confused with this system? Will the blower only get 1400 cfm of air to push with the 16x25?

Thanks,

[beenthere]

The velocity will be too high, for the filter to be effective.

Like a car that is rated at 30 MPG on the highway.
Thats at a speed of say 65MPH. Drive it at 90MPH, and you'll be lucky to get 18MPG.