[wisepole]

I need to reduce static pressure to approx. .5 from .7 or .8. EAC, media cleaners are not possible due to limited space available. No further tuning of furnace is possible. Removing these 2 from the equation, I am left with the following options:
1. Increasing the orifice from 16x20 to a bigger sized air filter (max 20x20) but would mean some amount of duct cutting and funnelling and frankly I don't think it'll give me a much of a difference considering the time and effort I'll or whosoever spends.

2. Increasing the depth of air filter from currently 1" to 2" which will require much less effort than (1) above.

3. Doing (1) and (2) together is not possible.

4. Installing a 1" EAC filter proposed by a reputed HVAC. The issue is it runs into quite a few Benjamin and have been told it is around .18 WC

Question 1: Upon researching here and elsewhere I have specs for 2 air filter companies which seem to be good. The problem is they publish different type of data and I don't have the knowledge to compare them. Thus, need your help.

Camfil Farr 30/30 for 16x20 states a CFM of 780 and for 2": 1110.
GlasFloss Z-line HV series for 1" states (16x20):
Rated Velocity FPM: 300, WG: .18, Sq Media Ft: 4.32, Init. Resistance Pascals:44.8

Can you help me understand which is better and in comparison with the 1" EAC too?

 

[wisepole]

Z-line: http://www.glasfloss.com/Pleated 2010.pdf
Cami: http://www.camfilfarr.us/WebBase/wbftp/documents/46031.pdf

 

[wisepole]

Nice article for PROs

http://eetd.lbl.gov/ie/pdf/LBNL-3164E.pdf

 

[wisepole]

Sorry, but any leads you folks might be able to provide?

 

[skippedover]

How do you know the filter is the problem? What's the system TESP without a filter? What's the system TESP with the blower door removed? Absent this info, you could be chasing a ghost and wasting money. The answer is really quite simple for you. Hire a company that is intimate with troubleshooting a high static problem and invite them to quote you on repairing the issue. Unfortunately, our industry is rife with wannabes and peeps who are just trying to collect money but are unwilling to get the extensive education necessary to do the job properly. The end result is frequently high static. I measured the static on a brand new Trane system just yesterday. It operated with 52°F delta tee, which was within manufacturer's spex (45° to 65°F) but the static was .72 with a clear statement on the data plate that the maximum external static pressure should not exceed .5 IWC! Oops. Somebody didn't know Manual D. But then, the furnace was oversized as was the AC system. So...No Manual 'J', no Manual 'D' = high static, discomfort and high energy bills. But the GC got a low price on the install. See how it works?

 

[wisepole]

I had all that measured professionally. With filter at .7, without filter at .55. Even blower speeds were tried but had impact to the delta-T and thus was maintained at manufacturer's specs.

 

[wisepole]

What's XX WC and can someone explain the relation to velocity and CFM?

 

[beenthere]

Almost any 1" media air filter that is rated at MERV 8 or better, will have a .15" PD(in your filter size and at your CFMs.

Either a larger filter, and or return duct. or use a MERV 6 filter.

 

[wisepole]

Thanks. I've done some reading and the issue I am facing is on on hand I am reading at a lot of threads generally a 2" filter is better than 1" since it has more effective surface area and considering all things are same would reduce static. However, when checking manufacturer's site 1 see (for example, just example) a 1" having .18 WC while 2" .24 WC. Not sure, but I think higher the WC *whatever that is* the worse the flow ??

 

[wisepole]

Almost any 1" media air filter that is rated at MERV 8 or better, will have a .15" PD(in your filter size and at your CFMs.

Either a larger filter, and or return duct. or use a MERV 6 filter.

Can I also consider a 2" instead of 1" filter? .... Against your "Either" considerations? Just asking...

 

[beenthere]

A 2" filter generally last longer, but at the same 16X20 size, the beginning PD won't be any lower.

Post a pic of your furnace and the return duct, including the drop.