Ask Your Question

Angie's List Answers is the trusted spot to ask home improvement and health questions and get answers from service companies, health providers and consumers. For ratings and reviews on companies in your area, search Angie's List.

 
 
or
Submit
Top 30 Days Experts
Rank Leader Points*
1 kstreett 240
2 Guest_9020487 110
3 Guest_9190926 105
4 GoldenKid 100
5 ahowell 95
6 KnowledgeBase 95
7 skbloom 80
8 Guest_98024861 70
9 Guest_9311297 70
10 Guest_9400529 70

*Updates every 4 hours

Browse Projects By Category

Question DetailsAsked on 10/1/2013

air filters in HVAC systems--effective?

Do you have the same question? Follow this Question


2 Answers

0
Votes

You seem to have two identical posts on the same question - answers given at other post here -
https://answers.angieslist.com/Are-ai...

Answered 6 years ago by LCD

0
Votes

The better efficiency rated filter has better filtration.The MERV is a standard rating and the higher MERV number (from 1-20) indicates the efficiency. A high filter rating is not practical if the filter is too small The filter will load too quickly. Then the system will suffer due to low air flow. The rule of thumb for filter surface that I use is 144 square inches per ton of air conditioning capacity. My 3.5 ton unit in So. Cal. has a 600 (20x30) square inch filter grille. I installed that size filter grille so I can use a high efficiency filter and the system air flow is at the recommended cubit feet per minute. The original filter grille would only accomodate a 20x20 inch filter.

Source: Experience

Answered 5 years ago by PoppyRoss




Related Questions


Terms Of Use
|
Privacy Policy