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FAQs about IEQc1.4 :

Is it true that MERV 13 filtration is no longer required for return air circulation?

Can we earn this credit by adopting a phase-out plan of our old filters and replacing them with MERV 13 filters?

Can we use pre-filtration in combination with filters that are less than MERV 13 in order to earn the credit? For example if we use carbon pre-filters combined with MERV 11 would that work?

We are working on a project outside of the U.S. What options do we have for an alternative but equivalent standard to the MERV 13 filter.

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Forum discussion

EBOM-2009 IEQc1.4:IAQ Best Management Practices—Reduce Particulates in Air Distribution

Non-compliant pre-filters

I am working on a project with several large outdoor air handlers. Each air handler has a system of MERV 8 pre-filters followed by MERV 13 main filters. Would this credit be achievable considering the current set-up? Thank you.

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Profile picture for user tristanroberts
Tristan Roberts
Representative
Vermont House of Representatives
LEEDuser Expert
7780 thumbs up

Wed, 07/17/2013 - 18:22

Eddie, according to the credit language (see above), you simply have to use MERV 13 filters prior to air being introduced to occupied spaces. So I don't see any problem with your situation.
Profile picture for user dconnelly
Dylan Connelly
Mechanical Engineer
Integral Group
LEEDuser Expert
342 thumbs up

Thu, 07/18/2013 - 14:20

Eddie, Tristan is correct. This complies and is actually a very typical situation. The pre-filters are there to lengthen the life of the more expensive MERV 13 filters.

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