Particulate Matter Removal

Paula Hernandez

MRS.

PAH&A

LEEDuser Premium Member

58 thumbs up

January 10, 2012

Hi to all of you, as per Standard 62.1-2007, in Section 5.9, one of the minimum requirements for mechanically ventilated spaces, a MERV 6 filter shall be provided upstream of all cooling coils. ..., How strict is this situation if the units are VRF evaporators?, since they have very little pressure available and the filters would cause a big drop of it. thank you

Post a reply

Dylan Connelly

Mechanical Engineer

Integral Group

LEEDuser Expert

342 thumbs up

Tue, 01/10/2012 - 16:16

We have run into this on a number of projects. As this is a pre-req we have not pushed back on this requirement and always included at least MERV 6, but usually MERV 8 filters. Consider: Oversizing the ductwork (if there is any) will help reduce pressure drop, creating an oversized plenum filter box to reduce the FPM across the filter, or select a higher static VRF unit.