We are using Mitsubishi fan coil units on a project and provided a description of the permanent filter type in lieu of the MERV rating requested in the table for IEQc3.1. The reviewer has asked us to correct with the MERV rating and provide verification of it. Mitsubishi does not rate their filters, however, so can we use data from another manufacturer that has a similar filter with particulate removal rates indicated and approximate the MERV rating (these would equate to MERV 5 filters)? We are also wanting some clarification about any specific MERV rating requirement (6 or greater) for permanent filters, as an earlier thread seems to indicate there is none. Grateful for any feedback!