**I did post this under the IEQc3.1 credit in Schools, too. My project is a school, but I wanted to make sure this question was seen, as my question is not "school only".

I am working on a project with an IAQ plan that was followed during construction.

We have a residential project that wishes to apply for LEED-NC, due to climate conditions no HVAC system will be implemented and 100% of ventilation will be natural (no mechanical equipment at all)

Hello - I'm working on a project in Japan, and the MERV rating system is not used here.

Reference guide Addenda allows to use filtration media with a minimum dust spot efficiency of 30% or higher and greater than 90% arrestance on a particle size of 3–10 "µg". I suppose it is "µm" no

We are currently working on a LEED project where we are using temporary direct fire natural gas heaters for winter heat.

We are applying Carpets for flooring. Can we install the carpets, and cover them then install electric fixtures for the ceiling.

What is the criteria for triggering duct testing and cleaning reports for both plans?

The contractor would like to install the HVAC equipment although the roof is not on the building yet.