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.

My Mechancial Contractor for a project submitted an IAQ Plan referencing the National Air Duct Cleaning Association's procedures for cleaning ductwork. I know that the IEQc3.1 is based on SMACNA.