Must Vbz be met for all zones in a multizone system? Section 6.2 states that the VRP procedure is for determining Vot and not Vbz.

Can an air conditioned space that has operable windows earn minimum IAQ performance prerequisite by demonstrating the compliance with natural ventilation requirements? Kindly advise.

For our project, the canteen was designed with an area that would give an occupancy of 1400 people if we were to follow the default ASHRAE 62.1 occupancy, which is very high given the fact that abo

Can someone help me with exception "b" of mandatory section 6.4.3.9 in 90.1. What is meant by the following: b.

Hi, our commercial building uses both mechanical and natural ventilation.

Hello, Our building is a multifamily building project and my question is, are we still required to complete the VRP calculations for this prerequisite?

Hi! When two or more fancoils meet the same area, can be considered as a single zone, correct? Thanks!

Hello, Our project is a residential building and will have no mechanical ventilation in the apartments. For this case, LEED asks us to comply with ASHRAE 62.1-2007 paragraph 5.1.

I've gotten a few reviews back recently that request clarifications based on the following: "Please note this form appears to use the default occupant densities from ASHRAE 62.1-2007 Table 6-1.

Hi! can i use a hi-wall in my project? The hi-wall don't have a merv 6 filter, but the outside air in the environment have. thanks!