Dear all, I actually do know what is an absorptive material but only by logic/sense.

Our MEP sub-contractor need to clarify if we can use an smoke capsule for duct leakage test, prior to final air leakage test since the project specs is giving a small allowable 1% from basis of des

I have a project that don't use any HVAC system. It's all natural ventilation. Is it ok to left the HAVC protection out since there is nothing to protect.

Hi, I have a question regarding the upload requirements: the form asks for Upload IEQc3.1-1.

Hi all, We are not going to provide photos for this credit but we have an IAQ plan developed and the contractor has been following it according to the credit requirement.

I recently opened the LOL V3 NC form for IEQc3.1 and found that Table IEQc3.1-1 has three new columns - CEN Rating, Min Dust Spot Eff and Arrestance in additon to the MERV rating.

We are building a new building with concrete precast wall and roof panels with a concrete slab-on-grade.

SMACNA standard recommends under Pathway Interruption (IAQ Management Plan) that : "Depending on weather conditions, the contractor should ventilate using 100% outside air to exhaust contaminated a

Hi. At what moment of a project does the IAQ reporting need to occur?