We had many more questions than time during Peter Pfeiffer’s webinar on Indoor Air Quality in the GreenExpo365 Auditorium (now available there “on demand”), so he made time to sit down again with us to finish answering them. Our thanks again to Peter (www.barleypfeiffer.com).

___linkMap-0___Audio Response #1 (Pfeiffer)
Questions include:
Can the UVC lighting be left on - other then bulb life, are there any disadvantages to keeping it on?
Please discuss too much glass.
Are you concerned with trapping moisture between closed cell foam and the roof deck?
How do you ensure that the fan is able to push the HEPA filter?

___linkMap-1___Audio Response #2 (Pfeiffer)
Questions include:
Say a word about roofing finish materials: i.e. shingles vs. metal roofing - advantages and disadvantages…

___linkMap-2___Audio Response #3 (Pfeiffer)
Questions include:
How long (on average) does it take for traditional bldg. materials to offgass (paint, carpet, glues, etc)?
I saw a program that said that even though the UV light is on it looses effectiveness over time. Without a UV meter is there any way to tell if your UV light is still effective?

___linkMap-3___Audio Response #4 (Pfeiffer)
Questions include:
On a parapit style roof the A/C ducts are run in a soffit, how do you detect and seal those ducts?
When you are talking about spray foam insulation is it implied that they are Low or No VOC type foam?
What do you think about the difference between open and closed cell foam?

Other questions:
Why we can't have ducts in frameworks? – “It is very hard to make them air tight”
How can we get a copy of your window tape/ flashing detail? – The sketches are not available for all, but EEBA (The Energy & Environmental Building Alliance – www.eeba.org ) has great resources similar to what was used in the presentation.