HVAC (52)

Discussions Replies Latest Activity

Underground ductwork

Do you think the air loss will be minimal in the following situation Underground duct with some separation at the joints, trenched and enc…

Started by Kevin

19 Oct 8, 2013
Reply by Bob Blanchette

Cooling His Room With a Big Refrigerator - What is Wrong with That?

       It was very hot this July 4th for Peter when his room AC broke down.  Nothing taste better than a cold beer from the refrigerator.  …

Started by Perry Ning

5 Sep 14, 2013
Reply by Perry Ning

Super Seal and Dry R

Hi, I installed my York system 2 years ago July 2011 and this month I found ice on my coils, I have 3.5 ton system with new refrigerant lin…

Started by George Gereis

3 Sep 13, 2013
Reply by James White

Air Handler Fan Speed

As much as I would like to say I am an expert, I am not when it comes to the actual performance and settings of a residential gas furnace a…

Started by Joshua Lloyd

15 Jul 8, 2013
Reply by Eric Kjelshus

Geothermal real-world performance

I've heard that measured performance of actual, installed geoexchange systems can be much lower than advertized COP numbers. Is anyone awar…

Started by Doug Horgan

32 Apr 19, 2013
Reply by Terry D. Davenport

New furnace causing interference with AM radio?

I just wrapped up a quality assurance site inspection where I heard something unusual. The homeowner had a new furnace & central air co…

Started by Nick Helmholdt

9 Mar 25, 2013
Reply by Nick Helmholdt

Trends in space conditioning systems in high performance homes, looking for your insight

Can anyone comment on the common types of heating and cooling systems installed in their region in high performance homes?  More and more,…

Started by Brennan Less

4 Jul 1, 2012
Reply by William H Nickerson

Gas Furnace in an Attic: To Replace or Not

I have a client with an open combustion gas furnace in their attic. They recently had the attic spray foamed at the roof and end walls (enc…

Started by Patrick Michaelyan

12 May 10, 2012
Reply by Bruce Navin

Section 403.2.2 of the 2009 IECC

We've received a lot of calls of (panicked) HVAC contractors on this new code requiring duct leakage testing. Can anyone shed some light on…

Started by Krista & Matt

11 Mar 22, 2012
Reply by Bob Blanchette

Adding return air from a heated basement in a high radon area

When building my house in CT, return air ducts are not put into basements because of radon, at least along the coast where radon levels are…

Started by Gary Baggett

3 Feb 29, 2012
Reply by Gary Baggett

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Kevin Miller replied to Bob Krell's discussion What Do You Do When You Find Suspected Mold? in the group Healthy Indoors (IAQ)
"Visual inspection can only confirm the presence of mold, not the absence.   That said,…"
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Armand C Magnelli replied to Don Fugler's discussion joining ducts in the group HVAC
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Kevin Miller replied to Bob Krell's discussion What Do You Do When You Find Suspected Mold? in the group Healthy Indoors (IAQ)
"Sampling would be primarily to verify 'Condition 1' or 'Normal Fungal Ecology'…"
3 hours ago
Daniel Cullen joined Building Performance Institute's group
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Daniel Cullen replied to Bob Krell's discussion What Do You Do When You Find Suspected Mold? in the group Healthy Indoors (IAQ)
"Can anyone tell me exactly HOW mold sampling impacts the mold remediation process or protocol? Why…"
3 hours ago
Daniel Cullen joined Bob Krell's group
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Healthy Indoors (IAQ)

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