HVAC (41)

Discussions Replies Latest Activity

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 18, 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

Where to install the vapor barrier for a finished basement?

I have an audit customer that is in the process of finishing his basement. The basement foundation walls are poured concrete. He has instal…

Started by Jim Klebes

7 Jan 25, 2013
Reply by Ken Watts

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 Tracy & 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

Hang-ups to utilizing Manual J,D & S

I'm looking for some insight into why HVAC contractors don't use the ACCA process for sizing and selecting HVAC and Distribution systems. I…

Started by Adam Flowers

42 Feb 26, 2012
Reply by tedkidd

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