HVAC (49)

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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

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

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

What is the best propane direct vent wall furnace available?

We are getting ready to do a major overhaul to about half of our house.  We currently heat with an old wood furnace tied to an oil furnace…

Started by Al Maloney

5 Feb 23, 2012
Reply by Paul Lasicki

Resnet and NATE and BPI

Resnet and NATE are joining forces to Come up with yet another "Certification" a WHOLE House Specialist. Don't get me wrong, It is a very g…

Started by randy tolowski

13 Feb 9, 2012
Reply by John Webb

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