John C. Semmelhack's Discussions (7)

Discussions Replied To (7) Replies Latest Activity

"HVAC contractor (ideally) drills the 1" hole, then tapes over afterward.  I investe…"

John C. Semmelhack replied Jan 24, 2013 to Measuring fresh air intake ducted to a return and no way of measuring from outside.

22 Feb 7, 2013
Reply by Dale Sherman

"By the way...not sure what climate you're in, but someone should probably should ins…"

John C. Semmelhack replied Jan 24, 2013 to Measuring fresh air intake ducted to a return and no way of measuring from outside.

22 Feb 7, 2013
Reply by Dale Sherman

"There are in-duct measurement techniques that are accurate enough for this purpose.…"

John C. Semmelhack replied Jan 24, 2013 to Measuring fresh air intake ducted to a return and no way of measuring from outside.

22 Feb 7, 2013
Reply by Dale Sherman

"Why are you wondering how much airflow occurs at this intake?   1) Required for Ene…"

John C. Semmelhack replied Jan 24, 2013 to Measuring fresh air intake ducted to a return and no way of measuring from outside.

22 Feb 7, 2013
Reply by Dale Sherman

"Dan,  Good to hear you're evaluating the reduced airflow form the CAR's. I'm intere…"

John C. Semmelhack replied Nov 20, 2012 to AirGenerate Heat Pump Water Heaters - any experience?

5 Nov 20, 2012
Reply by John C. Semmelhack

"Dan,  Have you measured the drop in efficiency/capacity caused by reducing the airf…"

John C. Semmelhack replied Nov 16, 2012 to AirGenerate Heat Pump Water Heaters - any experience?

5 Nov 20, 2012
Reply by John C. Semmelhack

"Yes, this can be done and is done.   Many of the ductless heat pump manufacturers ha…"

John C. Semmelhack replied Nov 10, 2011 to DHPs in MF projects

5 Nov 13, 2011
Reply by Pam Worner

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