John C. Semmelhack's Discussions (17)

Discussions Replied To (15) Replies Latest Activity

"Mitsubishi has a refrigerant-to-water heat exchanger in their City-multi VRF lineup,…"

John C. Semmelhack replied on Wednesday to GSHP for domestic Hot water

2 on Thursday
Reply by William H Nickerson

"I agree with David Butler...it really depends on the inputs into the model as well a…"

John C. Semmelhack replied May 19 to HERS score with HRV

9 Jun 7
Reply by Nicholas Burger

"From the article: "Lynae Forbes, president and principal broker at Hasson Company Re…"

John C. Semmelhack replied May 10 to Portland home energy scores not so hot

4 May 10
Reply by tedkidd

"I agree with David. All of the tightest houses I've tested have used Therma-tru door…"

John C. Semmelhack replied May 2 to Fire Rated High Performance Doors

3 May 2
Reply by John C. Semmelhack

"I've tried out most of the available residential energy monitors over the years and…"

John C. Semmelhack replied Jan 9 to Experience with new energy monitoring tools such as Curb, Sense, Nerio and Smapee

23 May 16
Reply by Tom Roth

"https://retrotec.com/products/flow-finder-mk-2-best-powered-flow-hood "

John C. Semmelhack replied Oct 24, 2017 to Replacement for Energy Conservatory Flow-blaster

1 Oct 24, 2017
Reply by John C. Semmelhack

"For multi-split systems from the quality manufacturers, plan on roughly $2,500-3,000…"

John C. Semmelhack replied Feb 12, 2015 to Whole-house Ductless Mini-split install costs

6 Jun 29, 2015
Reply by Robert Bass

"Graham, The U.S. is catching up to Germany very quickly on solar installs. As of the…"

John C. Semmelhack replied Oct 23, 2014 to How does efficiency factor into a grid parity world?

5 Oct 26, 2014
Reply by Bob Blanchette

"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

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Energy Auditing Equipment for Sale, Trade or to Purchase

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Franco Oyuela commented on John White's blog post HVAC Maintenance Checklist for Spring Cleaning
"As with a traditional air conditioner or heat pump, ductless mini splits require routine…"
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Don Fugler replied to Tom Phillips's discussion Kitchen Ventilation Resources in the group Kitchen Ventilation
"Another good publication written for builders/renovators/HVAC professionals was Chris…"
Thursday
Robert Bean replied to Robert Bean's discussion Low velocity consequences in the group Kitchen Ventilation
"Hi Chris, Today there is no research that I can find to support less than 500 fpm. As I noted above…"
Thursday
Robert Bean replied to Robert Bean's discussion Low velocity consequences in the group Kitchen Ventilation
"Hi Tom, All good comments and questions that need to be explored for residential systems. We have…"
Thursday
Chris Stratton replied to Robert Bean's discussion Low velocity consequences in the group Kitchen Ventilation
"Seems like high velocity and low noise are at odds with each other. And one of the biggest…"
Thursday
Matt Sharpe replied to Bob Reuther's discussion log home roof insulation
"Agree that its hard to help without more information. Pictures? IR images? Do IR images show air…"
Thursday
Tom Phillips replied to Robert Bean's discussion Low velocity consequences in the group Kitchen Ventilation
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Bob Reuther replied to Bob Reuther's discussion log home roof insulation
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Kitchen Ventilation

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