John C. Semmelhack's Discussions (9)

Discussions Replied To (9) Replies Latest Activity

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

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

4 Feb 19
Reply by Jose Macho

"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

"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

RSS

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.  Home Energy Pros is sponsored by the Better Buildings Residential Network.

Latest Activity

Rick Karg replied to Carly@AirCycler's discussion The (Small) Cost of Ventilation Without Recovery
"As a member of the ASHRAE 62.2 committee (and president of Residential Energy Dynamics, the author…"
Friday
Bradford E. White replied to Elizabeth Guinn's discussion ERV in need of backflow preventer.
"I would use an in-line backdraft damper such as Artis Industries or the ones made by Fantech and…"
Thursday
Kim Tanner posted a video

Wireless Air Leakage Testing

This webinar will discuss the use of WiFi technology to conduct and document blower door and duct leakage tests for compliance with local energy codes. The s...
Thursday
Profile IconPerry Grossman, Daniel Pate and Ottawa Furnace Filters joined Home Energy Pros
Thursday
Kirsten Richnavsky added a discussion to the group Building Performance Institute (BPI)
Thumbnail

Breaking the link between unhealthy homes and unhealthy kids

Listen in on IAQ Radio to a discussion on reducing the household triggers that cause asthmaattacks…See More
Thursday
Kirsten Richnavsky posted a discussion

Breaking the link between unhealthy homes and unhealthy kids

Listen in on IAQ Radio to a discussion on reducing the household triggers that cause asthmaattacks…See More
Thursday
Kim Tanner posted events
Thursday
Ottawa Furnace Filters posted a blog post

Some Useful Information about Furnace Air Filters

There is not much we can do about the air pollution outside of a house in Ottawa, Canada, but we…See More
Thursday

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service