Hans Joachim Preiss's Discussions (18)

Discussions Replied To (18) Replies Latest Activity

"Dan, Let me attempt to compare apples with apples: My solar thermal system is locate…"

Hans Joachim Preiss replied yesterday to Net Zero Energy Hot Water

10 yesterday
Reply by Dan Antonioli

"I use the combination of solar PV and heatpump water heaters in the vast majority of…"

Hans Joachim Preiss replied yesterday to Net Zero Energy Hot Water

10 yesterday
Reply by Dan Antonioli

"I personally don't have an answer for you and would have to research the web myself.…"

Hans Joachim Preiss replied Nov 20, 2015 to Energy Efficient Entry Door options out there?

25 Nov 28, 2015
Reply by Tauran Ivall

"Most European hardware engages on all sides pulling the door into the gaskets evenly…"

Hans Joachim Preiss replied Nov 12, 2015 to Energy Efficient Entry Door options out there?

25 Nov 28, 2015
Reply by Tauran Ivall

"I don't perform any audits myself, but I came across this relatively new tool that m…"

Hans Joachim Preiss replied Sep 17, 2015 to What is the best energy auditing software?

18 Apr 12
Reply by Ben Meyer

"A hole dip tube would only play a role when hot water is drawn and cold water enters…"

Hans Joachim Preiss replied Sep 5, 2015 to Does calcification affect electric water heater aquastat temperature sensor performance?

19 Sep 24, 2015
Reply by tedkidd

"Rod, Because the tank is not overheating, the behavior is either normal for this tan…"

Hans Joachim Preiss replied Aug 27, 2015 to Does calcification affect electric water heater aquastat temperature sensor performance?

19 Sep 24, 2015
Reply by tedkidd

"Calcification happens on the heating elements because hardness causing minerals are…"

Hans Joachim Preiss replied Aug 27, 2015 to Does calcification affect electric water heater aquastat temperature sensor performance?

19 Sep 24, 2015
Reply by tedkidd

"Good discussion. I came across this comprehensive presentation by Gas Consultants on…"

Hans Joachim Preiss replied Jul 2, 2015 to Does altitude affect AFUE? or just the input/output BTUs?

25 Jul 15, 2015
Reply by Morgan M Audetat

"Rod, Correct me if I am wrong, but you're saying "AFUE" but really mean "actual effi…"

Hans Joachim Preiss replied Jun 26, 2015 to Does altitude affect AFUE? or just the input/output BTUs?

25 Jul 15, 2015
Reply by Morgan M Audetat

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Measured Home Performance: Assessment with a Infrared Camera

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Dan Antonioli replied to Dan Antonioli's discussion Net Zero Energy Hot Water
"Okay, a couple of things. The 1.0 kW per square meter reference is only under the most ideal lab…"
yesterday
Hans Joachim Preiss replied to Dan Antonioli's discussion Net Zero Energy Hot Water
"Dan, Let me attempt to compare apples with apples: My solar thermal system is located in…"
yesterday
Dan Antonioli replied to Dan Antonioli's discussion Net Zero Energy Hot Water
"Hi Hans, I don't know where you're located but where I am a 2.5 kw pv system costs closer…"
yesterday
Hans Joachim Preiss replied to Dan Antonioli's discussion Net Zero Energy Hot Water
"I use the combination of solar PV and heatpump water heaters in the vast majority of net-zero…"
yesterday
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Residental Energy Specialist: Washington, DC (or possibly telework)

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