Matthew Dahlhausen
  • State College, PA
  • United States
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Latest Activity

Matthew Dahlhausen replied to Mike Rogers's discussion Where do you fall in the "staged" versus "gotta be all at once" discussion?
"The unit will cycle more, which will cause an efficiency drop.  The economic comparison is then the cost of the extra fuel use from cycling, versus the value of delaying the capital expenditure.  Generally the value of delaying is worth…"
Apr 4
Matthew Dahlhausen replied to Mike Rogers's discussion Where do you fall in the "staged" versus "gotta be all at once" discussion?
"It depends on the capital available, investment lifetime considered, and the state of the mechanical equipment.  The "tunnel through the cost barrier" savings comes from changing to a different mechanical system, e.g. steam boiler to…"
Apr 3
Matthew Dahlhausen replied to Mike Kandel's discussion Can you solve this month's stumper? in the group Building Performance Institute (BPI)
"The solution to this problem is to prevent warm moist air from contacting a condensing surface.  This is difficult, because it is nearly impossible to create a perfect air barrier – especially one that maintains a seal over time in a…"
Feb 28, 2013
Matthew Dahlhausen joined Leslie McDowell, BPI's group
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Building Performance Institute (BPI)

BPI is the nation's premier standards development, quality assurance and credentialing organization for residential energy efficiency retrofit work.See More
Feb 28, 2013
Diane Chojnowski left a comment for Matthew Dahlhausen
"Welcome to Home Energy Pros! Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos and upcoming events. If you're blogging about home performance, this is the place for you! Don't…"
Feb 27, 2013
Matthew Dahlhausen is now a member of Home Energy Pros
Feb 21, 2013

Profile Information

Company
Penn State University
Professional Certification
BPI
Professional Interests
Deep energy retrofits of residential and commercial buildings. Legitimate green buildings.
Website URL
http://www.buildsci.us/

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At 10:10am on February 27, 2013, Diane Chojnowski said…

Welcome to Home Energy Pros! Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos and upcoming events. If you're blogging about home performance, this is the place for you!

Don't forget to upload your profile photo. And add your location on our Member Map!


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Diane, HEP Moderator

 
 
 

Home Energy Pros

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Latest Activity

David Eakin replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"More food for thought on this subject - read this (fairly) recent blog by one of the most respected…"
4 hours ago
Curt Kinder commented on Christopher Morin's blog post 5 Things New Energy Efficiency HVAC Contractors Need to Know
"You left out air distribution...Without at least a passing glance at how much air moves through the…"
9 hours ago
David Eakin replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"I mis-spoke - I was referring to the Midori House in Santa Cruz. Have an in-depth discussion with…"
15 hours ago
Profile IconScot Davidson, j jarvella and Michael joined Home Energy Pros
22 hours ago
Kaushal Bharath Raju replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"Hi David & Bud, $400/sqf > $300 sqf. The latter is the minimum cost of new construction in…"
23 hours ago
David Eakin replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"Kaushal, There was a deep energy retrofit upgrade project (to Passive House standards) in San Jose…"
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Kim Tanner updated an event

Beyond Residential Testing at The Energy Conservatory

May 14, 2014 to May 16, 2014
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Casey Gesell posted a video

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http://www.drenergysaver.com | 1-888-225-6260 The new Super Attic: Advanced Conversion System -- converts your attic from a vented attic into an unvented at...
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Casey Gesell just added their location.
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H.O. Electric posted a video

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Air Source Heat pump or mini-split efficiency

Greetings everyone!    I have a technical questions I hope I could get some feedback! I understood…See More
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