Matthew Dahlhausen
  • State College, PA
  • United States
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Matthew Dahlhausen's Page

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/

Comment Wall (1 comment)

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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!


Thanks!
Diane, HEP Moderator

 
 
 

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.

Latest Activity

Hal Skinner replied to Hal Skinner's discussion How our ceramic based RCC works in the group Radiant Control Coatings
"Hey Tom, I will find the ORNL repoprt and post it.  It was a test on a ballasted roof sample.…"
7 hours ago
Tom Mallard replied to Hal Skinner's discussion How our ceramic based RCC works in the group Radiant Control Coatings
"So it seems that what you're saying is for heat-transfer the stuff has little resistance or…"
8 hours ago
Hal Skinner added a discussion to the group Radiant Control Coatings
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How our ceramic based RCC works

How our RCC worksEveryone knows, understands and accepts that RCCs reflect heat away from roofs,…See More
9 hours ago
Mike Kandel posted a discussion

Earn BPI CEUs at 3rd Annual Building Performance Forum

If you're searching for BPI CEUs, you'll find plenty at the 3rd Annual Building Performance Forum…See More
14 hours ago
Mike Kandel added a discussion to the group Building Performance Institute (BPI)
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Earn BPI CEUs at 3rd Annual Building Performance Forum

If you're searching for BPI CEUs, you'll find plenty at the 3rd Annual Building Performance Forum…See More
14 hours ago
Sean Lintow Sr commented on Christopher Morin's blog post UPDATED: Big Changes for Duct Testing in MA
"4% TOTAL Ted - Leakage to outside was stripped from the codes & for good reason"
17 hours ago
tedkidd commented on Christopher Morin's blog post UPDATED: Big Changes for Duct Testing in MA
"Wait!  4% total leakage or 4% leakage to outdoors? "
18 hours ago
Tom White's video was featured

Alliant Energy's PowerHouse TV: Sealing Leaky Ductwork

The PowerHouse television shows are written and produced by Alliant Energy, an energy services company based in Madison, Wis. The first PowerHouse episode was aired in September 1996 on KCRG-TV9 in Cedar Rapids, Iowa, and appears in six broadcast…
20 hours ago

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