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, 2014
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, 2014
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!


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.  Home Energy Pros is sponsored by the Better Buildings Residential Network.

Latest Activity

John Kaye posted a blog post

FREE Home Efficiency & Safety Assessments in the Los Angeles County area.

Since last June I have been qualifying homeowners in the Los Angeles County for the Home Upgrade…See More
54 minutes ago
Eric Kjelshus replied to Rod Fox's discussion Does calcification affect electric water heater aquastat temperature sensor performance?
"Those 240 Volt aquastats shut off and then on kinda quick back on.  The older the tank the…"
5 hours ago
Profile IconMike Norvell Sr and Jen Loomis joined Home Energy Pros
10 hours ago
Rod Fox replied to Rod Fox's discussion Does calcification affect electric water heater aquastat temperature sensor performance?
"Well I'd love to tell you folks I found an answer, but I did not... I went to my…"
14 hours ago
Rod Fox replied to Kevin Eigel's discussion What is the best energy auditing software?
"I've been trying to answer this question for many years and have not yet found an answer.…"
14 hours ago
Jerry Lawrence posted events
14 hours ago
Jan Green commented on Theresa L Gilbride's blog post Find out who's building some of the best-performing homes in the country today with DOE’s Tour of Zero
"Thank you for sharing! "
16 hours ago
Jan Green commented on Theresa L Gilbride's blog post Find out who's building some of the best-performing homes in the country today with DOE’s Tour of Zero
"We have one builder in Arizona on the DOE list.  Good information for a blog!"
16 hours ago

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