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 Building Performance Institute'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

 
 
 

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Michael Dunseith commented on Kirsten Richnavsky's group Retrotec, Inc
"Congratulations on your new postion. Looking forward to working with you in the near future. Best…"
15 hours ago
Michael Dunseith joined Kirsten Richnavsky's group
16 hours ago
Wayne Melancon replied to Wayne Melancon's discussion What's the Most Profitable HVAC Job for Your Company?
"I'll agree with you there Ken. We'll get shopped by residential when the customer already…"
21 hours ago
Horace Douglas Hunt, Jr. commented on Horace Douglas Hunt, Jr.'s photo
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"and....this was the best looking spot in the air handler. Seal the unit if you want to have any…"
23 hours ago
Horace Douglas Hunt, Jr. commented on Horace Douglas Hunt, Jr.'s photo
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"Beginnings of mold....due in some part to leaks in air handler pulling hot humid air from…"
23 hours ago
Horace Douglas Hunt, Jr. posted photos
23 hours ago
Eric Kjelshus replied to Wayne Melancon's discussion What's the Most Profitable HVAC Job for Your Company?
"What is your "Key Performance Indicator" dollar per hour? gross dollar per man day? % of…"
yesterday
Jan E. Graveamker replied to Mary Sinkler's discussion Lighting replacement - 300 watt LED flood light
"Hi Mary, What is the purpose of lighting the backyard ?  Sense of safety, night time…"
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