Matthew Dahlhausen
  • State College, PA
  • United States
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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

 
 
 

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Luis Imery added a discussion to the group Job Board
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Hiring: Construction Manager with High Performance Custom Home Experience

POSITION DESCRIPTIONJob Title: Construction ManagerDepartment: Construction –…See More
9 hours ago
Profile IconLuis Imery and Quinn Korzeniecki joined Diane Chojnowski's group
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Job Board

This group is for posting jobs related to all aspects of the home performance industry including…See More
9 hours ago
Colin Genge posted an event

Retrotec is attending the NEBB Testing and Balancing (Tab) Certified Professional Review Seminar in Chicago, IL at Hilton Chicago O’Hare Airport

June 6, 2016 at 8am to June 8, 2016 at 5pm
Building owners and tenants are concerned that the environmental performance of buildings must be…See More
13 hours ago
Colin Genge updated an event
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Retrotec is exhibiting at the NFPA Conference & Expo-Booth 1355 at Mandalay Bay Convention Center

June 13, 2016 at 8am to June 16, 2016 at 5pm
NFPA's Conference & Expo is widely regarded as the most comprehensive industry event for…See More
13 hours ago
Tom White posted a video

Hayward Healthy Home Principles and Products

Bill Hayward discusses the principles that were used to build the first Hayward Healthy Home and how the products were evaluated for toxicity before they wer...
14 hours ago
Tom White's video was featured

Building Science Insights -- To Vent or Not to Vent

Building Science Presentation with Dr. Joseph Lstiburek.
15 hours ago
Quinn Korzeniecki added a discussion to the group Job Board
15 hours ago
Profile IconIan Smith, Brett Slezak, Autumn Secrest and 6 more joined Home Energy Pros
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