Jon Haehnel
  • Male
  • Fairlee, VT
  • United States
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Latest Activity

Jon Haehnel replied to Luis Hernandez's discussion Calculating BTU lost per cfm leaks
"Bud, You explained it just fine.  Makes sense. "
Jan 27, 2014
Jon Haehnel replied to Luis Hernandez's discussion Calculating BTU lost per cfm leaks
"Bob, Where does the value 1.08 come from?  I am more familiar with the  "0.018 BTUs per cubic foot to raise its temperature 1° F" that Bud cited.  Using a hypothetical 125 CFM nat. with a delta T of 50…"
Jan 27, 2014
Jon Haehnel replied to HB's discussion A new home energy calculator, please share your thoughts
"It seems easy to use but I didn't see the option to change HVAC systems.  Also, how do you run energy improvement scenarios in it? "
Dec 13, 2013
Jon Haehnel replied to Jose Macho's discussion Why Are Energy-Saving Home Inprovements Down??
"The first 2 answers by Tom and Sean jive with my thinking and experience. Thank you Don for expressing the idea that govt has to get out of both subsidizing energy costs and rebating energy improvements. In New England where I work I feel like I am…"
May 23, 2013
Jon Haehnel commented on Macie Melendez's blog post The Future of Home Performance is Wrapped in Cheese—Q&A with Dave Robinson
"Dave is right on the mark.  I hope the state efficiency programs take notice, they could help this kind of work if they would make changes in their policies. Without a natural driver for change, like high energy prices, we will  have to…"
Apr 29, 2013
Jon Haehnel commented on Glen Gallo's blog post Building Science is not really science
"Glen and Tom are right.  To imply that because we have some training and/or experience under our belts and because we test we know exactly what to do in every building it naive.  I always cringe at the…"
Nov 8, 2012
Jon Haehnel added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase

Minneapolis Blower Door for sale

Minneapolis Blower Door system in excellent condition, well maintained, and used only a few times. It includes a BD-3 series fan, a DG700 meter with Cruise Micromanometer, an adjustable frame with a single hole shroud.   Includes all the necessary cords and hoses. I'd rather sell it to someone in New England so we can avoid shipping but I'm flexible if you're interested. $2200. Call 802-522-9713.   See More
Aug 25, 2012
Jon Haehnel joined allen p tanner's group

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment you have to sell, trade or wish to purchase.Please post the equipment age, serial numbers, condition, warranties and asking price.See More
Aug 25, 2012
Jon Haehnel replied to randy tolowski's discussion New Certifications from BPI in the group Building Performance Institute (BPI)
"Leslie,   There is still some confusion.  Should an experienced auditor ditch envelope, analyst, and heating certifications for the new auditor certification when it is time to recertify? Or should she just ditch analyst,…"
Apr 23, 2012
Jon Haehnel replied to Ronald L. Stevens's discussion How to help new energy pros migrate into our new career as fresh students right out of class
"Ronald, I regularly teach students like you and I advise them to get a job in the industry as quickly as they can so they can gain experience AND learn about the industry.  As long as it pays the bills don't fret too much about…"
Mar 29, 2012
Jon Haehnel replied to randy tolowski's discussion New Certifications from BPI in the group Building Performance Institute (BPI)
"I encourage all of us auditors to weigh in on this forum and send your thoughts to BPI.  I for one am going to rewrite this post in a letter to CEO Larry Zarker and to each member the BPI Board of Directors.     Leslie, I am…"
Mar 15, 2012
Jon Haehnel joined Leslie McDowell, BPI's group

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
Mar 15, 2012
Jon Haehnel replied to Thomas Price's discussion Multi Family Auditing
"Phil,   Not to belabor the point but what did you mean by "give them powerful tools".  I thought I had you pegged as opposed to the "tools" i.e. computer models, IR cameras, blower doors and the…"
Feb 10, 2012
Jon Haehnel replied to Thomas Price's discussion Multi Family Auditing
"Phil, You assume too much.  You assume that I work for a program that funds my audits, I don't.  Most of my audits are paid for by the owner, the full amount.  I don't guarantee savings.  Do you? …"
Feb 10, 2012
Jon Haehnel replied to Thomas Price's discussion Multi Family Auditing
"Thomas Price, I’d like to pick up your doctor analogy; I think there is much in common between us and doctors (except pay).  I don’t believe that doctors typically prescribe more tests just to make more money. They know that every…"
Feb 10, 2012
Jon Haehnel replied to Classic Residential, Inc.'s discussion Learning Thermostat
"How about it auditors?  Does anyone have any data  showing changes in electical consumption from one year to the next by using a  thermostat setback with electric heat?   It would be helpful in this conversation and…"
Dec 6, 2011

Profile Information

Zero by Degrees LLC
Professional Certification
BPI - Analyst and Envelope Professional
Professional Interests
Actual energy savings vs. predicted, air tightness measurement and savings predictions, energy modeling
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At 12:10pm on July 25, 2011, Diane Chojnowski said…

Hi Jon,

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!

Diane, HEP Moderator


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John Gillis replied to John Gillis's discussion Energy Savings of Whole House Fans vs. Air Conditioners in SoCal Featured on New 'Ask This Old House' Season in the group News & Announcements
"Hi Eric. Thanks for the response. If you wouldn't mind calling/e-mailing Nelson Warner or…"
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