David Williams
  • Male
  • Belgrade, MT
  • United States
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Latest Activity

David Williams replied to Rob Madden's discussion Energy Auditing Software
"I'm a long time user of HOT2000 from NRCAN. (since 1985) tops all others when modeling a building with passive solar characteristics."
Dec 1, 2016
David Williams replied to Tauran Ivall's discussion Energy Efficient Entry Door options out there?
"I'm a BIG fan of the entry porch.  Two well insulated doors and a place to kick off my muddy boots.  If it is on the South side, add some insulated windows and collect a little winter sun.  An idea taken from homes that were…"
Nov 12, 2015
David Williams replied to Rodney Fox's discussion Utility Meter Accuracy
"Ben,   I have a TED 1000 and a TED 5000 power monitoring station.  Made by The Energy Detective, the have been in service for several years.  These will cost a few hundred dollars, but are simple to install and the 5000 will collect…"
Nov 12, 2015
David Williams commented on Bijou Lulla's blog post HOW DO YOU MONITOR AND TRACK BUILDING ENERGY USE
"Good data will provide good analysis.  Monthly energy bills and weather data from a local airport will only get you in the same town as the ball park.  Actual delta T's and hourly fuel consumption will get you to home plate. The…"
Jul 23, 2015
David Williams commented on Bijou Lulla's blog post HOW DO YOU MONITOR AND TRACK BUILDING ENERGY USE
"Semi automatic-  I collect hourly energy use data using a TED 5000 for electric use and Lascar EL-USB-5 event data logger that is connected to the pulse output of an Elster BK-4G diaphragm meter for LPG usage.  Environmental data is…"
Jul 23, 2015
David Williams commented on Chris Morin's blog post Can you trust your Load Calc Software?
"A four year (hourly) monitoring and verification project has proven the need for passive solar gain calculations in heat dominant climates.  We have found up to 45% discrepancy between yearly energy use measured vs. modeled.  Wile the heat…"
Mar 17, 2014
David Williams replied to Bob Blanchette's discussion Gas meter "constant" charge.
"Bob, is there a mechanism that compares the amount of gas that enters that pipeline circuit and compares it with the amount that is metered and billed.  Accounting for losses in the delivery infrastructure must be included in the rates, but I…"
Dec 18, 2013
David Williams commented on Home Energy Magazine's blog post December 9, 2013...Will It Go Down In Weatherization History As The Day That Changed The Future?
"  Tedkidd might be on to something with program accountability.  I recently spent time in the crawl space, of a building that is owned by the government agency that administers the WAP program in my area.  I informed the director that…"
Dec 18, 2013
David Williams commented on Home Energy Magazine's blog post December 9, 2013...Will It Go Down In Weatherization History As The Day That Changed The Future?
"Meg has my attention and I share her philosophy on VERIFICATION.  The DOE has become a government beast with many heads and tails. Neither looking in the same direction nor wagging at the same accomplishments.  Standardized testing, with…"
Dec 18, 2013
David Williams replied to Kevin's discussion Underground ductwork
"What about Mold??? "
Sep 19, 2013
David Williams replied to Bud Poll's discussion HDD and internal gain.
"I am curious as to which energy modeling tools have been providing accurate results for the experts in this community?  Has anyone reviewed results from Greenbuild Studio (autodesk Revits' cloud based analysis using eplus as its'…"
Jul 22, 2013
David Williams replied to Bud Poll's discussion HDD and internal gain.
"Bud,   I have been collecting hourly energy use and environmental data for two homes for nearly four years.  One is superinsulated with minimal solar and internal gains (seasonal home)  and the other is a passive solar primary…"
Jul 19, 2013
David Williams commented on Bijou Lulla's blog post Solar Energy + Energy Efficiency – time to sing the Duet?
"Do not forget to consider Passive Solar Design for heating and day lighting solutions.  We can offset 30 to 50% of the annual heating needs (depending on location) with common sense design.  A proper design will also temper the summer…"
Apr 18, 2013
David Williams commented on Robert Riversong's photo
Thumbnail

Thompson SFP House Detail

"Extruded (of course).  I also like the way that you achieve the R15 edge requirement.  I have modeled energy loss comparing 2" XPS with 1" XPS in well drained + soils climate zone 6. and have reservations about the added cost of…"
Sep 6, 2012
David Williams commented on Robert Riversong's photo
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Thompson SFP House Detail

"Do you have a moisture barrier below the slabs' EPS?  I have found that a 1" layer of sand, placed over the EPS helped to protect both the insulation and vapor barrier.  This may have also provided some amount of moisture control…"
Sep 6, 2012
David Williams commented on James White's group Building Simulations
"Can you describe your data acquisition method and sensor type/location. I just completed 24 months of hourly monitoring on a passive solar residential building and have a Very large excel file of data that has been evaluated in many different…"
Sep 4, 2012

Profile Information

Company
Homestead Alternatives
Professional Certification
BS AAS Solar Engineering Technology, Mechanical Engineering Technology
Professional Interests
Passive Solar Design, Energy Modeling, Building Efficiency Evaluation, Common Sense Construction and Design.
Website URL
http://homesteadalternatives.com

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Comment Wall (1 comment)

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At 9:20am on April 19, 2012, Diane Chojnowski said…

Hi David,

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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Started by Cameron Home Insulation in General Forum 13 hours ago. 0 Replies

Greetings :)

Started by Dennis in General Forum. Last reply by Diane Chojnowski yesterday. 2 Replies

Electro Magnetic Fields (EMF)

Started by Barry L NewDelman in General Forum. Last reply by Brad Cook yesterday. 12 Replies

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David Butler replied to Alan Lehman's discussion Zehnder Comfopipe vs. rigid pipe
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Alan Van Zuuk replied to Alan Lehman's discussion Zehnder Comfopipe vs. rigid pipe
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Brennan Less replied to Alan Lehman's discussion Zehnder Comfopipe vs. rigid pipe
"Also, if it's exceptionally cold outside, you could have a supply air temp into the living…"
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Brennan Less replied to Alan Lehman's discussion Zehnder Comfopipe vs. rigid pipe
"Good questions. I would say that on the "house" side, which is connected to the inlets…"
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Taylor Joseph Mckay replied to Taylor Joseph Mckay's discussion Seeking to Purchase Blower Door in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"please shoot me an email taylor.joseph.mckay@gmail.com"
22 hours ago
Diane Chojnowski replied to Dennis's discussion Greetings :)
"Welcome Dennis! Great to have you join us! "
yesterday
Brad Cook replied to Barry L NewDelman's discussion Electro Magnetic Fields (EMF)
"Whoa! EMFs are everywhere, but they are not all equal. The characteristics of EMFs varies very much…"
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Ben Thompson replied to Taylor Joseph Mckay's discussion Seeking to Purchase Blower Door in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Hi Taylor.  I have a Minneapolis Blower Door set up for sale. DG-700 manometer was factory…"
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Arn McIntyre replied to Taylor Joseph Mckay's discussion Seeking to Purchase Blower Door in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Taylor I have item described below for sale.  Pictures are posted in Equipment for…"
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Taylor Joseph Mckay added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
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Sandra James replied to Barry L NewDelman's discussion Electro Magnetic Fields (EMF)
"I am quite interested in how EMF can cause health issues.  There is no question that too much…"
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Sandra James replied to Dennis's discussion Greetings :)
"Hello There, I am new as well. Hoping to learn new things through the course of this time on this…"
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