David Williams
  • Male
  • Belgrade, MT
  • United States
Share on Facebook Share on Facebook Share

David Williams's Friends

  • Marg properties

David Williams's Groups

 

David Williams's Page

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 Christopher 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
Thumbnail

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

David Williams's Photos

Loading…
  • Add Photos
  • View All

Comment Wall (1 comment)

You need to be a member of Home Energy Pros to add comments!

Join Home Energy Pros

At 6:20am 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

 
 
 

Featured Forum Discussions

What causes a temperature plane in a home

Started by Energy Wise Solutions in HVAC. Last reply by Peter Krych on Friday. 4 Replies

Velocity Pressure Testing

Started by Horace Douglas Hunt, Jr. in General Forum. Last reply by Horace Douglas Hunt, Jr. Apr 15. 2 Replies

Videos

  • Add Videos
  • View All

Latest Activity

Kurt Shafer added a discussion to the group Job Board
Thumbnail

Installers for Whole House Fans in Various Cities

Invisco Whole House Fan Company in Temecula CA sells the highest performance fans in history. The…See More
31 minutes ago
Kurt Shafer joined Diane Chojnowski's group
Thumbnail

Job Board

This group is for posting jobs related to all aspects of the home performance industry including…See More
37 minutes ago
Kurt Shafer posted a blog post

First Rooftop Whole House Fan for Homes without Attics

Eichler was one of the most famous Mid Century Modern home builders in the 50s and 60s. His homes…See More
38 minutes ago
Travis Lundberg replied to angela stanzione's discussion Used Weatherization and auditing equipment for sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Do you still happen to have a blower door fan, frame and fabric still for sale?  If so please…"
59 minutes ago
Profile IconTravis Lundberg and Alana Barnett joined allen p tanner's group
Thumbnail

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…See More
59 minutes ago
Profile IconTravis Lundberg, Ryan & Shannon Coon, Will johnson and 1 more joined Home Energy Pros
1 hour ago
Diane Chojnowski's event was featured
Thumbnail

Better Buildings Peer Exchange Call: Community-Based Social Marketing: Using Social Science and Data to Change Behavior at Eastern Time

June 29, 2017 from 1pm to 2:30pm
Thursday, June 29 1-2:30pm Eastern TimePlease join this peer exchange call to discuss how to use…See More
1 hour ago
Diane Chojnowski posted events
1 hour ago

Home Energy Pros

Welcome to Home Energy Pros – the unique digital community by and for those who work in the home energy performance arena.

Home Energy Pros was founded by the developers of Home Energy Saver Pro (supported 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. Please honor our Guidelines

© 2017   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service