"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…"
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David Williams
- Male
- Belgrade, MT
- United States
- Featured Blogs
- Discussions (6)
- Events
- Groups (2)
- Photos (15)
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- Videos
David Williams's Groups
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Building Simulations
63 members
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Best Practices (Resident…
253 members
David Williams's Page
Latest Activity
David Williams commented on Bijou Lulla's blog post Solar Energy + Energy Efficiency – time to sing the Duet?David Williams commented on Robert Riversong's photo
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…"
David Williams commented on Robert Riversong's photoThompson 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…"
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…"
David Williams posted a status"30 years of energy modeling and design using passive solar principles. Evaluating and confirming the end results is critical."
David Williams joined James White's group
Building Simulations
Work collaboratively to find easier, more accurate and better ways to model, predict and verify a home's energy consumption.
David Williams replied to Chris Laumer-Giddens's discussion Designing for High Performance: Slab-On-Grade, Part I – Controlling Moisture Flow in the group Best Practices (Residential)" I just left a job site where the builder is convinced that he followed the IECC 2009 heated slab on grade specifications for zone 6 (Montana). He passed local inspections so I am now second guessing myself. He has 2 inch EPS …"
David Williams replied to Chris Laumer-Giddens's discussion Designing for High Performance: Slab-On-Grade, Part III – Controlling Air Flow in the group Best Practices (Residential)"Does the insulated Zip R-panel allow water vapor to pass to the outside, for cold climate installation?"
David Williams replied to Chris Laumer-Giddens's discussion Designing for High Performance: Slab-On-Grade, Part III – Controlling Air Flow in the group Best Practices (Residential)"Have you properly addressed the below slab insulation requirements (based on the climate zone of this building site) according to IECC 2009??"
David Williams joined Sean Lintow Sr's group
Best Practices (Residential)
Best Building, Retrofitting, or even Auditing Practices - what are they, what should change, what needs to find it's way to the dust bin of history?See More
David Williams replied to Rod Fox's discussion Utility Meter Accuracy"Does the home have its' own well?? This can often be wired to the main service entrance which might place it in front of your metering equipment. Well pumps and automated lawn irrigation can require a significant load increase an could…"
David Williams commented on Christopher Morin's blog post Site Survey: Windows & SHGC"We're in the same ballpark but we might be on different teams. More likely due to location than ideology. I also rely on thermal load calculations and am particularly vested in solar impacts in a heat dominant climate. I have …"
David Williams replied to Zachary Popkin's discussion Home Energy Score Launch" The MPG analogy has been a concern for those of us that design and build Passive Solar homes. A blower door test and a check list just didn't present the real energy consumption of these types of homes and most modeling programs…"
David Williams replied to Paul Bowman's discussion Honest Buildings"I believe that consumer access to smart metering data (gas, electric, etc.), combined with environmental monitoring, can give consumers the same desire to embrace energy efficiency that speedometers and fuel gauges have given them in their…"
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
Comment Wall (1 comment)
- 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
Home Energy Pros
Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy, under the American Recovery and Reinvestment Act) and brought to you in partnership with Home Energy magazine.
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Matthew Redmond posted a status"Full house for NYSWDA's ASHRAE 62.2 course today. A lot of discussion on implementing this standard on NY State's diverse housing stock."
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One thing I don't want to see is more…"
tedkidd commented on Tom Delconte's blog post Robert Shiller Says Retrofits Are Never Worth It!"Bob B.
Buying a home is a good investment because it is forced savings more than a good…"
Joe Huang posted a discussionWhite Box Technologies launches Web-based weather data for building energy simulations
White Box Technologies is pleased to announce under agreement with ASHRAE the launch of WBT Weather…See More
Joseph Lamy commented on Jim Gunshinan's blog post The Universe Is Made of Stories"My life changed when I got 'ductalatored' - became familiar with proper sizing guides for…"
Judi Lyall 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…See More
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