David Butler
  • Male
  • Huachuca City, AZ
  • United States
Share on Facebook Share

David Butler's Discussions

Beginners Guide: Managing Subscriptions on Home Energy Pros

Started this discussion. Last reply by Diane Chojnowski Nov 21. 2 Replies

New members may find subscriptions a bit confusing at first. I know I did. As you'd expect, when you create a new discussion or post a comment, you're automatically subscribed to comment…Continue

Welcome Home Performance Forum Members! (formerly RESNET BPI - Energy Audit and Home Performance)

Started Nov 18 0 Replies

Last month the Home Performance Forum merged with Home Energy Pros, now under the Home Performance Coalition banner. Members of the Home Performance Forum who are not already Home Energy Pro members…Continue

How would you insulate this roof?

Started this discussion. Last reply by Dave Taylor Nov 11. 61 Replies

I have a client who needs your help. In the early 80's, he and his wife built a beautiful off-grid home on a small island near Fort Myers, FL. It currently serves as a convenient getaway, but as they…Continue

 

David Butler's Page

Latest Activity

David Butler replied to Dav Camras's discussion Experience with new energy monitoring tools such as Curb, Sense, Nerio and Smapee
"Steve, my understanding from having followed NILM research in years past is that the monitoring system would need to have a manual mode whereby you could turn on a specific appliance (plug load or otherwise) and identify it to the system. Presumably…"
yesterday
David Butler commented on Blake Reid's blog post Heating Houses in Hawaii (pt. 1)
"I haven't used Treat but if it has a Design Heating and Cooling load report, I'm sure it's based on the design temperatures. And since it has the TMY3 hourly climate files, it can easily calculate the design temperature for any TMY3…"
yesterday
David Butler replied to Dav Camras's discussion Experience with new energy monitoring tools such as Curb, Sense, Nerio and Smapee
"re: Scott's comment about The Energy Detective monitoring individual appliances... TED uses a very crude method to recognize specific appliances, all done in software based on changing in power. As Scott said, it's terrible (I would have…"
yesterday
David Butler commented on Blake Reid's blog post Heating Houses in Hawaii (pt. 1)
"What software are you using? Proper heat load calculations are based on the local Design Temperature, not HDD as degree days tell us nothing about how much capacity is needed to heat or cool a home. Degree days can be used to roughly estimate…"
yesterday
David Butler replied to Dav Camras's discussion Low Leakage home with cathedral ceiling
"With a vented cathedral ceiling, getting a tight envelope is difficult, but not impossible. Various products are available to maintain the vent gap, some of which are easier than others to air seal. It's easier, and I believe better, to go with…"
Friday
David Butler replied to Melissa Baldridge's discussion ASHRAE 62.2 Help
"Melissa, there's a lot wrapped up in your question. Is Energy Trust of Oregon somehow involved in your project? The reason I ask is because the table you posted would only be valid for the specific version of 62.2 that it was designed for…"
Nov 30
David Butler replied to Brendan Reid's discussion Speed Tips For Duct Airtightness Testing?
"The Home Performance archives site (re: HP Forum Archives tab on main menu) has a two-tier search engine. There's a quick search box at the top of the archive forum frame. There's also an Advanced Search page (linked just below quick…"
Nov 25
Diane Chojnowski replied to David Butler's discussion Beginners Guide: Managing Subscriptions on Home Energy Pros
"Great guide David! Thanks! We send two weekly emails to keep members in the loop about new blogs, discussions, and other content. If you're not getting the weekly emails, check your email settings to subscribe. Check your current settings by…"
Nov 21
David Butler replied to Don Fugler's discussion joining ducts in the group HVAC
"I never checked that before. Checking now... Section M1502.4.2 of the International Residential Code prohibits screws or other fasteners that protrude more the 1/8" into a clothes dryer duct. M1502 also requires manufacturer instructions to be…"
Nov 19
David Butler posted discussions
Nov 19
David Butler replied to Don Fugler's discussion joining ducts in the group HVAC
"Static pressure drop through a straight length of pipe is a function of friction rate, and friction is largely a function of surface smoothness. Like metal ducts, PVC pipes have a relatively smooth surface. Here's a friction loss calculator…"
Nov 18
David Butler replied to Don Fugler's discussion joining ducts in the group HVAC
"Why would you think PVC has high resistance?"
Nov 18
David Butler replied to Don Fugler's discussion joining ducts in the group HVAC
"Great post, Sean. I agree that screws are wise when joining metal ducts, but its also true that screws can be problematic in dryer exhaust ducts. For this reason, I used thin-walled drain & sewer PVC for my dryer exhaust in my previous home,…"
Nov 18
David Butler joined Chris Laumer-Giddens's group
Thumbnail

Energy Efficient Design

Energy efficiency starts at the drafting table...How architects and designers can help buildings reach high-performance standards.See More
Nov 18
David Butler joined James White's group
Thumbnail

Building Simulations

Work collaboratively to find easier, more accurate and better ways to model, predict and verify a home's energy consumption.
Nov 18
David Butler joined Mark Richardson's group
Thumbnail

Renewable Energy

This group will focus on the issues associated with incorporating renewable energy sources like Solar PV, Solar Thermal, Geothermal, Small Wind, Small Hydro into the Residential Energy Efficiency and Sustainability business model.
Nov 18

Profile Information

Company
Optimal Building Systems
Role in Home Performance Marketplace
Building energy modeler, Researcher (Lab. academia. etc.), Other
Professional Certification
Other
Website URL
http://optimalbuilding.com
LinkedIn Profile
https://www.linkedin.com/in/davidbutler52/

Comment Wall (1 comment)

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

Join Home Energy Pros Forum

At 9:43am on November 1, 2011, 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 add your location on our Member Map!


Thanks!
Diane, HEP Moderator

 
 
 

Forum Discussions

Latest Activity

Energy Home Pros posted a blog post

What Kind Of Hacks Help Saving Money And Energy For Your Homes?

There are so many insulation contractors out there who state that they can only help their…See More
3 hours ago
Bryan Gabriel liked Bob Krell's discussion What Do You Do When You Find Suspected Mold?
10 hours ago
Home Energy Magazine posted a blog post

Degree Days Shuffle

A 2015 study, “Impacts of global warming…See More
11 hours ago
Efficiency First California posted blog posts
12 hours ago
Steve Schmidt replied to Dav Camras's discussion Experience with new energy monitoring tools such as Curb, Sense, Nerio and Smapee
"@David: No, it does not have this feature. Apparently machine learning doesn't work that way."
13 hours ago
Dana Fischer replied to Dav Camras's discussion Experience with new energy monitoring tools such as Curb, Sense, Nerio and Smapee
"Thanks to Laura Martel for prompting me to submit feedback. ;) Similar to Dan Phillips, I installed…"
13 hours ago
Blake Reid commented on Blake Reid's blog post Heating Houses in Hawaii (pt. 1)
"Yes, all of that.  The next part (stay tuned for part 2) will be about my hunt for a decent…"
15 hours ago
John Krochmalny's blog post was featured

Tell me again: Exactly where do I place that vapor barrier again?

There may be much confusion as to where vapor barriers are placed in building systems. Some people…See More
18 hours ago

Photos

  • Add Photos
  • View All

© 2017   Created by Home Performance Coalition (HPC)   Powered by

Badges  |  Report an Issue  |  Terms of Service