Roy Sakamoto
  • Clovis, CA
  • United States
Share on Facebook Share on Facebook Share
  • Featured Blogs
  • Discussions (3)
  • Events
  • Groups
  • Photos
  • Photo Albums
  • Videos

Roy Sakamoto's Discussions

Whole house air leakage
14 Replies

I have reviewed, tested, studied, asked, and analyzed the many facets of whole house air leakage.  I am still somewhat unsure what constitutes a respectable level of air leakage to a home.  Newer…Continue

Started this discussion. Last reply by Ed Minch Apr 1, 2014.

 

Roy Sakamoto's Page

Latest Activity

Ed Minch replied to Roy Sakamoto's discussion Whole house air leakage
"This is definitely worth investigating if you are an air sealer and are forced to use the ACH50 metric. First look at a 1500 ft2 ranch on a slab at 50'X30' with an 8' ceiling.  It has a volume of 12,000 ft3, and a surface area,…"
Apr 1, 2014
Cameron Millard replied to Roy Sakamoto's discussion Whole house air leakage
"Air sealing can also provide an opportunity to reduce contamination from dirty attics and crawlspaces though, but you are right that ventilation is key which is why I think crawlspace fans are a good idea. "
Apr 1, 2014
Cameron Millard replied to Roy Sakamoto's discussion Whole house air leakage
"This jives with my experience trying to air seal a very small house - lots of caulk and foam and not much of a result (only a few hundred CFM after several hours of work).  Bigger homes seem easier to reduce in my experience."
Apr 1, 2014
Ed Minch replied to Roy Sakamoto's discussion Whole house air leakage
"Dob Do the math on that one - any volume based measure favors big houses because the volume is not what is leaking - the surface area is.  A small house has more surface area per ft3 than a big house, so gets penalized.  I have measured…"
Mar 27, 2014
David Eakin replied to Roy Sakamoto's discussion Whole house air leakage
"Don, I'm not sure I follow. Is it because the 2012 IECC does not include the basement area as conditioned space, or that slab houses are viewed as being "leakier" than houses with double the flooring footprint and having a basement,…"
Mar 27, 2014
Ed Minch replied to Roy Sakamoto's discussion Whole house air leakage
"Don H- +1 to everything you said.  Something to add is that it depends entirely on the metric you use. If you use ACH50 which is becoming the norm where the 2012 IECC is used, you must seal every square foot of envelope on a 1200 ft2 house on a…"
Mar 27, 2014
David Eakin replied to Roy Sakamoto's discussion Whole house air leakage
"I have been thinking quite a bit about this topic recently, and the more I think about it the less convinced we are on the right track. First - blower door tests DO NOT give an indication of air infiltration; they give a slight indication of the…"
Mar 27, 2014
Richard Beyer replied to Roy Sakamoto's discussion Whole house air leakage
"Old homes are not great candidates for ASHRAE standards. It can be achieved with risk. Unless the energy rater understands all the hidden problems associated with the old home in question, air sealing can present some long term health issues with…"
Mar 26, 2014
Barbara Smith replied to Roy Sakamoto's discussion Whole house air leakage
"This report has some numbers from the Wisconsin Weatherization Program. http://homeenergyplus.wi.gov/docview.asp?docid=24319&locid=25 For example, Figure 7. shows the blower door readings before and after weatherization,…"
Mar 25, 2014
Don Hynek replied to Roy Sakamoto's discussion Whole house air leakage
"This doesn't have to be that complicated…. If your goal is to save energy, the answer is always "get it as tight as possible" If your goal is to save energy and assure indoor air quality, the answer is "build tight and…"
Mar 24, 2014
Roy Sakamoto replied to Roy Sakamoto's discussion Whole house air leakage
"Thank you for your reply.  You have some good points to watch out for."
Mar 24, 2014
Cameron Millard replied to Roy Sakamoto's discussion Whole house air leakage
"Roy, I have not tested for humidity post-retrofit, but that isn't a bad idea. I do know the crawlspace fan works to dry out the crawlspace; we had a client with a flooded basement and installed a vent fan which dried it right up in a few…"
Mar 24, 2014
Roy Sakamoto replied to Roy Sakamoto's discussion Whole house air leakage
"Thank you for your input.  I am curious if after you complete sealing the rim joists or other areas whether you performed any moisture tests after the sealing to determine the moisture content.  Our area does not normally have moisture…"
Mar 23, 2014
Cameron Millard replied to Roy Sakamoto's discussion Whole house air leakage
"I've tackled quite a few air sealing projects on homes built in the 1800's in the Colorado Rockies.  They can be quite a challenge to air seal, even at the 10% required by our utility for rebate funds.  If the crawlspace is…"
Mar 20, 2014
Roy Sakamoto posted a discussion

Whole house air leakage

I have reviewed, tested, studied, asked, and analyzed the many facets of whole house air leakage.  I am still somewhat unsure what constitutes a respectable level of air leakage to a home.  Newer homes built to higher standards are not a problem but when you get into older homes with varying degrees of air leakage depending on when they were built and by whom presents some interesting situations.  The recommended rates of leakage on older homes do not present the same situation as new homes as…See More
Mar 14, 2014
Roy Sakamoto is now a member of Home Energy Pros
Apr 23, 2012

Profile Information

Company
Action Air Conditioning, Heating and Plumbing
Professional Certification
C-20, C-36, NATE, BPI
Professional Interests
Whole house analyst, Energy remodeler, energy auditor, energy analyst

Comment Wall (1 comment)

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

Join Home Energy Pros

At 3:01pm on April 23, 2012, Diane Chojnowski said…

Hi Roy,

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,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Paul Haasz joined Evan Mills's group
Thumbnail

Home Energy Ratings

Calculating them; visualizing them; explaining them; selling them .... there is a lot to discuss…See More
11 hours ago
Paul Haasz joined James Sayers's group
Thumbnail

Marketing Energy Efficiency

Sharing ideas, tools and examples of promoting energy efficiency to consumersSee More
11 hours ago
Paul Haasz 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
11 hours ago
Paul Haasz joined Leslie McDowell, BPI's group
Thumbnail

Building Performance Institute (BPI)

BPI is the nation's premier standards development, quality assurance and credentialing organization…See More
11 hours ago
Paul Haasz joined Sean Lintow Sr's group
Thumbnail

Best Practices (Residential)

Best Building, Retrofitting, or even Auditing Practices - what are they, what should change, what…See More
11 hours ago
Profile IconPerry Hurtt, charles michael durishin, Robert Lewis and 7 more joined Home Energy Pros
12 hours ago
Joe Konopacki posted an event

Duct & Envelope Tightness (DET) Verifier at Temperature Equipment Corporation

May 8, 2015 from 8:30am to 4:30pm
The Duct & Envelope Tightness Certification (DET) was designed by the Illinois Association of…See More
19 hours ago
Paul Raymer posted a blog post

Shades of Gray in Residential Construction Morality

I was called in to perform a last minute duct test for a modular home builder.  He was all in a…See More
21 hours ago

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service