Jim Baerg
  • Livingston, MT
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Jim Baerg's Discussions

LBL map for determining "n" values

Started this discussion. Last reply by Max Sherman Jun 8, 2012. 3 Replies

I am curious about the zone map developed by LBL that is used for calculating Building Tightness Limits (BTL)  The map is ubiquitous, but pretty crude.  It certainly doesn't correspond to avg wind…Continue

 

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Latest Activity

Jim Baerg replied to Ethan Bodnaruk's discussion Insulating with *Updated* (an oxymoron, right!) knob and tube wiring
"I did a Web search on this recently; NEC prohibits covering K&T with insulation.  Must maintain a 3" air gap.  Some states, under the auspices of Bonneville Power, have amended that rule;  Calif, OR, WA, ID and also Nebraska.…"
Mar 6, 2014
Jim Baerg replied to Tom DelConte's discussion Energy Myths- Fact or Fiction?
"Good list.  I'd like to comment on Myth #1 about registers.  Closing registers (and bedroom doors) will change room-to-room pressures and will also reduce airflow across the heat exchanger of the furnace.…"
Apr 15, 2013
Jim Baerg replied to Jonathan Bluey's discussion HELP - AIR SEALING a Continuous Stone Interior/ Exterior Wall
"I've drilled wood window and door jambs on double wythe brick walls and then dense packed.  Helped a lot.  Dunno if that applies to your job."
Apr 12, 2013
Jim Baerg commented on Lenka Rihova's blog post PassivHaus – Is it the Future of Home Building?
"If you compare the energy codes of the late 1970s to the 2012 IECC you get this for Zone 6:  Ceilings, R-19 to R-49, Walls, R-11 to R-25, Basements, R-0 to R-19, Windows, U-.5 to U.32, Air leakage, no requirement to 3ACH, Lighting, no…"
Feb 27, 2013
Jim Baerg commented on Lenka Rihova's blog post PassivHaus – Is it the Future of Home Building?
"The IBC is upgraded every 3 years nationally, as is the IECC (International Energy Conservation Code). Each state has the option of adopting these new codes.  Currently, most states are using the 2006 or 2009 IECC.  The 2012 code has been…"
Feb 26, 2013
Jim Baerg commented on Lenka Rihova's blog post PassivHaus – Is it the Future of Home Building?
"Seems like a little German bashing going on.  Passiv Haus, of course, has been very influential.  Here's hopes for the Code, especially if it addresses demand loads to a similar extent."
Feb 25, 2013
Jim Baerg replied to James White's discussion Russian Wood Stoves (Masonry Stoves)
"James,  here's what I meant about masonry stoves or radiant floors in poorly insulated homes and it is based on experience with radiant floors. Both heating sytems provide radiant heat which is physically welcome when a person is cold and…"
Dec 21, 2012
Jim Baerg replied to James White's discussion Russian Wood Stoves (Masonry Stoves)
"Don't forget that masonry stoves work best (just like radiant floors) in poorly insulated houses when  you need a radiant surface to feel warm.  If you've gotten your home up to a reasonably high insulation level, then it is hard…"
Dec 3, 2012
Jim Baerg replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"How about this idea that I saw used on mid-floor balloon framed floors;  in the basement ceiling, drill a 2-1/2 to 3" hole in each bay adjacent to the foundation, insert a poly bag into the hole leaving the open end of bag down…"
Nov 1, 2012
Max Sherman replied to Jim Baerg's discussion LBL map for determining "n" values
" To the technical question asked, the map does include wind speed, but stack effect--i.e. indoor-outdoor temperature differences--is the bigger driver.  The zones follow a combinations of wind and temperature. I am the father (or at least…"
Jun 8, 2012
Evan Mills replied to Jim Baerg's discussion LBL map for determining "n" values
"I've forwarded to Max Sherman and Iain Walker.  They may get back to us."
Jun 8, 2012
Bud Poll replied to Jim Baerg's discussion LBL map for detirmining "n" values
"Jim, I'm chuckling as I remember reading an article years ago about the development of the LBL number. I have looked since and not been able to find that article so I cannot reference it. If anyone knows its whereabouts I would appreciate a…"
Jun 7, 2012
Jim Baerg posted a discussion

LBL map for detirmining "n" values

I am curious about the zone map developed by LBL that is used for calculating Building Tightness Limits (BTL)  The map is ubiquitous, but pretty crude.  It certainly doesn't correspond to avg wind speeds where I live.  Are there any other factors incorporated in that map? Using the wrong zone can result in a 15-20% error in the BTLFor reference, I'm attaching some maps from MontanaThanks, JimSee More
Jun 7, 2012
Jim Baerg replied to Al Heath's discussion Energy Modeling Software - what works??
Feb 23, 2012
Jim Baerg is now a member of Home Energy Pros
Jun 22, 2011

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Company
Montana Energy+Design
Professional Certification
BPI QCI
Professional Interests
Building Performance
Sustainable Design
Weatherization technics
Building Science
Website URL
http://www.mte-d.com

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At 1:05pm on June 28, 2011, Diane Chojnowski said…

Hi Jim,

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!


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Diane, HEP Moderator

 
 
 

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