Featured Research

from universities, journals, and other organizations

Simulations Predict Savings From More Airtight Buildings

Date:
October 10, 2005
Source:
National Institute of Standards and Technology
Summary:
U.S. commercial building owners could save substantially on annual heating and cooling energy costs by improving airtightness of their buildings' envelope, according to a recent National Institute of Standards and Technology (NIST) study. The research used simulation software to evaluate the energy impact of improved air barriers in three typical non-residential buildings in five cities, each in a different climate zone. The results predicted potential annual heating and cooling energy cost savings as high as 37 percent.

U.S. commercial building owners could save substantially on annualheating and cooling energy costs by improving airtightness of theirbuildings' envelope, according to a recent National Institute ofStandards and Technology (NIST) study. The research used simulationsoftware to evaluate the energy impact of improved air barriers inthree typical non-residential buildings in five cities, each in adifferent climate zone. The results predicted potential annual heatingand cooling energy cost savings as high as 37 percent.

Related Articles


With baseline energy, climate and building data from each city, theresearchers simulated conditions of a typical, two-story officebuilding; a one-story retail building; and a four-story apartmentbuilding in Bismarck, N.D.; Minneapolis, Minn.; St. Louis, Mo.; Miami,Fla.; and Phoenix, Ariz. Each building was modeled with wood frame andmasonry construction. Methods for increasing air tightness includedbuilding wraps or coatings for masonry blocks. The study focused onchanges in energy expenditures as a result of increased airtightness,not on the methods themselves, so it does not single out a "best"airtightness method.

For the frame construction, the combined annual gas-electriccost savings of improved airtightness would be 33 percent for thehypothetical office building, 21 percent for the retail building, and31 percent for the apartment in Bismarck. In Minneapolis, the predictedsavings would be 37 percent, 26 percent and 33 percent, respectively.In St. Louis, the numbers would be 37 percent, 24 percent and 31percent.

Improved air tightness in the warmer climates would produce smallersavings but could still be significant in the long run. In Phoenix, theestimated cost-savings are 10 percent, 16 percent and 3 percent for theoffice, retail and apartment, respectively; and in Miami, the estimatesare 9 percent, 14 percent and 9 percent.

Predicted savings for the masonry buildings were similar to theframe construction. Although not evaluated in this report, improvingbuilding envelope airtightness also reduces the potential for problemscaused by air leakage such as poor indoor air quality, thermal comfortand degradation of building materials due to moisture damage. (Likemost commercial buildings, the buildings in the study used mechanicalventilation systems to maintain good indoor air quality.)

The NIST findings are expected to be useful to the AmericanSociety of Heating, Refrigerating and Air-Conditioning Engineers(ASHRAE), which is currently considering updating building air leakagerequirements in its non-residential building energy standard 90.1.

Investigation of the Impact of Commercial Building Envelope Airtightness on HVAC Energy Use (NISTIR 7238) is available at http://fire.nist.gov/bfrlpubs/build05/art007.html.

###

The research was sponsored by the U.S. Department of Energy Office of Building Technology.


Story Source:

The above story is based on materials provided by National Institute of Standards and Technology. Note: Materials may be edited for content and length.


Cite This Page:

National Institute of Standards and Technology. "Simulations Predict Savings From More Airtight Buildings." ScienceDaily. ScienceDaily, 10 October 2005. <www.sciencedaily.com/releases/2005/10/051010100644.htm>.
National Institute of Standards and Technology. (2005, October 10). Simulations Predict Savings From More Airtight Buildings. ScienceDaily. Retrieved February 28, 2015 from www.sciencedaily.com/releases/2005/10/051010100644.htm
National Institute of Standards and Technology. "Simulations Predict Savings From More Airtight Buildings." ScienceDaily. www.sciencedaily.com/releases/2005/10/051010100644.htm (accessed February 28, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Saturday, February 28, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Elon Musk's Hyperloop Moves Forward

Elon Musk's Hyperloop Moves Forward

Buzz60 (Feb. 27, 2015) Zipping around at 800-miles an hour is coming closer to reality in California. An entire town is being built around Elon Musk&apos;s Hyperloop concept and it wants you to stop in for a ride when it&apos;s ready. Brett Larson is on board. Video provided by Buzz60
Powered by NewsLook.com
Vibrating Bicycle Senses Traffic

Vibrating Bicycle Senses Traffic

Reuters - Innovations Video Online (Feb. 26, 2015) Dutch scientists have developed a smart bicycle that uses sensors, wireless technology and video to warn riders of traffic dangers. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
In Japan, Robot Dogs Are for Life -- And Death

In Japan, Robot Dogs Are for Life -- And Death

AFP (Feb. 25, 2015) Robot dogs are the perfect pet for some in Japan who go to repairmen-turned-vets when their pooch breaks down - while a full Buddhist funeral ceremony awaits those who don&apos;t make it. Duration: 02:40 Video provided by AFP
Powered by NewsLook.com
London Show Dissects History of Forensic Science

London Show Dissects History of Forensic Science

AFP (Feb. 25, 2015) Forensic science, which has fascinated generations with its unravelling of gruesome crime mysteries, is being put under the microscope in an exhibition of real criminal investigations in London. Duration: 00:53 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins