State Codes
With What Code Must
My Window Comply?
Two web sites exist
that will direct commercial and residential users to the proper
energy code for your location. First, click on the Alliance
to Save Energy's Building Code Assistance Project web page:
Once
there, click on the United States map. Once that page is
open, select your state from the drop down menu in the middle
of that page. Read under the heading "Current State
Codes" to determine the proper code.
Next,
click on the Responsible Energy Code Allicances Web site.
Once
there, click on the image with a map under the heading, Interested
in determining the IECC® provisions as they would apply to
your state? Now choose the proper IECC year that the BCAP
web site indicated from the proper dropdown. An embedded
PDF will open showing a state map and a list of various U-factors
and SHGC. Find your county. It will be listed in a
table on that state's PDF image. The county will correspond
to a zone. Match the zone to the proper columns on the U-factor
and SHGC table. This is the required code level!
US DOE Approves ASHRAE
90.1-2004 (December 2008)
The
U.S. Department of Energy (DOE) has ruled that all states must
certify that they have state energy codes in place that are at
least as stringent as ASHRAE Standard 90.1-2004, or justify why
they cannot comply. The ruling requires states to comply with
the 2004 version of the standard, rather than the less-strict
1999 version. The ruling was published in The Federal Register
on Dec. 30, 2008. For more details.
NFRC
100 and 200 (or ASHRAE prescribed defaults values) are required
for commercial (non residential) window ratings in ASHRAE 90.1.
Most states reference a version of ASHRAE 90.1 for their commercial
building energy code. NFRC participants should monitor state
code developments for a likely increase in energy code stringency.
Exceptions
Some
states do now reference IECC codes. If your state does,
not list the code on the BCAP web page, read towards the bottom
of the web page under web links. These links will take you
to the state's code. Unfortunately, RECA nor any other authority
has extracted out the necessary codes for windows and walls.
You will have to read the code. Please call NFRC to ask
specific questions on your states codes.
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