Releases Final Revised Criteria for ENERGY STAR®
April 8, 2009
The Department of Energy has released the final revised criteria
for ENERGY STAR-qualified doors, windows and skylights.
The final document includes the following aspects:
- Phased implementation. According to today's announcement
from DOE, stakeholders generally supported postponing finalization
of Phase 2 criteria. "Since it is still three to four years
until the likely effective date for these criteria, DOE is deferring
finalization of these criteria to allow for additional data collection
and analysis," writes Rich Karney, program manager, "The
Department will begin research on a Phase 2 proposal in late [Calendar
- Revised four-zone climate zone map. The revised map includes
four climate zones and geography-based zone names; the map included
in the March 11 release of the criteria was carried over.
- Category shift for sliding glass doors. Sliding glass
doors will now be present in the door category for the criteria,
rather than the windows category. "Stakeholders suggested
it would be easier for consumers to understand the separate criteria
for doors if they applied to all doors and left only windows in
the windows category," writes Karney. "The Department's
analysis showed that no significant savings would be lost by transferring
sliding glass doors to the door category.
- Revised criteria. In the North, DOE has retained the
criteria levels and limited tradeoffs from the Revised Draft Report.
HERE for related story.)With regard to doors, DOE had adjusted
the u-factor for doors in the < ½-lite category; in
addition, DOE has set the SHGC for doors to match the International
Energy Conservation Code (IECC). For skylights, the criteria listed
in the original draft will be retained, based on IECC levels.
- Tubular Daylighting Devices. While DOE says some stakeholders
had suggested that tubular daylighting devices be removed from
the program, DOE has decided to continue to include these under
the criteria for doors, windows and skylights, "under the
condition that manufacturers provide documentation showing the
product U-factors are rated under NFRC's computer simulation procedure."
- Insulating Glass (IG) certification. DOE will require
IG certification for ENERGY STAR-qualified doors, windows and
skylights as soon as NFRC makes this certification mandatory,
expected in July 2010.
- Shipment data requirement. While stakeholders supported
DOE's potential solution to the requirement for reporting product
shipment data, the final draft notes that this will help DOE measure
the impact of the program, but is still discussing whether this
method is plausible. The DOE plans to make a final decision on
this before Ducker Research conducts its next study of the door
and window market.
DOE rejected the following possibilities for the program:
- Exemptions for specialized products. Several industry
representatives suggested that DOE allow an exception to the U-factor
values for high-altitude products, whiles others suggested separate
criteria for high-impact products; DOE plans to compile data on
these topics and analyze it to determine if it should be used
in the Phase 2 proposal.
- Reference products for building packages. According to
today's announcement, some industry representatives had suggested
that a "package" of windows be allowed when equipped
with a single glass package but various operator types. The DOE
has rejected this suggestion, noting it could cause consumers
to "mistakenly believe all windows they purchased qualified
for applicable incentives offered in their region."
- Elimination of the map on the product label. Karney notes
that removing the climate zone map from the product label "would
compromise the effectiveness of the label for consumers."
- Air infiltration requirement. While some suggested that
there be a mandatory air infiltration requirement, DOE has not
included this in the new criteria, based on the fact that there's
not a consistent way to evaluate air infiltration performance
and for the consumer to verify performance claims, according to
- CPD number and code readjustment requirements. DOE has
eliminated these from the final criteria.
- Orientation, shading, and glazing requirements. DOE notes
that setting this was not feasible because it deals with the installation
of the windows and Energy Star typically is aimed at the replacement
market "where orientation and shading are predetermined."
"The optimal way to capitalize on these factors is to educate
consumers on their benefits," writes Karney.
The revised ENERGY STAR program requirements for doors, windows
and skylights will go into effect January 4, 2010. A transitionary
period will run through March 31, 2010.
HERE for full text of final criteria.
HERE for full text of Karney's letter.
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