Part One Disapproved; Part Two Approved as Modified by Public Comment
After drawing much debate during the ICC code hearings this week,
EC22 part one was disapproved as previously recommended by the code
committee. Part two, however, was approved as modified by public
Part one called for changing glazed fenestration solar heat gain
coefficient (SHGC) requirements in zones one and two from 0.37 to
0.30 and zone three from 0.40 to 0.30 as well. Original and primary
reasons included the impact low SHGC windows have by reducing cooling
energy use and increasing heating energy use. The committee's basis
for recommending disapproval was in anticipation of consideration
of more aggressive values in EC24 and EC26.
Several spoke in favor of the committee's motion to disapprove
part one, many agreeing that changes in EC26 represented a suitable
"I support the committee, but I do think that some of the
proposals in EC22 part one would be improvements over the current
energy code, but I think EC26 does a better job and was approved
by the committee," said Garrett Stone representing Cardinal
Glass. "I would therefore suggest it instead,"
Tom Zaremba, speaking on his own behalf, pointed out differences
in EC22 and EC26 regarding hurricane protection.
"This particular proposal, EC22, has a hurricane exemption,"
Zaremba said. "EC26, as it was modified, does not. I urge you
disapprove the committee's recommendation and move on to the opportunity
to consider the public comments."
Tom Culp representing the Aluminum Extruders Council spoke in opposition
to the committee's recommendation. One of Culp points referenced
what he saw as an oversight in previous discussions involving skylights.
"I agree, there are a large number of products available to
meet the 0.30 requirement," Culp said. "However, the bulk
of the products in the NFRC are your standard, double-hung windows.
But this code and its requirements apply to all products and we
need to account for that. It also applies to skylights and I think
a lot of people forgot about skylights when this was being debated."
Culp argued that a 0.30 requirement represented a conflict of interest,
based on the purpose of installing and using skylights. "The
whole purpose of a skylight is to bring in light and, yet, the 0.30
requirement will tend to decrease visible light transmittance,"
he said. "It's going against the whole purpose of having a
Culp suggested the 0.30 level was a suitable goal for the future,
but perhaps a bit premature. "The 0.30 requirement does save
energy, but it's a little too far at this time," he said. "The
0.35 is more reasonable. The way to do that is you overturn the
committee and then you get consistency with some of the public comments
The committee also motioned for disapproval of EC22 part two. Suggested
changes in part two also included adjusting SHGC ratings for insulation
and fenestration requirements by component to 0.30 in zones one
through three. Public comment two called for softening those requirements
to 0.35, which was ultimately approved as submitted.
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