Industry Alliance Releases PCR for
Processed Glass, Considers Generic EPD
he Glass Association of North the development of an industry-wide
“From a glass perspective, we now
America (GANA) and the In- Environmental Product Declaration have everything we need up through the
sulating Glass Manufacturers (EPD). The PCR establishes a rule for supply chain,” says SageGlass’ Dr. Helen
Alliance (IGMA) have jointly released doing life cycle assessments (LCA) for Sanders, who led the joint task group.
a Product Category Rule (PCR) for the development of an EPD.The groups
processed glass and are now deter- previously published PCRs for ﬂat glass
mining whether to move forward with and windows.
The task group worked with Under-
continued on page 34
Title 24 Update: What’s Ahead in California?
alifornia’s updated also focus on greenhouse gas emis- meet the Title 24 requirements, Nit-
Title 24 energy stan- sions. Legislation establishes that by tler said there are mandatory mea-
dards will take ef- 2020, emissions in the state must sures and prescriptive measures.
fect January 1, 2017, and meet 1990 levels. By 2050, green- The third concept is the performance
they include a number of house gases must be 80 percent approach. The latter allows a builder
changes that will affect below 1990 levels.
to use software to calculate energy
anyone who does To achieve that, the law says that calculation. Nittler said California em-
business in the by 2020, new residential construc- phasizes the performance approach,
state—one of the tion must be net zero energy and by because the prescriptive is some-
nation’s largest 2030 for commercial buildings. Nit- times too restrictive.
construction tler explained that net zero means
m a r k e t s . the building consumes only as much for trade-offs, Nittler said. (e.g., better
In Au- energy as can be generated by on-site windows vs. better air conditioning.) In
gust, the renewable energy systems. California, 90 percent of all compli-
American In California, buildings are sup- ance is via the computer performance
Architec- posed to be life-cycle cost-effective trade-off method, Nittler said.
tural Manu- to the building owner. The reference He added that you must under-
The performance approach allows
facturers Association (AAMA) hosted point typically is 30 years for resi- stand the compliance documents to
a webinar that covered this important dential and 15 years for non-residen- do business in California. In the new
Ken Nittler, the owner of WEST- demand in California is caused by air windows is 0.32 and the SHGC 0.25.
Lab, said the updated standards are conditioning. The use of Time Depen- “Almost all ﬂat glass guys have prod-
a reﬁnement to those in effect since dent Valuation (TDV) focuses empha- ucts in this category,” he said, adding
013. Most U-factor and solar heat sis on measures. To that end, a lower that replacement windows now must
tial. About half of the peak electrical standards, the residential U-factor for
gain coefﬁcient (SHGC) performance SHGC would help, Nittler said.
meet the U-factor and SHGC
The Title 24 standards in Califor- requirements.
He added that every fenestration
targets are unchanged, though he
called the standards “quite a bit nia are based on climate zones, he
more stringent overall. They should added. There are 16 in the state, and product in California must have a
be about 25 percent tighter.” they affect the regulations. For exam- label that lists U-factor, SHGC and
Nittler said that in addition to en- ple, there are no SHGC standards in visual transmittance, and certiﬁes
ergy efﬁciency, Title 24 standards the mild coastal zones 1, 3 and 5. To compliance.
USGlass, Metal & Glazing | October 2016