Energy Environment  
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  
writers Laboratories (UL) to create the document references the North Amer- tural customers to meet the increas-  
PCR. It is based on revisions made to ican market and is consistent with the ing requirement to use products from  
the Institute of Construction and En- flat glass and window PCRs. Accord- manufacturers who have provided full  
vironment (Institut Bauen und Um- ing to the document, it is valid for five material transparency documentation,”  
welt e.V., or IBU) standard Part B PCR years ending in November 2020.  
says Sanders. “With LEEDv4 coming  
structure for Glass Wall and Ceiling “We will be able to provide EPDs into full effect … the requests from  
Coverings, 2014. With the revisions,the for processed glass to our architec- architects designing to this standard to  
provide EPDs for products will continue  
to increase. Now we have the baseline  
rules in place by which we can do life  
cycle assessments of our manufactur-  
ing process to provide these EPDs.”  
Processes covered in the new PCR  
include coated,laminated,heat-treated,  
decorative and insulating glass.  
The next step for the industry is to  
determine how it will move forward re-  
garding EPD development.Vik Ahuja of  
thinkstep discussed this during GANA’s  
fall conference at the end of August. He  
covered the pros and cons of the three  
options industry members have:  
Developing LCAs and EPDs  
Collaborating on an industry-wide  
EPD; or  
Doing nothing.  
In either of the first two cases,an LCA  
practitioner would be brought on to  
compile the data. The collaborative op-  
tion would take approximately twice as  
long—at least eight months—because  
it would require data collection from all  
participating companies to compile an  
aggregate average. However, members  
would share cost and establish a level  
playing field for all members.  
During the meeting,Mark Silverberg  
of Technoform North America also  
presented results from a recent survey  
of GANA members regarding LCAs and  
EPDs. He said he was surprised at the  
amount of inquiries respondents have  
been getting for them, and as a result,  
there seemed to be a general consen-  
sus among the industry. “At least two-  
thirds of members basically said they  
wanted an industry-wide LCA and/or  
EPD,” said Silverberg.  
Industry members will continue to  
discuss and determine which route they  
will take at upcoming meetings. n  
USGlass, Metal & Glazing | October 2016