Reported to the industry in 2010, the low climate change impact refrigerators built in 2009, utilizing HBA2 blowing agent, exhibited 1.5 - 2.0% energy efficiency improvement, compared to baseline HFC-245fa.. This current study builds on the initial work with an optimized HBA2 formulation that demonstrates energy efficiency improvement exceeding 6% compared to HFC-245fa baseline, exceeds the current DOE Energy Star label by 9.5%., continuing to define the application and performance more broadly across the appliance industry. HBA2, in this commercial household refrigerator/freezer platform exceeded the proposed DOE 2014 energy standard. As with all new materials, prior to adoption, the industry requires an understanding of factors beyond the initial polyurethane performance characterization. These analyses include quality measures such as dimensional stability and adhesion to liner and exterior case. In all ancillary assessment related to a household refrigerator/freezer, met or exceeded all requirements. HBA2 regulatory approvals are in process in major markets, encompassing excellent properties of ultra low GWP (GWP = 7), non flammability, and anticipated to be non-VOC Commercial manufacture of HBA2 is estimated by 2013.
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