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As manufacturers research the viability of low-GWP and other natural refrigerants, they face the concurrent challenges of ensuring compressors are efficient, safe, and reliable.

A new study conducted by AHRI's Zone Control System Technology product section revealed that bypass-type single-stage cooling zoning systems may positively influence an HVAC system’s EER.

Now in its sixth year, the ranking examined the total institutional and commercial square footage of LEED-certified space per resident certified throughout 2015, based on U.S. Census data. Illinois retained its top national position for the third year in a row, with 161 LEED certifications representing 3.43 square feet of certified space per resident.

The law allows a tax credit against the income tax liability of a taxpayer equal to 25 percent of the costs incurred by the taxpayer in the purchase and installation of geothermal machinery in or on a facility in South Carolina and owned by the taxpayer. 

HVAC contractors seem to be feeling cautiously optimistic about short-term growth, at least according to ACCA, whose Contractor Comfort Index (CCI) scored a 76 in January 2016. But, there is still concern about the U.S. economy and conditions around the world, in general.

While ACCA and its members had a successful year, there were a number of challenges the industry faced as a whole. Some of the biggest were keeping up with the regulatory proposals and bills in Congress.

EDITOR’S NOTE: This is part two of a two-part series. The first part, "Tips for Surviving Refrigerant Transitions, Part 1," appeared in the Feb. 1, 2016, issue of The NEWS.