The rink at Mars Lakeview Arena in Duluth, Minnesota, maintained a full-size ice sheet with 1,750 pounds of R-22. The converted DX chiller system runs on a non-ozone depleting, low-GWP refrigerant , R-449A.
from Odor Management Plan in Controlling Smoke Odor http://bit.ly/2WPHRqZ
via http://bit.ly/2R7558e
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