REFRIGERANT SWITCH: A Greenheck DGX-P116 Makeup Air Unit. Greenheck Fan Corp. has begun offering direct gas-fired makeup air units with the lower-GWP refrigerant R-454B. (Courtesy of Greenheck Fan ...
Today’s legal petition, filed by NC WARN, the Center for Biological Diversity and Appalachian Voices, argues that North Carolina law requires Duke Energy to seek prior approval before building ...
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