It joins 15 other unions and environmental groups — including the sheet metal products making Sheet Metal Workers union — that are part of the alliance.
The company said New York-based High Road Capital Partners completed the sale of the specialty hand toolmaker Feb. 4, but it was not announced until May 28.
The public is invited to voice its opinion on a HVAC market guideline on the design and use of HVAC systems for rail passenger vehicles at www.ashrae.org/publicreviews until June 30.