What fans are used in the Windtunnel Assembly and what are their specifications?
The Multimatic 255 uses two Muffin fans (FM1 and FM2), Part No. 278710, rated at 24 VDC, 8000 RPM, and 175 CFM with 3.248 inch mounting holes. They are housed within the Fan Assembly (Part No. 278711) in the Windtunnel Assembly.
From the official Miller Multimatic 255 Multi-Process Welder manual, page 11
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