I have a job coming up in the northern climes. And need to install a block heater in my welder that part is straight forward. But a few years back I worked for a guy who had it set up so your welder was heated through your truck engine as you drove out to the job. Unfortunatly I have forgotten exactly how that was hooked-up so it would circulate . Has anyone seen this done and can help refresh my memory . Thanks
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