Inquiry (采购产品): double wall heat exchanger We are an OEM motorhome mfg and would like to get information on your double wall constructed heat exchanger. We want to heat potable tap water with the engines 50/50 ethylene glycol coolant and know we're safe. **** Hidden Message ***** JOH KALMBACH 3631 S. BAGLEY AVE. FRESNO, CA 93725 USA Company: SPORTSMOBILE WEST, INC. Title: VP Phone: 559-233-8267 E-mail: j.kalmbach@sportsmobile.com **** Hidden Message ***** j.kalmbach@sportsmobile.com