S&A CW-5200 Series Industrial Water ChillerS&A CW 5200 industrial water chiller is the best fit to cool CO2 laser machines. The 1. 85 gallon (7L) water tank runs at 3. 4 gpm to remove heat from the CO2 laser tube. With cooling capacity up to 5699Btu per hour and temperature error within 0. 5C, CW 5200 can easily cool down up to 150W CO2 laser tube. This water chiller has a cooling capacity of 1400W and has been awarded a design patent certificate, as well as CE and RoHS certifications.