Gas Boiler Parts thirteen Plates Flat Parallel Water Flow Auxiliary Heat Exchanger For Bosch New Star Eurostar Wall-Mounted FurnaceHow to make a call the plate warm temperature exchanger right for you ?1. First verify the variety of plate warmth exchangersYou can examine the component brand of the unique board changer, and you will also measure the thickness. Confirm again whether or not or no longer the water circulation is parallel or crossBlow from one port to see which port the air comes out from at the opposite side, if it comes out from a parallel port, it's a parallel move it comes out from the other nook of the mouth, it is the correct communication3. Confirm whether or not the water outlet is crimped or flat4. Measure the gap between the 2 screw gap