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Gas Boilers Wall-Mounted Furnace 20 Plates Flat Parallel Water Flow Heat Exchanger How to make a choice the plate warm temperature exchanger right for you ?1. First verify the number of plate warmth exchangersYou can verify the side logo of the unique board changer, and you may additionally measure the thickness. Confirm back whether or not the water move is parallel or crossBlow from one port to look which port the air comes out from on the opposite side, if it comes out from a parallel port, it's a parallel circulate it comes out from the other nook of the mouth, it is the correct communication3. Confirm whether or not or no longer the water outlet is crimped or flat4. Measure the space between the two screw gap