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on31ll
What one do you guys use ? And is there a big difference in the commercial one and the domestic ones ? I have taken on a lad who is newly commecial gas and me/the business is buying the flue gas analyser. He says he likes te testo ones so been looking at them and there is a domestic and a commercial one ? While reading i cant find a distinct difference although he assures me i need to get the commercial one. So basically what ones do you commercial lads use and does it have to be commercial or are the they same ?