I made a stupid mistake of submitting a proposal for an industrial kitchen without studying first what was about. It happens that it has surface of 1200 sq.m. and there many problems and in addition, they are demanding compressed air and instant hot water in the faucets. My price was for a restaurant. After a week it is still incomplete. I am calculating the energy loss in the 140 meter long hot water re-circulation main line.
The significant variable is the thickness of the pipe isolation. Above 1 inch thickness flexible elastometric (pic), the energy loss stabilizes and it is insignificant. Ali Express (Chinese) offers impressive samples I have never seen before. Like the Japanese that liquidated the Swiss watch and camera industry, the Chinese are leveling the industrial materials market. They are superior and cheaper.
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