Measuring of heat or cold in water up to a dimension DN 1000

Ultrasonic heat and cold meter Summer has left our streets in the Central Europe and winter is quickly approaching. Air conditioning machines are getting to hibernate and heating will take the control again. Do you know how to measure consumption of heat or cold in water up to dimension DN1000? Our heat/cold meters SONOTHERM SN30X0 are intended for measurement of absolute heat/cold quantities delivered to customer plants or otherwise consumed in closed hot-water heating/cooling systems. Large heat exchangers or air conditioning equipment can rely on the accurate measurement even in case of large dimensions of the piping system, which means properly quantify the cost of heating or cooling.