For some reason the manufacturers don't seem to want to give Americans real data about performance. Maybe we are not trained enough to understand it but in Europe that info is front and centre. The standard there is to measure performance at a given air entering temp and water leaving temp.
In the one below they quote the standard of A2W35C and A2W55C to give your COPs.
Other manufacturers I have seen give the data at A-7W35 as well as at 2C. There is a lot more info in that number than we get especially if we have 2 numbers than we can make an output graph.
|