Design and Construction:

Many "like" designs aren’t like the RinkWater at all.  They are a fibreglass system that tends to let all the heat out and be very "DIY" concept.  Here is a photo of what used to be acceptable in City and Community Parks up until today:

Great concept but expensive!  No hose management, no efficient use of heat and very susceptible to heat loss, vandalism, freezing, etc.