4. Pipe Insulation

All exposed pipes to and from the hot water cylinders and heating systems shall be insulated with pipe insulation material with an R-value in accordance with Table.

Piping to be insulated includes all flow and return piping, cold water supply piping within 1 m of the connection to the heating or cooling system and pressure relief piping within 1 m of the connection to the heating or cooling system.

Minimum R-value of pipe insulation
Internal diameter of pipe Minimum R-value
mm m².K/W
≤ 80 1,00
> 80 1,50