Calculating the water volume of a heating system

[ConorM8350]

Can anyone give me a specific way to calculate the water volume within a heating system? I'm trying to work out if an existing installation would benefit from an expansion vessel.

 

[Pope John 2]

Can anyone give me a specific way to calculate the water volume within a heating system? I'm trying to work out if an existing installation would benefit from an expansion vessel.

Mr Combi Training has an android app for rads and expansion vessels and lots more most are free and brilliant

Mr Combi: Combination Boilers, boiler installation training Bedford UK