Removing heater unit

Clarki99

Paid Member
I am going to be removing the whole heater/air distribution unit soon from my 200 track car.

Just wondered - does the unit have its own heater running its own water that it heats or does it use hot water from the coolant system. Just asking so I know when I am disconnecting it all will I lose a lot of water from the engine coolant or just a bit from a self contained system?

Thanks Ian.