Anytime a radiator is initially filled, like in a car, it's? typ? vac filled.? ?The last thing you want is trapped air? anywhere in the loop.? ?That would be a disaster on a 100 kw water cooled tube.? ?I'm assuming the large air cooled radiator will be outside the shop, ( to dump the heat to the outside)..... so lengthy water lines? will be involved.? IE: the total loop distance has increased.?
