Craftbeerpi

[terragady]

do you really need radiator facing outside? How warm it is during usage? Did you try?
I have 2kW and wondering If I can put it inside.

[darren996]

I put mine on the outside as it gives me more room on the inside,  i will attach an earth wire as well. The heatsink will perform better on the outside  but a lot of people put them inside the box for neatness and have no problems.

I have an ardbir with a similar setup running a 2.5 kw element,  it gets hot but nothing major.

[molc]

Yeah I have 2 heatsinks enclosed running 2 2.8kw elements. It gets warm but not hot.