Question: cast iron radiators & paint

todd_14

Does cracked and peeling paint on a radiator significantly reduce heat output?? 

Does bare cast iron give off heat better than painted surface? 

It is a not a metallic color.  

Thanks for you input 

Jamie Hall

No, it won't change the output significantly

hot_rod

I would say any insulative coating will slow the heat emission. Bare cast should have a slight advantage, to a painted surface. Older radiators can often have many layers of paint, each layer adding some resistance.

If so the cracks give you some exposed metal .