Radiant heating and cooling ceiling systems for the hydronics contractor

It seems that early thoughts about radiator color were actually somewhat incorrect: Shiny metallic paint colors suppressed the ability of a heated surface to send out radiant energy waves. When testing non-metallic colors, there was a significant increase in the emissivity of a heated surface. Many of these painted radiators worked just fine, indicating that they were significantly oversized in the first place. It then became a standard recommendation in situations where overheating was occurring to paint the offending radiators a metallic color to help suppress their output.

This is my second column in a series of articles about radiant ceiling heating and cooling systems. My next experience with radiant ceilings was an artistic radiator that I built and installed in my home office basement. It was similar to a panel radiator, except that it was completely made of copper.

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