Describe the Efficiency Improvement

it would not absorb the heat as much as if you painted it black. So, it wasn't doing anything when we had it sitting beside the wood stove. And I'm talking about maybe, yeah, 4 in from the wood stove, 5 in from the my dad's big wood stove. No heat absorption whatsoever. Painted it black, pre-warmed the water to about 104, 105° before it went in the water heater. So, my dad effectively figured