EcoRenovator - View Single Post - Pre-heating shower / sink water

Xringer · 11-14-11, 09:48 AM

IMHO, any scheme to pre-heat the hot water in the line, for instant access,
is going to have a considerable heating cost (per year). Even with good insulation on PEX pipes.

I would recommend doing the math, before going after this problem.

Most times, when I'm washing up or washing something in the sink,
I don't just stand there and let the lukewarm water run down the drain. It gets used.

It might not be convenient, to wait for the water a couple times a day, but it's
going to more economical in most cases.

I think that 1/2" PEX with insulation over it, is about as far as I'm willing to go..

11-14-11, 09:48 AM	#16
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	Is is ECOnomical? IMHO, any scheme to pre-heat the hot water in the line, for instant access, is going to have a considerable heating cost (per year). Even with good insulation on PEX pipes. I would recommend doing the math, before going after this problem. Most times, when I'm washing up or washing something in the sink, I don't just stand there and let the lukewarm water run down the drain. It gets used. It might not be convenient, to wait for the water a couple times a day, but it's going to more economical in most cases. I think that 1/2" PEX with insulation over it, is about as far as I'm willing to go.. __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..