"Larry Bud" wrote in message
...
On Dec 19, 7:52 am, cln wrote:
I've seen a system lately that will wrap around your drain pipe and
extract the heat for drain water (shower or tub) and converted to more
heat.

Of course, the water coming out of the shower will be colder, and if
you want the same temp coming out, you'll use more hot water. There
is no free lunch!

If you understood the device he talks about, you'd know otherwise.