harry wrote:
On Feb 11, 7:39 pm, DerbyDad03 wrote:
True or False?

A hot water recirculating pump won't decrease the amount of time it
takes to get hot water to a fixture, it will only eliminate the waste
caused by the water running down the drain.

True, right?

(Another Ask This Old House inspired question)

Large buildings have domestic hot watercirculating pumps.
This is so that a lot of cold water does not have to be drawn before
the hot water becomes available.

However, there are huge heat losses from the hot water pipework as
water is constantly circulated in the same way as a heating system.

Which, in the winter, is just a little extra heat replaceing heat to be provided
by the furnace. In the summer, it's heat fighting the A/C, if any.