The recirculating pumps, like the Laing Autocirc can be set to turn
off by thermostat at 91F, or by a combination of timer and thermostat
that can be set in 15 minute increments throughout the day. For
example you could have it run for 2-hours in the morning when you take
showers, and 2-hours in the evening when you wash dishes, etc. We
just let ours run on the thermostat.

On 12 Mar 2005 14:37:57 -0500, wrote:

They do make recirculating pump gizmos...

You might power one with a $15 outdoor motion-activated light in a hallway.

Nick