[cute fuzzy bunny]

I tried a small electric unit in my kitchen for a few years, then the sucker started leaking like a sieve. One of my buddy's who is a plumber said that all of the small electric units stink and do that after a year or two. I took it out.

Problem you'd have in a multiple install situation is cost. A decent electric unit in each area would cost you a couple of thousand bucks to buy, not to mention the installation...even electric units need an overflow/pressure drain. Cheap ones are gonna leak.

Coolest option I've seen was a small electric pump with a timer installed between the hot and cold in remote bathrooms. At a specific time of the day, usually 5-10 minutes before you usually take your morning shower, the pump starts and transfers water from the hot water pipe to the cold water pipe until the water from the hot pipe is actually hot. Water taken from the 'hot' pipe goes into the 'cold' pipe, which ends up back in the hot water heater as you drain it from the 'hot' side. Sort of does the 'run the water for 5 minutes' thing for you, without wasting the water. Its an easy install, you remove any pair of hot/cold valves under a sink in the bathroom, screw on the inlet/outlet connection from the pump, screw the hot/cold valves back on over the inlet/outlet connections, wire into the A/C, set the timer, voila. I havent tried them yet, but I was going to in my old mcmansion. New house has the kitchen and bath close to the HWH.