[thechat] Energy Conservation (Was: Your dream house: what tech stuff?)

[Martin Burns]

On 25 Oct 2006, at 20:03, Hershel Robinson wrote:

> Anyhow, these on-demand systems are FAR more energy efficient than a
> tank. This should be self-evident--a tank is sitting with hot water  
> when
> you may or may not need it, but the on-demand systems are dormant  
> until
> you need them, and they only heat what you need.

Oh true, but it depends on what temperature you want out of them.

Also, you'll note that output temperature depends to a *high* degree on
water flow (and hence on pressure and hence on what other water use
is going  on in the house). Having a shower when the dishwasher kicks
in is a fun and interesting experience. And if you've a sensitive  
thermostat,
it's even *more* fun :-)

Cheers
Martin

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