On 3/1/06, Randall <email@example.com> wrote:
> > Are there plain storage tanks available that you could plumb in where
> > the old water heater was, and then use a tankless for heating?
> The tanks are available, but why ? You'd have to add a pump to circulate
> the water through the tank back into the heater, since otherwise it will get
> cold in the tank. And since you're still keeping a tank full of water hot,
> you lose all the supposed efficiency gains of the tankless.
One place that demand-driven water heaters really shine is where the
input water is pre-heated, or partially pre-heated. For instance, if
you've got a solar water heater, you can feed water that's 100F into
the on-demand heater, and heat it to service temperature. If the
water in the solar heater is already hot enough, you don't need to do