[RE-wrenches] On demand WH

[Bill Loesch]

Hi Dick,

Following the Carter era oil embargo energy awareness, pilot lights were 
reduced from ~700 BTU/h to ~ half. In a tank, that heat is put to 
amazingly efficient use; not so with a tankless.

In places where they take energy usage seriously, the pilot light is lit 
only when the tankless is going to be used. A piezo igniter is standard 
on the standing pilot natural draft heater identified earlier.

For all those folks with a tank, using it as a batch heater with the 
circuit breaker or pilot gas selector also eliminates the majority of 
standby loss. My pet peeve is folks who unwittingly heat the water well 
past the using temp and temper it with cold at the faucet.

Glad you are pleased with your tankless operation,

Bill Loesch
Solar 1 - Saint Louis Solar
314 631 1094

On 30-Sep-13 7:29 AM, Richard L Ratico wrote:
> As concerns standby loss, I can't speak to the others, but the Rinnai has a
> simple on/off button on the front of the unit. A remote controller is available
> which also provides the switch. It does take afew seconds for the unit to boot
> up. Up to three remotes may be installed, making the on /off operation and
> temperature adjustment fairly convenient.
>
> Been using a Rinnai here, on grid for 10 years or so. It works. We like it.
>
> I understand a pilot uses a significant amount of gas over the course of a year.
> Just sayin'.
>
> Dick Ratico
> Solarwind Electric
>
> --- You wrote:
> If its a Rinai, I measured one once that was 30 watts AC standby, and
> jumped a bit higher when firing.  It also needed pure sine.
> The customer swapped it for a regular hot water tank.
> Some Bosches and old Palomas, etc. had either a piezo ignition or pilot,
> but took no power.
> I'm working on a system with one now that needs 12vdc at about 5 watts.
>
> R.Ray Walters
> CTO, Solarray, Inc
> Nabcep Certified PV Installer,
> Licensed Master Electrician
> Solar Design Engineer
> 303 505-8760
> --- end of quote ---
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