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Who on this list is casually dismissing the codes (no one I heard)?
And how many on the list dont have the codes you have in your region
(e.g., most)?<br>
<br>
We were discussing what the actual risks were, and you dismissed
(casually or not I cant say) the factual scientific information
because, as far as I can tell, it was not the same as what your code
tells you to do. In short, you did not seem to like the results of
the "homework" that others were presenting.<br>
<br>
Mike O'Brien's list is supported by experience and pretty solid
research going back decades. <br>
<br>
Based on the information in the discussion, someone in the US, where
codes dont require 60C (140 F) and 45/50 supply (most of the US),
could now make an informed choice about setting their electric
storage tank to 60C (to control Legionnaires) and use a tempering
valve to reduce supply temp to 48C (120F) to reduce scalding risk.
Even though the code does not require it.<br>
<br>
And some of the professionals on the list could now assemble the
information to support setting the hotwater temperature in their
instantaneous or storage gas heater to 50C in code jurisdictions
where there are rules of 60C. Seems like you already have that in
your code for instantaneous gas, we do not have that in Ontario.<br>
<br>
And then of course you need to give some thought to the distribution
system. As we move from copper to PEX for supply water, the risk
caused by stagnant water clearly goes up, but I have not seen the
studies to quantify this. There are lots of good practice things to
do that can manage this risk well however. <br>
<br>
Dr John Straube, P.Eng.<br>
<a class="moz-txt-link-abbreviated" href="http://www.BuildingScience.com">www.BuildingScience.com</a><br>
<br>
<br>
On 11-12-30 11:29 PM, Nick Pyner wrote:<br>
<span style="white-space: pre;">> Indeed. And like I said - if
you have codes, that is where you look<br>
> first. I didn't say anything about following rules blindly,
I'm<br>
> currently in the business of trying to change them, but
casually<br>
> dismissing them is not usually a good idea, particulalrly in
this<br>
> arena.<br>
> <br>
> Nick Pyner<br>
> <br>
> Dee Why NSW<br>
> <br>
> -----Original Message----- From: John Salmen<br>
> [<a class="moz-txt-link-freetext" href="mailto:terrain@shaw.ca">mailto:terrain@shaw.ca</a>]<br>
> <br>
> Funny comment to make.<br>
> <br>
> If you do something different (aka not follow the rules
blindly) then<br>
> in terms of community and pushing the boundaries you do need
to do<br>
> the homework<br>
> <br>
> </span><br>
<br>
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