[Greenbuilding] tankless and radiant floor heat

[Lynelle Hamilton]

A slow leak?  A loose fitting that's drawing air in?  Expansion when the 
pex is heated (I had this happen once--it was tight when not running, 
heating loosened a fitting and drew air in. There was water, but it 
wasn't a gusher...more of a trickle and wasn't immediately noticed by 
the heating tech.  Actually , I noticed it and pointed it out.  He told 
me I was crazy until he looked for himself.)

Lynelle

On 08/02/2011 9:02 AM, Sacie Lambertson wrote:
> Yes presume there is air in the system; a long bleeding 'cures' it 
> temporarily.  Suggest something else is amiss.   What?   Sacie
>
> On Tue, Feb 8, 2011 at 6:59 AM, jfstraube <jfstraube at gmail.com 
> <mailto:jfstraube at gmail.com>> wrote:
>
>     Standard PEX is rated at 180F @ 100 psi.
>     While I think 156 F is pretty crazy high, it is not too hot for PEX.
>
>     On 2011-02-07, at 10:41 PM, Clarke Olsen wrote:
>
>>     156*f is too hot for PEX! The problem is not with the
>>     temperature, it's with the circulators. Or, with air in the system.
>>     Clarke Olsen
>
>     John Straube
>     www.BuildingScience.com <http://www.BuildingScience.com>
>
>
>
>
>     _______________________________________________
>     Greenbuilding mailing list
>     to Send a Message to the list, use the email address
>     Greenbuilding at bioenergylists.org
>     <mailto:Greenbuilding at bioenergylists.org>
>
>     to UNSUBSCRIBE or Change your List Settings use the web page
>     http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org
>
>
>
> _______________________________________________
> Greenbuilding mailing list
> to Send a Message to the list, use the email address
> Greenbuilding at bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
> http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org