Open system = Legionella as well a host of other of issues
I was reading a post on HeatingHelp.com which is a website someone here referred me to. I came across this article where someone was doing a under sub-floor pex radiant system and man poster went off on him on the health issues involved with Legionair’s desease as well as other health issues. It seems the water has to be over 120 degrees to kill off this bacteria but as water goes through the pipes it lowers recreating the problem. Talk about blue and green bacteria growing stuff in the PEX so I am wondering if any of this is familiar with people here.
It may be they are also using this open system for heating the floors and the same water for household use from a single water boiler. Below is a short cut and paste – can someone please explain what they are talking about and is it safe to have floor radiant heat? Seems hot water going to an air handlers and radiators for many decades – maybe it has something to do with open vs a closed system of water use. Here is part of the post
“Open system = Bad News”
Open hydronics systems like that one are illegal in most places and are breeding ground for Legionella as well a host of other issues.
The tankless water heater is not designed, controlled or approved for space heating. It also will have no warranty if installed like that and probably won’t last 3 years.
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