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flue gases with old CI rads on conventional gas boiler
kensheets2
Member Posts: 36
Hello
I understand that with low water temp installations such as radiant floor heating, return water temps will naturally be less than ideal. My question is if I am running an application using old cast iron rads with a conventional gas boiler and running water around 170-180 will I realistically still need to be concerned with low return water temps in relation to flue gas condensation?
Thanks
Ken
I understand that with low water temp installations such as radiant floor heating, return water temps will naturally be less than ideal. My question is if I am running an application using old cast iron rads with a conventional gas boiler and running water around 170-180 will I realistically still need to be concerned with low return water temps in relation to flue gas condensation?
Thanks
Ken
0
Comments
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Probably not. The concern arises when the return water to the boiler drops below about 140 -- and stays there -- while the boiler is running. Mostly a control issue. Make sure the boiler is set to hold a source temperature high enough, and to make sure there is enough circulation.Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England1
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