Hydronic heating system antifreeze Q
Hydronic heating system antifreeze Q
(OP)
Hi all,
I have a small boiler plant supplying hot water radiators. The boiler has to be outside but we get -10 sometimes warming up to +10 in the day say here. What are the pros and cons of using antifreeze? Is it a problem itself. Apparently some small packaged boilers just fire the boiler to take care of the freezing problem. What recommendations can you guy make? thank you for the help!
I have a small boiler plant supplying hot water radiators. The boiler has to be outside but we get -10 sometimes warming up to +10 in the day say here. What are the pros and cons of using antifreeze? Is it a problem itself. Apparently some small packaged boilers just fire the boiler to take care of the freezing problem. What recommendations can you guy make? thank you for the help!





RE: Hydronic heating system antifreeze Q
Another option is to use some electric heat tracing on the outdoor piping, but what is not known is whether the boiler is in a heated enclosure? Or is the boiler itself sitting outside in the open air?
RE: Hydronic heating system antifreeze Q
Yes the boiler itself is outside as is the expansion tank and pump. How about running the pump intermitantly to transfer a bit of heat from inside the building to stop freezing? I guess the expansion tank will still freeze though. Any thoughts?
RE: Hydronic heating system antifreeze Q
RE: Hydronic heating system antifreeze Q
I've never understood the outdoor boiler concept, unless it is a biomass boiler...
RE: Hydronic heating system antifreeze Q
RE: Hydronic heating system antifreeze Q
RE: Hydronic heating system antifreeze Q
RE: Hydronic heating system antifreeze Q
cheers
RE: Hydronic heating system antifreeze Q
Don't forget the combustion and relief air inlet/outlets as per gas codes for an enclosed boiler room.
RE: Hydronic heating system antifreeze Q
The wall hung option makes sense in this case because there are two zones that make sense, so i could use 2 x 25kw wall hung units, but.... the pumps that they have built in only deigned for a few meters of pipework in a domestic situation, how would one extend the range? use the boilers internal pump as a primary pump and then run a secondary pump off that loop?
Any ideas, comments, opinions?
RE: Hydronic heating system antifreeze Q
Yes, that's right. if the piping and terminal heating devices are low pressure drop type, then even the boilers' optional on-board circ pump could do it, but an add-on circ pump selected for the flow and head required for the heating system would be the right thing to do.