The Baxi Condensing Combi 133 HE Plus boiler comes with a maximum heat output factory set at 80,000 BTU, you can increase this to 100,000BTU by fitting an extra Grundfoss 15/50 or 15/60 pump. Does anyone have any experience of having two pumps in a boiler?
I've not come across this before, is it a good idea?
I've not come across this before, is it a good idea?