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A good read on high turndown burners and potential problems associated with high turndown. I'd imagine this would apply to smaller residential equipment also?
Thanks to David Connors with Patterson- Kelleyhttps://www.hpacmag.com/features/boiler-modulation-better/
Bob "hot rod" Rohr
trainer for Caleffi NA
The magic is in hydronics, and hydronics is in me