Neal Lewis Posted March 4, 2015 Report Share Posted March 4, 2015 A 320,000 BTU input steam boiler has two 7 inch connectors attached to the draft hood. They are connected to a seven inch vent connector and run into the chimney. Is this size adequate? I have a hard time reading the AGA vent charts. There was no scorching, backdrafting, etc. Thanks Click to Enlarge 29.64 KB Click to Enlarge 37.24 KB Quote Link to comment Share on other sites More sharing options...
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