main vent for a 1 piper

newagedawn

hello,
what would be a good vent for 1 pipe with 2- 1" returns. replacing boiler with an ect-3 with EDR load of 300 and Btu load 108,000. figured it was time to change them,lol

KC_Jones

Need to calculate venting requirements based on main pipe size and length. See the attached link for details. Many of us are recommending the Barnes & Jones big mouth vent. You can't really go wrong with it, but it's good to run the calculations so you can figure out your needs. With 2 mains balance is important.
https://heatinghelp.com/systems-help-center/new-resource-post-9/