LAARS/Bradford White FT Wall Hung Combi and Heat Only(all sizes) AND Floor Boilers/Combi's-Common Venting
Common Venting is NOT approved for the LAARS/Bradford White Residential FT Wall Hung Combi or Heat Only or Floor Combi or Heat Only Boilers ! This applies to ALL BTU SIZES(100, 140, 199) of the Residential FT.
Adversely, the LAARS/Bradford White FT 301/399 Light Commercial Boiler MAY be common vented under strict adherence to instructions, material and components outlined in the IO manual section 4.11 , pages 30-35. Manual attached here (click on attachments) for your convenience