
Cap Maintain Manufacturer's Specified Minimum Clearance t **Maintain Support Strap\ Specified Clearance Maintain Clearance* f Vent Connector Chimney Flue Or Masonry Enclosure Venting Through Chimney With Type B Double Wall Vent Pipe, FIGURE 22. * Maintain vent pipe clearance requirements to local, state and/or the "National Fuel Gas Code", ANSI Z223.1(NFPA 54)-current edition. ** NFPA211, Standard for Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances states that these chimneys are i