Installing B Vent Through Roof

What to know before you install b vent furnace pipe.

Installing b vent through roof.

Cut through the plywood and roofing material with your reciprocating saw. Install oval flashing storm collar and oval vent 1 inch minimum cap. With the pipe in a vertical position. Follow the outline you marked out.

What to know before you install b vent furnace pipe. Position the vent pipe up to the bottom of the roof. From up on the roof use a jigsaw or reciprocating saw to cut a 4 in. Figure 1 page 2 shows a system which passes through an occu pied second floor.

Any portion of the vent which passes through an occupied area must be enclosed to prevent accidental damage to the system as well as burns. Leave the drill bit sticking through the roof so you can find the hole. Start in the attic and drill a hole through the roof in the desired vent location. Go into your attic.

Page 26 6 inch oval gas vent for installation in 2 x 6 stud walls storm collar mh6375 category i appliances only ensure at least 1 inch clearance to all roof flashing combustibles including the area the pipe passes through the roof.