maintaining clearances to ceiling as noted in Figure 7. This will give you center of hole for chimney penetration.
4.After locating center of penetration, install tee box and chimney as per chimney manufacturer's specifications.
5.Connect chimney collar to tee-box using #24 ga. minimum blued or black steel connector pipe. (DO NOT USE GALVANIZED PIPE). Connect each section so crimped end faces downward and secure each section to each other using three (3) sheet metal screws or rivets.
C. Wall Exit Into Masonry (Using Single Wall Pipe)
1.Before connecting this unit to a masonry chimney, determine that masonry fireplace wall pass-through connector thimble meets NFPA-211Code and local building codes and is a minimum of 18" from ceiling. If connector thimble does not meet these codes, the pass -through connector must be modified. (See Figure 8).
Figure 8
Connectors may pass through walls or partitions constructed of combustible material if connector is:
(a)Either listed for wall pass-through or is routed through a device listed for wall pass- through and is installed in accordance with conditions of listing.
(b)Selected or fabricated in accordance with conditions and clearances as stated in NFPA -211Code. Any unexposed metal that is used as part of a wall pass-through system and is exposed to flue gases shall be constructed of stainless steel or other equivalent material that will resist corrosion, softening, or cracking from flue gases at temperatures up to 1800o F.
