Heat & Glo LifeStyle PALOMA-BZ-MOD Continue to assemble pipe sections until the height

3. To install the round support box/wall thimble cover in
a flat ceiling, cut a 10 in. (254 mm) square hole in the
ceiling, centered on the hole drilled in Step 2. Frame
the hole as shown in Figure 5.13.	SHINGLES OVERLAP ON	CAP AND STORM
	TOP EDGE OF FLASHING
		COLLAR NOT SHOWN
		FOR CLARITY
CEILING JOISTS
FRAMING

ROUND CEILING

SUPPORT BOX/WALL

THIMBLE COVER

Figure 5.14

	1-1/2 in. (38 mm)			7.	Continue to assemble pipe sections until the height of
	LONG WOOD
	SCREWS				the vent (before adding the termination cap) meets the
	Figure 5.13				minimum code requirements as outlined in the current
					CAN/CGA-B149 Installation Codes (in Canada), the
4. Assemble the desired lengths of		pipe and elbows			National Fuel Gas Code NFPA 54/ANSI Z223.1 (in
					USA), or local codes. Note that for steep roof pitches,
	necessary to reach from the appliance up through				the vent height must be increased.	See Roof Pitch
	the round support box. Ensure that all pipe and elbow				Table (Figure 4.2, on page 9). In high wind conditions,
	connections are in their fully twist-locked position.				nearby trees adjoining rooflines, steep pitched roofs,
	Assemble as instructed.				and other similar factors can result in poor draft, or
5.	Cut a hole in the roof centered on the small drill hole				down drafting. In these cases increasing the vent
	placed in the roof in Step 2. The hole should be of				height or switching to the high wind termination cap
	sufficient size to meet the minimum requirements for				may solve this problem.
	clearance to combustibles, as specified.		Continue	8.	Slip the storm collar over the pipe, and push it down
	to assemble lengths of pipe and elbows necessary				to the top of the flashing (Figure 5.15). Use non-
	to reach from the ceiling support box/wall thimble up				hardening sealant above and below the joint between
	through the roof line. Galvanized pipe and elbows may				the storm collar and the pipe.
	be utilized in the attic, as well as above the roofline.
	The galvanized finish is desirable above the roofline,
	due to its higher corrosion resistance.
	• If an offset is necessary in the attic to avoid
	obstructions, it is important to support the vent pipe				OPTIONAL HIGH WIND
	every 3 ft. (914 mm) to avoid excessive stress on the				TERMINATION CAP
					SECURE FLASHING WITH
	elbows, and possible separation.	Wall straps are
	available for this purpose, Figure 5.12, page 16.				NON-HARDENING SEALANT AND
					ROOFING NAILS
	• Whenever possible, use 45° elbows, instead of 90°
	elbows. The 45° elbow offers less restriction to the
	flow of flue gases and intake air.
6. Slip the flashing over the pipe section(s) protruding
	through the roof. Secure the base of the flashing to
	the roof with roofing nails. Ensure the roofing material
	overlaps the top edge of the flashing as shown in
	Figure 5.14. Verify that the chimney is the required
	height above the roof. See roof pitch table, Figure 4.2,
	on page 9.
				Figure 5.15
	Heat & Glo • PALOMA-BZ-MOD, PALOMA-GR-MOD, PALOMA-GY-MOD • 2189-900 Rev. i • 5/12					17