Vertical Through the Roof Vent Assembly

Wall Screws

and Anchors

Snorkel

Termination

Cap

4” Clearance

Gravel

Drain

Window

Well

Waterproof Seal

Around PIpe

Firestop

ST218

Jefferson Direct Vent /Natural Vent Gas Heater

3.Cut the opening:

CFM System: 9³⁄₈” x 9³⁄₈” (240 x 240 mm)

DuraVent System: 10” x 10” (254 x 254 mm)

4.Plumb any additional opening through the roof or other construction that may be needed. In all cases, the opening must provide a minimum of 1” (25 mm) clearance to the vent pipe.

5.Place the stove in its ﬁnal position.

6.Install ﬁrestop(s) #7DVFS and Attic Insulation Shield #7DVAIS as needed. (Fig. 30) If there is a room above ceiling level, a ﬁrestop must be installed on both the bottom and top sides of the ceiling joists.

If an attic is above ceiling level, an attic insulation shield must be installed.

#7DVAIS Attic Insulation Shield

Fig. 28 Snorkel kit installation.

Recessed Wall

Sheet Metal

Screws and

Bracket

Wall Screws and Anchors

Firestop

Finishing Collar

Use Four

8d Nails

ST222

#7DVFS Firestop in Upper Floor

#7DVFS Firestop in Ceiling

Waterproof Seal Around Pipe

ST219

7” Pipe

Wall Plate

Fig. 30 Install ﬁrestops and attic insulation shield.

7.	Install the appropriate roof support and ﬂashing,
	making certain that the upper ﬂange of the ﬂashing
	base is below the shingles. (Fig. 31)
8.	Install appropriate pipe sections until the vent run

Fig. 29 Use extension brackets to mount snorkel against recessed wall.

Vertical (Through the Roof)

Vent Assembly

Note that all vertically terminated installations must, where speciﬁed, use the restrictor plate to comply with Vertical Termination Window (Page 9, Figure 8), included in the hardware bag.

Make certain the vent system conforms to all other requirements for vertical termination as speciﬁed on Page 9.

This installation will require you to ﬁrst determine the roof pitch and use the appropriate vent components. Refer to Figures 8 and 9 on Pages 9 and 10.

1.Locate the ﬁnal position of the stove, observing all clearances for both the vent and the stove.

2.Plumb to the center of the inner (4”) ﬂue collar from the ceiling above, and mark that location.

reaches above the ﬂashing. The enlarged ends of

the vent sections always face downward.

9. Install the storm collar and seal around the joints.

(Fig. 31)

10. Add additional vent lengths to achieve the proper

overall height.

11. Apply cement to the inner and outer termination col-

lars and install the terminal cap.

Venting System Assembly - Natural Vent

General Information

The Jefferson Heater is shipped from the factory as a Direct Vent Heater. It may be converted to a Natural Vent heater by installing the CFM Corporation Model Z31D00 FSDHAG Draft Hood Adapter.

The Jefferson Heater is approved for installation as a Natural Vent unit. CFM Direct Vent outer pipe (7FSSK) could be used directly after the Draft Hood Adapter

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