Osburn Stoves by SB I HYBRID 35 User Manual

 

NOTE: Follow L-Vent chimney manufacturer’s instructions. 
 
1.  Have the masonry chimney inspected by a qualified chimney sweep 

or installer to determine its structural integrity. 

 
2.  You must run a pipe from the stove outlet to 18 inches above the top 

of the chimney. 

 
3.  Install a blanking plate and the chimney pipe, and if used the outside 

air pipe, as shown in Figure 20. 
 

4.  Attach the DuraVent adapter, a section of pipe and clean out tee, 

making sure the clean out tee is centered in the chimney flue area. 
Use RTV, metallic tape, and a minimum of three self-taping screws at 
all joint connections to ensure a tight seal. 
 

5. 

Position the stove, adhering to the clearances in Figures 1 & 2. 

 
6.  Measure and build chimney top plate. Cut out holes for chimney pipe, 

and if used the outside air pipe. Install and seal with flexible 
waterproof sealant to prevent water leakage. Install vent cap. 

 

 

CLEAN OUT
TEE

OPTIONAL
OUTSIDE AIR

BLANKING PLATE

FOLLOW CHIMNEY OR 
VENT MANUFACTURER'S 
INSTRUCTIONS

3"

TOP PLATE

VERTICAL ROOF VENT

18"

 

Figure 20 

Venting through masonry 

 chimney 

NOTE: Follow L-Vent chimney manufacturer’s instructions. 
 
1.  Position the stove, adhering to the clearances in Figures 1 & 2. Mark 

the center of the hole where the pipe is to pierce the masonry 
chimney. 

 
2.  It will be necessary to cut out the masonry around the location of the 

pipe center mark.  Cut a 4-inch diameter hole for 3-inch pipe and 5-
inch diameter hole for 4-inch pipe. 

 
3.  Measure and build chimney top plate. Cut out holes for chimney pipe, 

and if used the outside air pipe. 

 
4.  Install the tee on the bottom of the vertical pipe system and lower it 

down the chimney until the center branch of the tee is level with the 
center of the hole in the masonry, as shown in Figure 21. 

 
5.  Install and seal the top plate from step 3 with flexible waterproof 

sealant. Slip the storm collar over the pipe, and while holding the pipe 
at the proper elevation, affix the collar with a minimum of three 1/4” 
stainless steel sheet metal screws. Seal all joints and seams around 
the collar. 

 
6.  Connect the horizontal pipe by pushing it through the hole in the 

masonry and lining it up with the branch in the tee. Push the pipe into 
the tee while twisting it to lock it into the tee. 

 
7.  If desired, once the horizontal pipe is in place, the space between the 

pipe and masonry may be filled with high-temperature grout. 

 
Install the trim collar. An adjustable pipe length and adapter may be 
needed to align and complete the connection to the stove.

 

WALL

THIMBLE

CLEAN OUT
TEE

FOLLOW CHIMNEY OR 
VENT MANUFACTURER'S 
INSTRUCTIONS

OPTIONAL

OUTSIDE AIR

3"

TOP PLATE

VERTICAL ROOF VENT

18"

 

 

Figure 21 

Venting through side of 

masonry chimney 

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