Osburn Stoves by SB I HYBRID 35 User Manual

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COMBUSTION AIR SUPPLY 
For a mobile home installation the stove must be connected to an outside 
source of combustion air. A 3” inside diameter metallic pipe, either flexible 
or rigid, may be attached to the inlet at the stove’s rear (refer to figures 4, 5 
& 6). A rodent guard (minimum 1/4” wire mesh) must be used at the 
terminus (refer to figure 5). All connections must be secured and airtight by 
either using the appropriately sized hose clamp and/or UL-181-AP foil tape. 
For mobile home installations only: combustion air supply conduit may 
not exceed 10 feet. 
Sources of Outside Combustion Air 
• 
A hole in the wall behind the stove.(Figure 5) 
• 
A hole in floor near stove rear terminating only in a ventilated 
crawl space.(Figure 6) 
WHEN OUTSIDE AIR IS NOT USED 
If outside air is not used, it is important that combustion air be easily 
available to the air inlet. A closable outside air register can be used in 
tightly insulated homes. 
VENTING 
The HYBRID-35 is certified for use with Vent type UL-103 or ULC S629M 
and Chimney type UL-641 or ULC S609, 3” or 4” diameter in size. This unit 
can be vented in an existing chimney with the addition of a liner if the 
chimney is more than 4” in diameter.  Class “A” chimney is not required. 
Refer to the instructions provided by the vent or chimney manufacturer, 
especially when passing through a wall, ceiling or roof. 
This is a pressurized exhaust system. All vent connector joints must be 
sealed with 500
°F (260°C) RTV silicone sealant to ensure consistent 
performance and avoid smoke and ash spillage. All horizontal connector 
joints must be sealed with UL-181-AP foil tape. We recommend that all 
vertical vent connector joints be secured with a minimum of 3 screws. 
DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE SERVING 
ANOTHER APPLIANCE. 
DO NOT INSTALL A FLUE DAMPER IN THE VENTING SYSTEM OF 
THIS UNIT. 
INSTALL VENT AT CLEARANCES SPECIFIED BY THE VENT 
MANUFACTURER. 
WARNING: DO NOT INSTALL IN BEDROOM 
CAUTION: THE STRUCTURAL INTEGRITY OF THE MANUFACTURED 
HOME FLOOR, WALL, AND CEILING/ROOF MUST BE MAINTAINED 
 
AIR
INTAKE
EXHAUST
 
 
Figure 4 
Rear view 
 
TRIM
COLLAR
RODENT
GUARD
 
Figure 5 
Fresh air supply 
 
VENTILATED 
CRAWL SPACE
 
 
Figure 6 
Ventilated crawl space