Required for brick finishes, or vinyl siding between 1 and 2 inches thick, when installing the matching Silhouette terminal. The SOST58B serves the 5 / 8-inch system with terminal ST58U-1. Select it by the approved appliance, terminal size and exterior finish—not by appearance alone.
| Manufacturer / MPN | Napoleon / SOST58B |
|---|---|
| Product type | Silhouette Brick Standoff Kit |
| Vent system | 5 / 8-inch direct vent |
| Terminal application | ST58U-1; horizontal termination only |
| Standoff depth | 4 inches |
Standoff assembly, eight W570-0022 screws and four W570-0004 screws. The fireplace, vent run and other installation components are separate.
Use only with the approved Wolf Steel direct-vent gas appliances and matching vent size listed in the manufacturer manual. The certified-appliance list is on page 4. Match the full appliance model and its installation instructions before selecting the route. This component is required only when the selected installation calls for it; it is not a mandatory addition to every fireplace.
For ST47U, finish material 1 inch or thinner, including vinyl, does not require an additional standoff. For ST58U-1, vinyl 1 inch or thinner requires SOST58; other finish material 1 inch or thinner does not require an additional standoff. Exterior finish between 1 and 2 inches uses the matching standard standoff. Brick or vinyl between 1 and 2 inches uses the matching brick standoff. Follow the finish-specific installation section.
Do not extend finish material beyond the terminal return flange. Keep all four air intakes and the exhaust port unobstructed. An accessible terminal requires the separately specified STS4758 terminal guard. The manual treats a terminal below 7 feet above grade over a public sidewalk or common driveway as accessible. Follow the guard mounting instructions, including the specified 1½-inch gap.
Maintain the location-dependent terminal clearances in tables 1 and 2 on pages 13–14. A qualified installer must use these instructions together with the appliance and terminal-kit manuals and applicable codes. The terminal instructions state that their listed clearances supersede the appliance instructions. Do not use a generic clearance or framing dimension for every wall finish.
Napoleon Silhouette Terminal installation manual W415-2899, revision A, October 7, 2020: application and certified appliances, pages 3–5; components and dimensions, pages 6–12; clearances, pages 13–14; finish-specific installation and guard, pages 15–27. Warranty terms, current availability and shipping specifications require separate confirmation.
Request a return within 30 calendar days after delivery for eligible new, unused, unassembled and uninstalled items in original packaging. Written authorization is required. Read the Returns Policy for conditions, fees and exclusions.
Most in-stock items are released for shipment within 1–2 business days after payment and order review. Carrier transit is additional. Parcel transit commonly takes 3–7 business days; freight commonly takes 5–10 business days after shipment. Special-order and backordered items may take longer. Shipping details, exclusions and damage reporting.
Required for brick finishes, or vinyl siding between 1 and 2 inches thick, when installing the matching Silhouette terminal. The SOST58B serves the 5 / 8-inch system with terminal ST58U-1. Select it by the approved appliance, terminal size and exterior finish—not by appearance alone.
| Manufacturer / MPN | Napoleon / SOST58B |
|---|---|
| Product type | Silhouette Brick Standoff Kit |
| Vent system | 5 / 8-inch direct vent |
| Terminal application | ST58U-1; horizontal termination only |
| Standoff depth | 4 inches |
Standoff assembly, eight W570-0022 screws and four W570-0004 screws. The fireplace, vent run and other installation components are separate.
Use only with the approved Wolf Steel direct-vent gas appliances and matching vent size listed in the manufacturer manual. The certified-appliance list is on page 4. Match the full appliance model and its installation instructions before selecting the route. This component is required only when the selected installation calls for it; it is not a mandatory addition to every fireplace.
For ST47U, finish material 1 inch or thinner, including vinyl, does not require an additional standoff. For ST58U-1, vinyl 1 inch or thinner requires SOST58; other finish material 1 inch or thinner does not require an additional standoff. Exterior finish between 1 and 2 inches uses the matching standard standoff. Brick or vinyl between 1 and 2 inches uses the matching brick standoff. Follow the finish-specific installation section.
Do not extend finish material beyond the terminal return flange. Keep all four air intakes and the exhaust port unobstructed. An accessible terminal requires the separately specified STS4758 terminal guard. The manual treats a terminal below 7 feet above grade over a public sidewalk or common driveway as accessible. Follow the guard mounting instructions, including the specified 1½-inch gap.
Maintain the location-dependent terminal clearances in tables 1 and 2 on pages 13–14. A qualified installer must use these instructions together with the appliance and terminal-kit manuals and applicable codes. The terminal instructions state that their listed clearances supersede the appliance instructions. Do not use a generic clearance or framing dimension for every wall finish.
Napoleon Silhouette Terminal installation manual W415-2899, revision A, October 7, 2020: application and certified appliances, pages 3–5; components and dimensions, pages 6–12; clearances, pages 13–14; finish-specific installation and guard, pages 15–27. Warranty terms, current availability and shipping specifications require separate confirmation.
