Suburban Furnace Rectangular Bottom Duct Gasket | 070853 | OEM

Ensure a clean seal on your Suburban SF furnace ducting with the Suburban Furnace Rectangular Bottom Duct Gasket (Part #070853). Genuine Suburban OEM replacement gasket for the rectangular bottom duct interface. Optional — Suburban no longer requires this gasket for SF furnaces, but included for buyers who want it for extra sealing peace of mind.

What This Does

Replacement gasket for the rectangular bottom duct interface on Suburban SF-series furnaces. Provides an airtight seal between the furnace body and the bottom duct kit — reduces air leakage that can affect heating efficiency.

⭐ Optional — Not Required by Suburban

Important buyer note: Suburban no longer requires this gasket for SF furnaces. Ordering is optional based on your installation preference. Common reasons buyers choose to install one anyway:

• Extra sealing insurance on older installations
• Replacement for a deteriorated original gasket
• Peace of mind for full-rebuild service work

Fits ALL Suburban SF Rectangular Bottom Ducts

Universal fitment across the Suburban SF platform's rectangular bottom duct interface.

Gasket-Only — Full Duct Kit Available

This listing is for the gasket only. If you need the full bottom duct kit (rectangular duct + metal inlay + gasket + manual), see the Suburban Furnace Bottom Duct Kit w/ Gasket (520576).

Cross-Reference Part Numbers

• Part Number: 070853

Genuine Suburban OEM

Key Features

• Genuine Suburban OEM rectangular bottom duct gasket
• Part number: 070853
• Fits ALL Suburban SF rectangular bottom ducts
• Optional — no longer required by Suburban
• Gasket-only — full duct kit (520576) available separately

Specifications

• Brand: Suburban
• Part Number: 070853
• Type: Rectangular Bottom Duct Gasket (Furnace)
• Compatible Furnaces: All Suburban SF furnaces with rectangular bottom ducts
• Requirement: Optional (no longer required by Suburban)
• Full Duct Kit Alternative: Suburban 520576 (includes gasket + duct + metal inlay + manual)