180188 Suburban Bruner Orifice #55

SF-20 20F 

The Suburban 180188 Burner Orifice meters the precise LP gas flow into the burner tube on SF‑20‑series furnaces. Sized at #55, this orifice is calibrated for the BTU output of the 20k BTU Suburban furnace class, ensuring proper ignition, stable flame shape, and clean combustion. Using the correct orifice is essential for maintaining furnace efficiency and preventing yellow flames, soot buildup, or ignition failures.

This is the OEM replacement for both the standard SF‑20 and the F‑suffix SF‑20F models.

Key Features

• OEM Suburban #55 burner orifice

• Provides correct gas flow for 20k BTU furnace platforms

• Ensures proper flame shape, ignition reliability, and combustion stability

• Brass construction for clean, consistent metering

• Direct‑fit replacement for factory burner assemblies

When Technicians Replace This Orifice

• Yellow, lazy, or unstable flame

• Soot buildup in burner or exhaust

• Furnace failing to ignite or lighting inconsistently

• Incorrect BTU output or weak heating

• Orifice clogged with debris, oil, or contamination

Compatibility

• SF‑20

• SF‑20F

• Fits OEM Suburban burner assemblies requiring a #55 orifice