180231 Suburban Bruner Orifice NT-20S/SE NT-20SQ/SEQ #3/64 ORFICE 3/64 NT-20S

Compatibility: Suburban Furnace NT12LEC/ NT16LEC/ NT20LEC/ NT20S/ NT16LE/ NT16S/ NT20L/ NT20SE/ NT20SQ/ NT20SEQ

OEM 3/64" LP Gas Orifice for NT‑20 and LEC/L‑Series Furnaces

The Suburban 180231 Burner Orifice meters the precise LP gas flow into the burner tube on NT‑20‑series furnaces. Sized at 3/64", this orifice is calibrated for the BTU output of the NT‑20 platform, ensuring proper ignition, stable flame shape, and clean combustion. Using the correct orifice is essential for maintaining furnace efficiency and preventing soot, yellow flames, or ignition failures.

This model also fits several LEC and L‑series Suburban furnaces that share the NT‑20 burner assembly architecture.

Key Features

• OEM Suburban 3/64" burner orifice

• Provides correct gas flow for NT‑20 and compatible LEC/L‑series furnaces

• 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

NT‑Series Furnaces:

• NT‑20S

• NT‑20SE

• NT‑20SQ

• NT‑20SEQ

LEC / L‑Series Furnaces:

• NT‑12LEC

• NT‑16LEC

• NT‑20LEC

• NT‑16LE

• NT‑20L

This is the correct OEM 3/64" orifice for all models listed above.