York S1-029-21121-000 Inshot Burner

Reliable gas-to-air mixing is critical for maintaining high AFUE ratings in newer high-efficiency furnaces. The York S1-029-21121-000 Inshot Burner is a precision-engineered OEM furnace replacement part designed to direct fuel through the orifice with a venturi effect that pulls in primary air for optimal combustion. Built for durability in high-cycle environments, this single tube inshot burner minimizes byproducts like soot and carbon monoxide, ensuring the heat exchanger remains clean and efficient. Unlike older upshot designs, these units are specifically calibrated for induced draft systems, where the inducer fan provides the secondary air necessary to pull the flame directly into the heat exchanger tubes. When resolving issues with furnace burner replacement, using a genuine York heating system component ensures the flame pattern remains stable and doesn't lead to nuisance trips at the flame sensor. This part is a drop-in solution for maintaining factory specifications in York gas furnaces, providing the consistent ignition performance required by professional HVAC contractors.

• Efficient Fuel Combustion: Engineered for precise air-fuel ratios, maximizing thermal efficiency and reducing fuel waste.
• OEM Compatibility: A genuine York S1-029-21121-000 replacement ensures exact fitment in supported furnace manifolds.
• Reduced Maintenance: Minimizes soot buildup and CO emissions, extending the life of the heat exchanger and sensors.
• Standardized Implementation: Features a fixed-orifice design for consistent performance without the need for manual primary air adjustments.

How do I know if my inshot burner needs replacement?
Inspect the burner for heavy rust, cracks in the venturi tube, or clogged crossover ports. If multiple burners are not lighting simultaneously after ignition, the crossover ports may be degraded, which requires a replacement to prevent delayed ignition or "booming."

Can I use this burner with Propane (LP) gas?
While the burner tube itself is often compatible with both fuels, the gas orifice must be sized correctly for the specific BTU requirements of your furnace's fuel source. Always verify the orifice size and gas pressure at the manifold when installing.

Does this burner require a specific orientation?
Yes, inshot burners must be seated level on the gas manifold and aligned perfectly with the heat exchanger openings. Misalignment can cause flame rollout or improper heating of the flame sensor.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.