Wacker Neuson 5100038726 Inlet Duct Adapter

The Wacker Neuson is a genuine OEM Inlet Duct Adapter designed for the HI750, HI900, and HI1000 series indirect-fired air heaters. As a factory-sourced component, it matches the original part exactly — ensuring proper airflow alignment and a secure connection without modification. This adapter fits an extensive range of HI-series configurations, including diesel, gas, natural gas/LP, DGM, and skid-mounted variants across the HI750, HI900, and HI1000 model families. When your inlet duct adapter wears, cracks, or seals improperly, it compromises the heater's combustion air intake and overall heating performance — making fast, accurate replacement essential on any job.

Key Features

• Genuine OEM Airflow Geometry — Manufactured to Wacker Neuson's original duct profile specifications, ensuring the intake path is correctly shaped and sealed for efficient combustion air delivery.
• Drop-In Replacement — Engineered to the same mounting interface as the original, so installation aligns directly with existing duct connections on HI-series heater housings.
• Broad HI-Series Compatibility — Fits diesel, gas, natural gas/LP, DGM, surge-brake, and skid-mounted configurations across the HI750, HI900, and HI1000 model families.
• Protects Combustion Efficiency — A properly seated inlet adapter maintains the correct air-to-fuel ratio inside the heat exchanger; a damaged or ill-fitting adapter can cause incomplete combustion, heat loss, or heater lockout.
• Fuel-System Safety Compliance — As part of the combustion air intake path, using the correct OEM adapter helps maintain proper airflow separation from exhaust and supports safe indirect-fired operation in enclosed or occupied work environments.

The inlet duct adapter directs outside combustion air into the burner assembly of an indirect-fired air heater, keeping the air intake flow separate from the heated output air that enters the workspace. This separation is what makes indirect-fired heaters safe for use in enclosed environments — the combustion gases never mix with the conditioned air. When the adapter cracks, warps, or loses its seal, combustion air volume drops, burner performance suffers, and the heater may cycle off on safety lockout or fail to reach its rated output temperature.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.