Wacker Neuson 5100049272 20in Duct Assembly, Inlet Box

The Wacker Neuson 20in Duct Assembly, Inlet Box is a genuine OEM component designed for the HI1000 and HI1000DGM indirect air heater series. As a factory-sourced part, it meets the exact dimensional and material standards of the original unit, ensuring a correct, trouble-free installation. This assembly is confirmed for multiple HI1000 and HI1000DGM configurations, so you can order with confidence knowing it matches your machine.

Key Features

• Correct Duct Geometry: — Manufactured to OEM dimensional tolerances, so the 20-inch inlet duct aligns precisely with the heater's airflow path without reworking mounting points.
• Genuine Wacker Neuson Part: — Sourced directly from Wacker Neuson, this assembly carries the same material grade and construction as the part it replaces, maintaining consistent airflow performance.
• Broad HI1000 Series Fitment: — Compatible with multiple HI1000 and HI1000DGM indirect air heater configurations, covering a range of serial number variants within the series.
• Sustained Combustion Air Supply: — A sound inlet box assembly keeps the combustion air intake sealed and properly directed; a cracked or deformed duct can starve the burner of clean air, causing inefficient combustion and heat output loss.
• Fuel System Integrity: — Because the inlet box governs the air entering the combustion chamber, using a correctly rated OEM duct assembly helps maintain safe air-to-fuel ratios during heater operation.

The inlet box duct assembly channels ambient air into the combustion section of an indirect fired air heater. It acts as the primary intake pathway, controlling the volume and direction of air that reaches the burner, which directly affects combustion efficiency and heat output. When the duct becomes cracked, collapsed, or improperly sealed, air ingestion is disrupted — leading to incomplete combustion, reduced heat delivery, and potential burner lockout.

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.