Coyote 2″ Defrost Plenum (03-1838-1)

Description

Overview

The Coyote 03-1838-1 2-inch Defrost Plenum improves windshield defrost performance in compact HVAC systems.
It takes warm or cool air from the main duct and sends it to both sides of the glass for clear visibility.
Because it spreads air evenly, frost and fog clear faster and stay away longer.

This 2″ plenum connects directly to the HVAC hose.
Air flows through its main chamber and exits smoothly through two balanced outlets.
As a result, airflow stays steady and quiet even when the fan runs at high speed.
In addition, the smooth inside walls reduce turbulence and improve system efficiency.

Coyote builds the 03-1838-1 from tough black ABS plastic, so it can handle vibration, heat, and daily use.
The one-piece design means there are no seams to crack or leak.
Because of its small size, it fits neatly behind dashboards, control panels, or bulkheads.

Installation is quick and easy.
Simply connect the 2-inch hose to the inlet and align the outlets with the defrost vents.
Secure it using clamps or mounting tabs for a tight, rattle-free fit.
Once installed, the plenum delivers clean, reliable airflow season after season.

This compact design works well in buses, trucks, off-road machines, and other heavy-duty HVAC systems.
It is ideal for any setup that uses 2-inch ducting and needs strong, even airflow to defrost or defog the windshield.

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Function and Performance

This 2-inch defrost plenum connects directly to the HVAC outlet or flexible duct.
Air enters through the single 2″ inlet and exits through two evenly balanced ports aimed toward the windshield.
The smooth internal flow path reduces turbulence and noise while ensuring fast, uniform glass clearing.
As a result, it helps operators maintain safe visibility even in humid or cold conditions.

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Durability and Design

Coyote molds the 03-1838-1 plenum from impact-resistant black ABS plastic that stands up to vibration, heat, and UV exposure.
Because the material retains its shape under temperature swings, it performs reliably in demanding off-road and industrial environments.
The one-piece molded body eliminates seams and weak points for long-term use.

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Installation

Installation is quick and straightforward.
Attach the 2″ inlet to the flexible HVAC hose and align the dual outlets with the defrost vent openings.
The compact profile fits easily behind instrument panels or in cab headliners.
Technicians can secure it with brackets, adhesive, or clamps to ensure a tight, rattle-free fit.

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Applications

The Coyote 03-1838-1 2″ Defrost Plenum is used in buses, trucks, RVs, construction and ag equipment, and specialty vehicles.
It’s ideal for systems that require controlled, even airflow to defrost windshields or cab windows efficiently.

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Specifications

• Series: Air Distribution Components

• Part Number: 03-1838-1

• Inlet Size: 2″ (50.8 mm)

• Outlet Type: Dual defrost ports

• Material: Black ABS plastic

• Function: Distributes HVAC airflow to defrost vents

• Applications: Bus, RV, truck, off-road, and industrial HVAC

• Features: Compact dual-outlet design, smooth airflow, durable ABS construction, easy installation