The DM3 in Grayson’s Cabin HVAC range provides effective windscreen demist and enhanced driver comfort by integrating both heat and air conditioning in a single compact unit.

Engine coolant supplies up to 18kW of heating through a lightweight aluminium heater coil, while an integrated evaporator and refrigerant connection ports deliver up to 4kW of cooling for warm-weather operation.

A long-life brushless twin-scroll blower ensures smooth, consistent airflow to the windscreen, driver, or both. Built with a robust aluminium frame and equipped with debris and air filtration systems, the DM3 maintains performance by preventing dust or blockages in demanding environments. Suitable for a wide range of heavy-duty vehicles, it offers a versatile comfort and safety solution for ICE-based platforms.

These features are designed to work collectively to support efficient, stable, and well-balanced product performance.

• Integrated Heating and Cooling: Provides year-round driver comfort and clear visibility across hot and cold climates.
• Aluminium Heater Coil + Evaporator: Efficient heat transfer and cooling performance within a compact, durable assembly.
• Twin-Scroll Brushless Blower: Delivers smooth, reliable airflow with extended service life and low maintenance.
• Refrigerant Connection Ports: Enables straightforward integration of AC circuits into existing vehicle HVAC systems.
• Debris Collection Filter Tray: Protects internal components by preventing blockage and maintaining stable airflow.
• Air Filter System: Reduces dust build-up on coils and blowers, improving long-term thermal and airflow performance.
• Compact Aluminium Frame: Lightweight yet durable, suitable for tight cabin packaging or retrofit installations.
• Supports Demist and Driver Comfort Boost: Directs airflow where it’s needed most for visibility and comfort.

These technical capabilities form the basis of the product’s design and operation.

• Dimensions (L x W x D): 525 x 440 x 216 mm
• Weight: 14.2kg
• Maximum Heating Capacity: 12kW (at *0°C air, 80°C coolant)
• Cooling Capacity: 4kW
• Blower: Twin-scroll, 1-speed, brushless
• Orientation: Right-hand pipes
• Ambient Operating Range: TBC
• Coolant Requirements: Min. flow 12 l/min;
  Min. temp 35°C;
  Max pressure 1.5bar
• Construction: Aluminium frame with debris and air filtration