The CH1 in Grayson’s Heating range provides reliable, targeted cabin heating using an all-electric PTC heat source, making it well suited to hybrid and battery-electric vehicle platforms.

Delivering up to 1.25 kW of heat, the unit supports staged heating to minimise inrush current while maintaining fast warm-up performance. A long-life brushless blower distributes warm air efficiently, while CAN control allows precise management of heat output and blower speed.

Its compact form factor enables discreet under-seat installation, helping OEMs add driver heat boost without redesigning the primary HVAC system. Self-regulating PTC technology prevents overheating, ensuring safe, consistent operation across demanding ambient conditions.

The CH1 includes a set of features that enable controlled performance and reliable operation.

• PTC Self-Regulating Heater: Prevents overheating and delivers consistent heat output.
• 1.25 kW Electric Heat Output: Provides effective driver heat boost in cold climates.
• CAN-Controlled Operation: Enables precise control of heating stages and blower speed.
• Two-Speed Brushless Blower: Ensures efficient airflow with long service life and low noise.
• Staged Heating Design: Reduces inrush current, supporting electrical system stability.
• Compact Under-Seat Installation: Allows easy integration without impacting cabin layout.
• Plug-and-Play Configuration: Simplifies installation and reduces integration time.
• Customisable Orientation Options: Supports OEM-specific packaging requirements.

This heating solution is defined by a set of technical features that shape its overall performance.

• Dimensions (L x W x D): 249.5 × 369 × 188.5 mm
• Weight: 4kg
• Maximum Heating Capacity: 1.25kW(PTC air heating)
• Voltage Range: 20 – 32V DC (Nominal 24V)
• Peak Current: 80A start-up / 50A operating
• Blower Airflow: Up to 300 m³/h
• Fan Control Speeds: 2
• Ambient Operating Range: - –25°C to +50°C
• Thermal Cut-Out Temperature: 86°C