Driver comfort, safety and performance depend on stable cabin temperatures. The RA1 rooftop unit is engineered to deliver efficient cooling for driver cabins across on-highway and off-highway applications, even in challenging ambient conditions.

Available with either air-conditioning only or reversible heat pump technology, the RA1 offers flexible fresh-air and recirculation configurations to meet vehicle requirements. Its lightweight, low-profile housing integrates easily onto the vehicle roof and arrives pre-charged for true plug-and-play installation, removing the need for on-site refrigerant handling.

With electric-drive compressor options (24V DC or 600V DC), durable construction, and low lifecycle costs, the RA1 delivers dependable comfort for electric, hydrogen and ICE platforms. Constant cooling output, smart controller compatibility and minimal service requirements make it a trusted choice for OEMs seeking reliable, efficient driver HVAC.

Integrated features support long-term durability while enabling effective thermal performance and system compatibility.

• Constant Cooling Capacity, Independent of Vehicle RPM: Ensures stable, predictable climate control even during idling, low-speed operation, or stop–start cycles.
• Reversible Heat Pump Option for Efficient Heating: Provides high heating performance with lower energy consumption, extending range on electric and hybrid vehicles.
• Compact, Lightweight Rooftop Design: Minimises vehicle roof load and simplifies packaging, ideal for applications with limited available space.
• Delivered Pre-Charged for True Plug-and-Play Installation: Removes the need for on-site refrigerant handling or F-gas engineers, reducing installation time and cost.
• Fully Electric Operation (24V DC or 600V DC Compressor Options): Supports diesel, CNG, battery-electric and hydrogen fuel cell vehicles with no dependency on engine belt-drives.
• Fresh Air or Recirculation System Configurations: Allows OEMs to tailor airflow strategy to regional climate, air quality requirements, or application-specific needs.
• Leak-Proof Integrated Design (No Remote Hoses or Fittings): Reduces potential leak paths and improves reliability across long-life, high-vibration duty cycles.
• Optional Driver Dashboard HMI Control Panel: Gives operators intuitive temperature and mode selection while simplifying integration with vehicle controls.
• Low Operating and Lifecycle Costs: Brushless components, sealed refrigeration system, and efficient heat pump technology support long service life.
• Extended Warranty Options Available: Provides confidence for operators running vehicles in harsh climates or high-utilisation duty cycles.

Each technical element supports stable operation, helping ensure dependable performance in service.

• Cooling Capacity: Up to 3kW in 40°C ambient 24VDC
• Heat Pump Capacity (for Reversible Heat Pump Model): Up to 8kW in 0°C ambient (coefficient of performance up to 4)
• Refrigerant: R1234a
• Refrigerant charge: 1.5kg
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24V DC Air Conditioning model

• Dims (L x W x H): 1300 x 995 x 200 mm
• Weight: 55kg
  .

600VDC Air Conditioning model

• Dims (L x W x H): 1302 x 995 x 246 mm
• Weight: 55kg
  .

600VDC Heat Pump model

• Dims (L x W x H): 1302 x 995 x 246 mm
• Weight: 60kg

HP-4941-000 - 24VDC rooftop air conditioner - recirculation.    

3B-6673-0D02 – 600VDC rooftop air conditioner - recirculation.