RV AC system won’t take up valuable living space or undercarriage storage space in the minibus. High-mounted installation allows for top-to-bottom air circulation, theoretically resulting in high efficiency.
In the RV industry, roof-mounted air conditioners have been a standard solution for many years, with mature products and readily available parts. Chinese manufacturers have rapidly risen to prominence by leveraging their domestic bus manufacturing advantages, with SONGZ and BUSCLIMA being typical examples.
RV AC systems are typically estimated based on the vehicle’s interior space volume, but at least a 30%-50% margin must be added for Southeast Asian environments. For 7-9 meter minibuses, a model with 15,000 BTU or higher is recommended. Higher EER means more cooling while consuming the same amount of electricity. This is crucial for off-grid scenarios relying on batteries. Choose a product with an EER > 10.
| Model | KK-30 | KK-50 | KK-100 | KK-120 | KK-140 | |
| Cooling Capacity | 3KW/10300BTU | 5KW/17166 | 10KW/34121 | 12Kw/42000BTU | 14KW/48000BTU | |
| Voltage | DC12V/24V | DC12V/24V | DC12V/24V | DC12V/24V | DC12V/24V | |
| Driven Type | Engine Driven | Engine Driven | Engine Driven | Engine Driven | Engine Driven | |
| Installation | Rooftop | Rooftop | Rooftop | Rooftop | Rooftop | |
| Condenser | Fan Qty | 1 | 2 | 2 | 2 | 2 |
| Air Flow Volume | 600m³/h | 680m³/h | 3800m³/h | 3200m³/h | 3800m³/h | |
| Evaporator | Blower Qty | 1 | 1 | 2 | 2 | 4 |
| Air Flow Volume | 750m³/h | 850m³/h | 2000m³/h | 2000m³/h | 2000m³/h | |
| Condenser Fan | Axial Flow | Axial Flow | Double axle and centrifugal flow | Double axle and centrifugal flow | Double axle and centrifugal flow | |
| Compressor | KC 5H14, 138cc/r | 5H14, 138cc/r | HL22, 212cc/r | Valeo TM21, 215 cc/r | HL32, 313cc/r | |
| Refrigerant | R134a, 0.8KG | R134a, 0.9KG | R134a | R134a | R134a | |
| Dimensions (mm) | 750*680*196mm | 755*745*190 | 1010*975*180 | 1660*1240*210 | 1520*1100*175 | |
| Application Vehicles | Rv Camper Motorhomes & Minibus | Rv Camper Motorhomes & Minibus | 6-6.5m minibus or caravans | 6-6.5m minibus or caravans | 6-6.5m minibus or caravans | |
The opening must be located above the roof joists (crossbeams), and a robust mounting frame must be constructed to distribute the air conditioner’s weight across the joists, rather than relying solely on the roof lining for support.
High-quality automotive-grade polyurethane sealant must be used. Employ a “sandwich” sealing method—a layer of sealant at the bottom of the mounting frame, a layer at the air conditioner base, and a final seal over the external seams. Ensure all screw holes and seams are completely covered by the sealant.
Use sufficiently high mounting pads to ensure a gap of at least 3-5 cm between the bottom of the air conditioner and the roof, creating an airflow channel—essential for heat dissipation.
Prioritize installation quality and waterproofing, and seek out manufacturers with extensive experience in minibus conversions. Generally, RV AC Systems are sourced from minibus and small bus conversion factories.
A reliable and quiet air conditioning system is the foundation of a comfortable life. Focus your budget and effort on system compatibility and installation quality.
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