Camper Ac and minibus air conditioning unit shares the need to provide stable cooling/heating capacity while the vehicle is in motion or parked. This is completely different from household air conditioners, which operate in a fixed location and need to withstand challenges such as vibration and shock.
Camper Ac save valuable interior space by utilizing unused areas on the roof, and the cool air circulates from top to bottom, resulting in high efficiency and good uniformity.
They consist of four main components: compressor, condenser, evaporator, and expansion valve. Due to the relatively large and less airtight cabin space compared to passenger cars, coupled with a larger number of passengers (minibuses) or heat generated by electrical appliances (RVs), a greater cooling capacity (BTU value) is required than in a similarly sized household space.
As a key piece of equipment for commercial operations (minibuses) or long-distance travel (RVs), the reliability of the air conditioning directly affects the core experience. Both require low failure rates and long service life.
Effective dehumidification is crucial for preventing window fogging and improving passenger comfort in humid weather or when there are many passengers.
Roof-mounted Camper Ac are most commonly found in minibuses. The evaporator unit is mounted on the roof and delivers air into the vehicle through ducts. Saves interior space and provides even cooling.
| 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 | |
BUSCLIMA engineers stated that if you are a vehicle owner or operator, you should pay attention to the following when purchasing or modifying an AC for Rv
Cooling Capacity Matching
Choose an air conditioner with sufficient cooling capacity (usually measured in BTU/hr or kW) based on vehicle size, passenger count (load capacity), and the climate of the operating region. For 12-15 seat minibuses in Southeast Asia, a cooling capacity of approximately 30,000-45,000 BTU/hr is typically required.
Installation Professionalism
1. Piping is well-sealed and leak-free.
2. Condensate drainage is smooth.
3. Electrical connections are secure and safe, with appropriate fuses.
4. Compressor bracket is sturdy, and belt tension is appropriate.
5. Ensure the vehicle’s alternator output and battery capacity can support the added air conditioning system; otherwise, it may lead to battery depletion or alternator overload damage. For Camper Ac parameters and data, please visit www.busclima.com or contact busclima@kingclima.com for more technical documents.

Camper Ac Common Problems and Maintenance Tips
1. Insufficient Cooling – Refrigerant leak (most common), condenser too dirty (clogged by dust and insects), compressor malfunction, expansion valve blockage.
2. No Cooling at All – Electrical circuit fault (fuse, relay, wiring), compressor clutch not working, complete refrigerant leak.
3. Abnormal Noise – Compressor bearing damage, loose or worn belt, fan motor malfunction.
4. Water Leakage – Evaporator drain pipe blockage or detachment.
Camper Ac Daily Maintenance Recommendations
1. Regular Cleaning – Frequently clean the condenser (exterior) and evaporator (interior) fins with compressed air or a water gun to maintain good heat dissipation.
2. Check Belts – Regularly check the compressor belt tension and wear.
3. Pay Attention to Abnormal Noise – If you hear any abnormal noise, check immediately to prevent small problems from becoming major malfunctions.
4. Professional Inspection – Before the peak season each year, have a professional technician conduct a comprehensive inspection, including checking refrigerant pressure and quantity, and inspecting the electrical circuits.
A powerful, reliable, durable, and easy-to-maintain air conditioning system is one of the core components of operation. When choosing one, don’t just pursue the lowest price; consider brand reputation, installation quality, after-sales service, and long-term operating costs. Investing in a good air conditioning system can significantly improve passenger satisfaction and reduce operational losses due to malfunctions.

