Rv Roof Air Conditioner is a mainstream and efficient solution for converting minibuses into motorhomes. While minibuses may have a larger electrical system capacity than vans, their air conditioning load is also greater. The conversion space and roof strength of minibus motorhomes are generally better suited for roof-mounted air conditioners than those of minivans.
RV Roof Air Conditioner Selection Guidelines
Primary Consideration: Cooling Capacity Matches Space
The internal cubic volume of the minibus is crucial. Air conditioning cooling capacity is expressed in British Thermal Units per Hour (BTU/h) or Watts (W).
1. Simple Estimation Formula: Required Cooling Capacity (BTU/h) ≈ Vehicle Interior Space (cubic meters) × Coefficient
Coefficient Range: 350-400 for good insulation; 400-450 for average insulation; 450-500 for poor insulation or in extremely hot regions.
2. Example: A minibus with an interior space of approximately 10 cubic meters, with good insulation, requires a cooling capacity of approximately 10 × 380 = 3800 BTU/h.
3. Common Roof Air Conditioner Specifications:
9000-10000 BTU/h: Suitable for most small to medium-sized minibuses and campervans (internal length 4-5 meters).
13500-15000 BTU/h: Suitable for larger minibuses or minibuses with longer interior spaces.
4. Recommendation: Larger is better. If your budget and power allow, choose a slightly larger model. It can reach the set temperature in a shorter time and then operate at a lower power or frequency, which may be more energy-efficient and provide a more comfortable ride.
Special Considerations for Installing an RV Roof Air Conditioner in a Minibus
1. Roof Structure and Reinforcement: Minibus roofs are usually “dome” or flat surfaces with reinforcing ribs. Before installation, ensure the installation point has sufficient support.
Internal reinforcement is mandatory! 1. After drilling an opening (approximately 40x40cm) in the roof, a reinforced frame made of aluminum alloy profiles or steel structure must be constructed inside the vehicle’s ceiling to distribute the weight of the Camper Ac onto the vehicle’s frame, preventing the roof sheet from sagging, deforming, or producing abnormal noises.
2. The electrical system is fundamental (crucial!): Even inverter air conditioners are power-hungry machines. A powerful electrical system is essential.
Recommended minimum configuration:
Battery: At least 10 kWh (e.g., a 48V 200Ah system, or a 24V 400Ah system).
Inverter: A pure sine wave inverter with a continuous power output of 3000W or higher.
Charging: A high-power car charger (in conjunction with the original alternator) + an 800W or higher solar panel.
Before installation, be sure to accurately calculate your power needs based on the maximum and average power consumption of your chosen air conditioner model.
3. RV Roof Air Conditioner – Installation Process
Waterproofing: Special waterproof sealant and waterproof gaskets must be used at all openings, and a water spray test must be conducted.
Pipelining and Interior: Refrigerant pipes, drain pipes, and electrical wires must be properly arranged and insulated. The interior unit cover must blend seamlessly with the ceiling, ensuring an aesthetically pleasing and airtight design.
Access Door: Ensure the cover has an accessible access door for easy cleaning of the filter.
While an RV Roof Air Conditioner permanently increases vehicle height (approximately 25-35 cm), its efficiency, reliability, and space-saving advantages make it a timeless classic choice for minibuses primarily used for travel and camping. With proper planning and budget allocation beforehand, you can enjoy a comfortable and cool RV lifestyle.
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