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DEFU delivers high-efficiency rooftop, backpack, and split air conditioners, diesel heaters, and refrigeration units for trucks, RVs, buses, and commercial vehicles — engineered for durability, comfort, and performance.
A leading manufacturer of automotive electric air conditioning systems based in Shandong Province, China, Dezhou Sino Air Conditioner Equipment Co., Ltd. (DEFU) covers over 80 acres with more than 35,000 square meters of advanced manufacturing space.
Equipped with Swiss CNC machining, Japanese turning-milling composite processing, German CNC grinders, and Japanese three-coordinate measuring machines, DEFU treats quality as its top priority.
We have established advanced automotive electric air conditioning system environment simulation laboratories to ensure every product performs reliably under extreme conditions.
One-stop air equipment and spare parts for trucks, RVs, buses, and commercial vehicles
12V/24V Smart Rooftop Air Conditioner with Bluetooth/WiFi
24V/12V Durable Rooftop Air Conditioner
12V/24V Dual-Rotor Split System
24V/12V Backpack Parking Air Conditioner
48V/60V/72V/96V High-Voltage Unit
Portable & Efficient Heating Solution
12V/24V/48V for Cargo Vans
12V/24V/48V–72V for Vehicle AC
Custom designs, branding, and technical support for global partners.
Products meet international standards for safety, efficiency, and durability.
Smart control systems optimize power usage and reduce operational costs.
Built to withstand extreme temperatures, vibrations, and dusty environments.
DEFU rooftop parking air conditioners serve trucks and RVs with three series: smart SR (Bluetooth/WiFi), durable DR, and value R models. Key differences include voltage (12V/24V/48V/72V), cooling capacity (7,000–12,000 BTU), and features. Choose SR7 for premium trucks, DR6 for harsh conditions, or R5 for budget needs. All units feature rugged designs, global certifications, and OEM support.
Defu's guide explores evaporators — the core component of rooftop AC units for trucks & RVs. Compare plate-fin, tube-fin, and microchannel types, aluminum vs. copper materials, and maintenance tips for optimal cooling in your rooftop camper AC. Learn how to choose the most efficient evaporator for rooftop air conditioning units.
Defu's DC rooftop AC units are engineered for Latin America's challenging climates and electrical systems. With flexible voltage support (12V–96V), corrosion-resistant materials, and efficient cooling, our units are ideal for long-haul truckers and RV travelers across the region.
Our rooftop and backpack AC units are designed for trucks, RVs, buses, construction machinery, and specialty vehicles. Voltage options (12V, 24V, 48V, up to 96V) ensure compatibility with diesel, electric, and hybrid systems.
Yes, DEFU provides full OEM and ODM support, including custom branding, design modifications, and technical integration for large-scale fleet operators and vehicle manufacturers.
Yes, our products meet CE, ISO, and other international standards. We support global compliance requirements for North America, Europe, Latin America, and Asia-Pacific regions.
Each unit comes with detailed installation manuals and mounting kits. We also offer technical support via email and video guidance. For complex integrations, our engineering team can assist remotely.
Welcome to send your inquiry for the required products. We look forward to your good news!
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