RAPA - Radial Unit Heater
The RAPA series is a high-capacity radial unit heater engineered for large, high-ceiling industrial and commercial spaces requiring powerful, precisely directed hot air distribution. Manufactured from high-quality, corrosion-resistant galvanized steel with a directly coupled backward-curved radial fan and a copper-tube, aluminum-finned heating serpentine, the RAPA delivers heating capacities from 5,000 to 60,000 kcal/h — making it the ideal high-output hot water or steam heating solution for warehouses, hangars, sports halls, and production facilities with ceiling heights exceeding 4 meters.
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Areas of Use
The RAPA series is the high-output counterpart to the AAPA axial unit heater, delivering significantly greater heating capacity through its powerful radial fan — making it the preferred choice for the largest industrial spaces where maximum heat output and long heat throw distance are critical requirements. Use these high-performance radial unit heaters confidently in:
- Large industrial warehouses, logistics centers, and distribution facilities
- Aviation hangars, large vehicle workshops, and heavy maintenance facilities
- Sports arenas, indoor stadiums, and large recreation centers
- High-output manufacturing plants and heavy industrial production facilities
- Large commercial garages, showrooms, and event spaces with very high ceilings
Key Features & Specifications
Massive Heating Capacity — 5,000 to 60,000 kcal/h: The RAPA series delivers a heating capacity range of 5,000 to 60,000 kcal/h — significantly greater than the axial AAPA series — making it the definitive choice for the largest industrial and commercial spaces requiring maximum thermal output from a single ceiling-mounted unit.
Backward-Curved Radial Fan for High-Pressure Airflow: Powered by a directly coupled backward-curved radial fan, the RAPA generates higher static pressure and more focused, directional airflow than an equivalent axial unit — delivering superior heat penetration over very long distances in large, open-plan industrial spaces and ensuring uniform floor-level temperatures throughout.
Copper-Tube Aluminum-Finned Heating Serpentine: The heating coil is manufactured with copper tubes and aluminum fins — a high-thermal-efficiency design that provides excellent heat transfer performance, corrosion resistance, and long service life under continuous industrial heating operation.
Standard 90°C/70°C Hot Water Operation: Manufactured as standard for 90°C/70°C hot water working regime, ensuring direct compatibility with the most common industrial and commercial heating plant specifications without any system modifications or interface equipment.
Steam Operation Available on Request: For facilities with steam distribution infrastructure, the RAPA series can be manufactured for steam operation upon request — ensuring complete compatibility with the full range of industrial heating plant configurations across all sectors.
Heavy-Duty Galvanized Steel Construction: The robust body is manufactured from high-quality, corrosion-resistant galvanized steel, providing exceptional structural integrity and long-lasting durability in the most demanding industrial environments — including facilities with high humidity, dust, and chemical exposure.
Optimized for Ceiling Heights Exceeding 4 Meters: Like all unit heaters, the RAPA is specifically sized and configured for spaces where ceiling heights exceed 4 meters. Its powerful radial fan prevents heat stratification, ensuring warm air is effectively delivered to the occupied zone at floor level throughout the entire heated space.
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