--- title: "Evaporative Air Cooler Series 23 Bottom Air Discharge" url: https://tiercooling.com/posts/evaporative-air-cooler-series-23-bottom-air-discharge/ date: 2025-12-22 modified: 2026-09-28 lang: en author: "info@tiercooling.com" description: "Current Location: Home Evaporative Air Cooler Series 23 with Bottom Air Outlet The full range of Rundongfang permanent magnet evaporative air coolers supports a customizable master-slave intelligent coordinated control system,..." categories: - "News" image: https://tiercooling.com/wp-content/uploads/2026/09/news-853.jpg word_count: 2155 --- # Evaporative Air Cooler Series 23 Bottom Air Discharge - [ Current Location: Home ](https://rundongfang.com/) - ![RDF-230B](https://rundongfang.com/wp-content/uploads/RDF-230B-768x768.jpg) ![RDF-230A](https://rundongfang.com/wp-content/uploads/RDF-230A-768x768.jpg) # Evaporative Air Cooler Series 23 with Bottom Air Outlet The full range of Rundongfang permanent magnet evaporative air coolers supports a customizable master-slave intelligent coordinated control system, a patented product independently developed in-house. Rundongfang provides customers with a 26000 airflow permanent magnet evaporative air cooler. Environmentally friendly air conditioners, also known as evaporative air coolers, water air conditioners, or water-cooled central air conditioners, are cooling and ventilation units that integrate cooling, ventilation, dust prevention, and odor removal. In addition to providing fresh air and lower temperatures for factory workshops, public places, and commercial entertainment venues, eco-friendly air conditioners have another key feature—energy saving and environmental protection! This is a brand-new green product with no compressor, no Freon, and no copper tubing. Its key components are the evaporative cooling pad (a multi-layer corrugated fiber composite) and a 1.1KW main motor, consuming only 1/8 of the electricity used by traditional central air conditioning, delivering truly substantial energy savings across all industries. 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Via the master unit’s touchscreen, it enables single-unit control, zone control, and full control. Communication between master and slave units adopts the RS485 standard, and it supports external temperature and humidity sensors for intelligent temperature and humidity control—ideal for large workshops, warehouses, centralized control, and similar applications. ![](https://rundongfang.com/wp-content/uploads/rdf-tongfengjiangwen-2026-002.jpg) Fast start-up and shutdown: Powering units on/off takes 1 minute per unit; switching 32 units on or off simultaneously saves 32 minutes. One-touch control of 32 units: Quickly switch the master unit between multiple operating modes such as ventilation, cooling, and oxygen enrichment—say goodbye to the era of single-unit control. Easy troubleshooting: The smart cluster multi-unit control system features fault inspection indicators and automatic clearing functions, making faults easy to diagnose and improving repair efficiency. All-in-one versatility: The smart cluster multi-unit control system integrates 12 major functions in one, built with industry-leading technology—safe, efficient, time-saving, and worry-free. ![](https://rundongfang.com/wp-content/uploads/rdf-tongfengjiangwen-jpg-2026-0007-1024x313.jpg) ![](https://rundongfang.com/wp-content/uploads/rdf-tongfengjiangwen-jpg-2026-0002.jpg) | Model | Voltage/Frequency (V/HZ) | Max Airflow (m3/h) | Rated Current (A) | Power (KW) | Overall Dimensions (mm) | Air Outlet Dimensions (mm) | Net Weight (KG) | Water Tank Capacity (L) | Controller Type | | ----- | ------------------------ | ------------------ | ----------------- | ---------- | ----------------------- | -------------------------- | --------------- | ----------------------- | --------------- | | RDF18A-11 | 380V/50HZ | 18000 | 2.8 | 1.1 | 1100*1100*1000 | 670*670 | 63 | 25 | LCD panel | | RDF18A-11S | 380V/50HZ | 18000 | 2.8 | 1.1 | 1100*1100*1000 | 670*670 | 63 | 25 | LED panel | | RDF18A/BT | 220V/50HZ | 18000 | 4.8 | 1.1 | 1100*1100*1000 | 670*670 | 63 | 25 | LCD panel | | RDF18B-11 | 380V/50HZ | 18000 | 2.8 | 1.1 | 1100*1100*1000 | 670*670 | 64 | 35 | LCD panel | | RDF18B-11S | 380V/50HZ | 18000 | 2.8 | 1.1 | 1100*1100*1000 | 670*670 | 64 | 35 | LED panel | | RDF18B/BT | 220V/50HZ | 18000 | 4.8 | 1.1 | 1100*1100*1000 | 670*670 | 64 | 35 | LCD panel | | RDF18C-11 | 380V/50HZ | 18000 | 2.8 | 1.1 | 1100*1100*1025 | 730*730 | 64 | 35 | LCD panel | | RDF18C-11S | 380V/50HZ | 18000 | 2.8 | 1.1 | 1100*1100*1025 | 730*730 | 64 | 35 | LED panel | | RDF18C/BT | 220V/50HZ | 18000 | 4.8 | 1.1 | 1100*1100*1025 | 730*730 | 64 | 35 | LCD panel | - Unique highly compact rare-earth permanent magnet inner rotor structure — never detaches, never demagnetizes. - Direct servo drive, brushless and quiet, maintenance-free, with no oil contamination. - Low power consumption, high power density, compact size, light weight, natural cooling, and low temperature rise. - Sealed structure design with IP64 protection rating. - Consumes only 1 kWh of electricity per hour for ventilation and cooling of a 100~150㎡ workshop. - Open-type hose water distribution tray system for even and smooth water spraying. - Equipped with overvoltage (undervoltage), overcurrent, and phase-failure protection, plus automatic (manual) cleaning function. - Innovative speed regulation technology allows air volume adjustment according to actual needs. Industry-exclusive fan reversal function enables switching from air supply to exhaust in an instant. - Three air outlet options — top, bottom, and side discharge — can be installed to meet the engineering needs of various environments. - Made of PP eco-friendly engineering plastic: anti-aging, UV-resistant, and long service life. ![](https://rundongfang.com/wp-content/uploads/rdf-tongfengjiangwen-jpg-2026-0011.jpg) ![](https://rundongfang.com/wp-content/uploads/rdf-tongfengjiangwen-jpg-2026-0008.jpg) The core cooling component of Rundongfang air conditioners is a high-efficiency evaporative cooling pad — a “natural multi-layer corrugated plant fiber composite.” Based on the natural physical principle that “water evaporation absorbs heat, and evaporation area affects evaporation efficiency,” the fan delivers air indoors while fresh outdoor air passes through the water-soaked pad, fully contacting the water and absorbing sensible heat from the air. This achieves cooling, ventilation, dust removal, and increased indoor oxygen content, making it especially suitable for high-temperature and crowded environments. Main application areas: Industrial: workshops of automobile plants, hardware plants, electronics plants, machinery plants, electrical appliance plants, motorcycle plants, leather goods factories, garment factories, pharmaceutical plants, textile mills, shoe factories, plastics plants, and more. Commercial: shopping malls, internet cafés, schools, bus stations, gyms, outdoor sports venues, restaurant kitchens, car washes, and more. Agricultural: agricultural-specific models can be used in various greenhouses, flower farms, livestock breeding farms, etc. ![](https://rundongfang.com/wp-content/uploads/products-info-002.png) ### Low Investment, High Efficiency Compared to installing central air conditioning under the same conditions and for the same area, the cost of this cooling equipment is only a fraction of the total investment required for central air conditioning. ![](https://rundongfang.com/wp-content/uploads/products-info-004.png) ### Low Power Consumption, Only 1 kWh per Hour When installed for the same area, the power consumption of this eco-friendly cooling equipment is only a fraction of that of central air conditioning. ![](https://rundongfang.com/wp-content/uploads/products-info-006.png) ### Excellent Air Quality “Rundongfang” integrates ventilation, air exchange, dust removal, and cooling in one unit, increasing the oxygen content in the space and improving work efficiency. You can choose between natural air supply or spot cooling as desired. ![](https://rundongfang.com/wp-content/uploads/products-info-005.png) ### Powerful Cooling Effect In southern regions, the unit generally achieves a cooling effect of 4°C–10°C; in hot and dry regions, it can achieve a cooling effect of 4°C–15°C, with rapid cooling. ![](https://rundongfang.com/wp-content/uploads/products-info-007.png) ### Large Airflow, Long Air Delivery Distance Airflow ranges from 18,000 to 60,000 cubic meters per hour and can be selected according to customer requirements. Our units deliver high air pressure and long-distance air supply. ![](https://rundongfang.com/wp-content/uploads/products-info-008.png) ### Stable Performance and Reliable Quality Equipped with a 100mm-thick “5090 evaporative cooling pad” for strong cooling capacity, and a three-blade forward-swept axial fan for low noise and high efficiency. ![](https://rundongfang.com/wp-content/uploads/products-info-003.png) ### Humidity Control Regulates humidity in workplaces where increased air moisture is required. Air change rate reference for various settings Definition of air change rate: Air change rate (times/hour) = Total indoor air supply volume (m3/h) ÷ [Indoor area (㎡) × Indoor height (m)]; General environments require an air change rate of 30–40 times/hour; Crowded public places require an air change rate of 30–40 times/hour; Crowded, high-temperature locations or production workshops require an air change rate of 40–50 times/hour; High-temperature workshops or those with severe pollution require an air change rate of 50–60 times/hour; In the more humid southern regions, the air change rate should be appropriately increased, while in the hotter northern regions it can be appropriately reduced. The calculation of the number of units depends on the type of air outlet determined by site requirements; Model selection and quantity can be flexibly configured based on site conditions; Number of units required = Venue volume × Air change rate ÷ Actual air supply volume per unit; Spot cooling should be configured separately according to actual conditions, and the total air volume can be appropriately reduced; Indoor air supply ducts must match the air cooler model. Based on the actual installation environment and the required number of air outlets, design suitable air supply ducts and outlets. - Excellent cooling effect: rapidly lowers indoor temperature - Excellent ventilation effect: effective air exchange and supply, with high indoor oxygen content - Excellent odor removal: promptly eliminates and reduces unpleasant odors - Excellent air purification: effectively removes airborne dust indoors - Effective removal of harmful gases: quickly reduces indoor harmful substances ![](https://rundongfang.com/wp-content/uploads/products-info-009.png) ![](https://rundongfang.com/wp-content/uploads/rdf-tongfengjiangwen-jpg-2026-0009.jpg) High evaporation efficiency: The heat exchange area is approximately 100 times the surface area, with excellent water absorption and an evaporation efficiency of over 80%, delivering outstanding cooling performance. Low air resistance: Featuring a multi-layer composite structure, its special bonding angle minimizes air resistance, resulting in high airflow and long-distance air delivery. Excellent antibacterial performance: Tested by authoritative departments, it effectively inhibits bacterial growth and keeps the air fresh and natural. Algae growth prevention: Tested by professional departments, it achieves Grade I anti-algae performance and effectively prevents algae growth. Healthy and eco-friendly: Complies with RoHS and Reach environmental standards, free of toxic substances that may cause allergies, non-toxic and odorless. Durable and long-lasting: Tested by authoritative departments, it is corrosion-resistant, easy to clean, and has a long service life. ![](https://rundongfang.com/wp-content/uploads/products-info-011.png) #### 6T Operating System High-efficiency thickened cooling pad design Polymer materials with space cross-linking technology offer a solid texture, eco-friendliness, no pollution, easy cleaning, no pungent odor, and are non-toxic and harmless to the human body; multi-layer corrugated evaporative cooling pads provide a heat exchange area nearly 100 times the surface area; with a pad thickness of 100mm, the contact area is large, delivering higher evaporation efficiency and better cooling performance. Innovative frequency conversion control design 220V variable frequency speed control technology with soft start and stable operation. Splash-proof streamlined grille design The grille features an eave-shaped splash-proof design that effectively prevents rainwater ingress for safe use. Multi-layer anti-clogging filter design The filter adopts a multi-layer anti-clogging design with increased filtration area, making it more efficient and cleaner. Low-failure, high-humidity-resistant motor High efficiency, low noise, and longer service life; cast iron housing with good heat dissipation and low energy consumption; Low-failure, high-humidity-resistant, corrosion-resistant all-copper core motor for stable operation. Simulation-based fluid dynamics design Large air volume, higher air pressure, lower operating noise, and low energy consumption; Air duct design based on simulated airflow fields greatly reduces air resistance and noise. ![](https://rundongfang.com/wp-content/uploads/products-info-013.png) #### 6P Advanced Purification System High-efficiency eco-friendly odorless cooling pad Polymer materials with space cross-linking technology offer a solid texture, non-toxic, harmless, and odorless. Excellent filtration performance, high evaporation capacity, great cooling effect, and easy to clean. High-efficiency multi-layer anti-clogging filter design Multi-layer anti-clogging filter design with multiple filtration stages effectively filters dust, particles, and more. Open-type hose water distribution system Brand-new water spraying components with a unique water storage trough design ensure even water distribution and never clog. Multi-function cleaning design Cleaning functions are available in both power-on and power-off states for more thorough cleaning. High-quality durable water pump design Wide voltage, wide frequency, high efficiency, and wear-resistant high-quality pump with stable water pressure and low temperature rise. Capable of 24-hour continuous operation The pump uses an all-copper wire motor with low noise, low vibration, fast heat dissipation, stable temperature rise, long life, and few failures. Energy-free automatic water replenishment design Adopts an energy-free buoyancy-based automatic water replenishment system with ultra-low failure rate and high stability, rated for 100,000 operations, and easier maintenance. ![](https://rundongfang.com/wp-content/uploads/products-info-012.png) #### 6D Three-Dimensional Protection System High-Strength Weather-Resistant Casing Design The body is made of weather-resistant polymer with UV resistance, corrosion resistance, anti-aging and anti-deformation properties. Innovative PVC Cooling Pad Edge-Sealing Design More reliable fixing that resists falling off; does not easily damage the cooling pad surface, with no risk of water leakage. High-Strength Column Design The unit features a high-strength column design with a solid structure, high strength and strong load-bearing capacity. One-Piece Molded Chassis Design Adopts an integral molded, inclined design with high strength and excellent cleaning performance. Ergonomic Handle Design on the Bottom Basin The handle position fits common hand shapes, with a smooth contact surface for convenient and safe handling. Sturdy and Durable Motor Bracket Design The motor bracket is made of sturdy, durable cast iron with strong torsion resistance, producing no resonance noise for safer, longer-lasting operation. The bolt holes fixing the motor bracket to the chassis use a copper-inlaid integral injection-molding design for a more secure connection, safer and more durable use, and easier maintenance.