--- title: "Evaporative Air Cooler 18 Series Bottom Air Discharge" url: https://tiercooling.com/posts/evaporative-air-cooler-18-series-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 18 with Bottom Air Outlet The entire Rundongfang permanent magnet evaporative air cooler range supports a customizable master-slave intelligent coordinated control system —..." categories: - "News" image: https://tiercooling.com/wp-content/uploads/2026/09/news-851.jpg word_count: 2152 --- # Evaporative Air Cooler 18 Series Bottom Air Discharge - [ Current location: Home ](https://rundongfang.com/) - ![RDF-180A-G](https://rundongfang.com/wp-content/uploads/RDF-180A-G-768x768.jpg) ![RDF-180A](https://rundongfang.com/wp-content/uploads/RDF-180A-768x768.jpg) ![RDF-180C](https://rundongfang.com/wp-content/uploads/RDF-180C-768x768.jpg) ![RDF-180B](https://rundongfang.com/wp-content/uploads/RDF-180B-768x768.jpg) ![pmssm-air-cooler-002](https://rundongfang.com/wp-content/uploads/pmssm-air-cooler-002-768x768.jpg) # Evaporative Air Cooler Series 18 with Bottom Air Outlet The entire Rundongfang permanent magnet evaporative air cooler range supports a customizable master-slave intelligent coordinated control system — a patented product independently developed in-house. Rundongfang provides customers with a 26,000 m³/h airflow permanent magnet evaporative air cooler. Eco-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 one. In addition to delivering fresh air and lowering temperatures for factory workshops, public places, and commercial entertainment venues, eco-friendly air conditioners have one key advantage — energy savings and environmental protection! This is a brand-new green product with no compressor, no Freon, and no copper tubing. Its key components — the evaporative cooling pad (a multi-layer corrugated fiber composite) and a 1.1 kW main motor — consume only 1/8 of the electricity used by traditional central air conditioners, delivering real energy savings across all industries. 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Through the master unit’s touchscreen, it enables single-unit control, zoned control, and full control. Communication between master and slave units uses the RS485 standard, and it supports external temperature and humidity sensors for intelligent temperature and humidity control, making it ideal for large factories, warehouses, and centralized control applications. ![](https://rundongfang.com/wp-content/uploads/rdf-tongfengjiangwen-2026-002.jpg) Fast power on/off: It takes 1 minute per unit to power on or off; powering 32 units on or off simultaneously saves 32 minutes. One-touch control of 32 units: Quickly adjust the master unit among ventilation, cooling, oxygen enrichment, and other operating modes—say goodbye to the era of controlling each unit individually. Easy troubleshooting: The intelligent cluster multi-unit control system features fault inspection indicators and automatic fault clearing functions, making faults easy to diagnose and improving repair efficiency. All-in-one multifunction: The intelligent cluster multi-unit control system integrates 12 functions into one, built with cutting-edge industry 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) | Dimensions (mm) | Air Outlet Size (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 high-density rare-earth permanent magnet inner rotor structure — never detaches and 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 structural design with IP64 protection rating. - Cools and ventilates a 100–150 m² workshop using only 1 kWh of electricity per hour. - Open-type hose water distribution tray system ensures even and smooth water flow. - Equipped with over/under-voltage, overcurrent, and phase-failure protection, plus automatic (manual) cleaning function. - Innovative speed control technology allows airflow to be adjusted to actual needs. Industry-exclusive fan reverse rotation provides exhaust capability, instantly switching from air supply to air extraction. - Three outlet configurations — top, bottom, and side discharge — can be installed to meet the needs of various engineering environments. - Made of eco-friendly engineering PP 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 the 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 cooling pad, where the air fully contacts the water and absorbs sensible heat from the air. This achieves cooling, ventilation, dust removal, and increased indoor oxygen content, making it especially suitable for high-temperature environments and crowded places. Main application areas: Industrial: Various factory workshops including automobile plants, hardware factories, electronics factories, machinery plants, electrical appliance factories, motorcycle plants, leather goods factories, garment factories, pharmaceutical plants, textile mills, shoe factories, plastics factories, and more. Commercial: Shopping malls, internet cafés, schools, bus stations, gyms, outdoor sports venues, restaurant kitchens, car washes, etc. Agricultural: Agricultural-specific models can be used in various greenhouses, flower farms, livestock breeding farms, and more. ![](https://rundongfang.com/wp-content/uploads/products-info-002.png) ### Low Investment, High Efficiency Compared with installing central air conditioning under the same conditions and area, the air conditioning equipment costs only a fraction of the total investment of central air conditioning. ![](https://rundongfang.com/wp-content/uploads/products-info-004.png) ### Low Power Consumption — Only 1 kWh per Hour Compared with central air conditioning installed in the same area, the eco-friendly equipment consumes only a fraction of the electricity. ![](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. It increases the oxygen content of the space and improves work efficiency, with the choice of natural airflow or targeted spot cooling. ![](https://rundongfang.com/wp-content/uploads/products-info-005.png) ### Powerful Cooling Effect In southern regions, the unit typically achieves a cooling effect of 4°C-10°C; in hot, dry regions, it can cool by 4°C-15°C, with rapid temperature reduction. ![](https://rundongfang.com/wp-content/uploads/products-info-007.png) ### Large Airflow, Long Air Delivery The large airflow ranges from 18000 to 60000 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, Reliable Quality Equipped with a 100mm-thick “5090 evaporative cooling pad” for strong cooling capacity, and featuring three-blade forward-swept axial fan blades for low noise and high efficiency. ![](https://rundongfang.com/wp-content/uploads/products-info-003.png) ### Humidity Regulation Provides humidity regulation for workplaces that require increased air humidity. Air Change Rate Reference for Various Applications 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 30–40 air changes per hour; Public places with dense crowds require an air change rate of 30–40 times/hour; Places or production workshops with dense crowds and high temperatures require 40–50 air changes per hour; High-temperature production workshops 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 method for the number of units depends on the required type of air outlet determined by site conditions; The selection of unit models and quantities offers flexibility based on site conditions; Number of units = Site volume × Air change rate ÷ Actual air supply volume of the unit; Spot cooling should be separately configured according to actual conditions, and the total air volume can be appropriately reduced; Indoor air supply ducts must match the model of the evaporative air cooler. Based on the actual installation environment and the required number of air outlets, design appropriate air supply ducts and outlets - Excellent cooling performance: Can rapidly lower the indoor temperature - Excellent ventilation performance: Effective ventilation and air supply, with high indoor oxygen content - Excellent odor removal: Can promptly eliminate and reduce unpleasant odors - Excellent air purification: Effectively purifies indoor air and dust - Excellent removal of harmful gases: Can rapidly reduce harmful substances indoors ![](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 superior cooling performance. Low air resistance: A multi-layer composite structure with special bonding angles minimizes air resistance, resulting in greater airflow and longer air delivery distance. Excellent antibacterial performance: Tested by authoritative institutions, it effectively inhibits bacterial growth and keeps the air fresh and natural. Algae growth prevention: Tested by professional institutions, it achieves Grade I anti-algae performance and effectively prevents algae growth. Healthy and eco-friendly: Compliant 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 institutions, 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 spatial cross-linking technology: sturdy texture, eco-friendly, pollution-free, easy to clean, free of pungent odors, non-toxic and harmless to the human body; multi-layer corrugated evaporative cooling pad with a heat exchange area nearly 100 times the surface area; pad thickness up to 100mm, providing a large contact area for higher evaporation efficiency and better cooling performance. Innovative frequency conversion control design 220V variable frequency speed control technology with soft start and smooth operation. Anti-drip streamlined grille design The grille features an eave-shaped anti-drip design that effectively prevents rainwater intrusion for safe use. Multi-stage anti-clog filter design The filter adopts a multi-stage anti-clog design with increased filtration area for greater efficiency and cleanliness. 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. Computational fluid dynamics design Large airflow, 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 Enhanced Purification System High-efficiency, eco-friendly, odorless cooling pad Polymer materials with cross-linking space technology — sturdy texture, non-toxic, harmless, and odor-free. Excellent filtration performance, large 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 filtering dust, particles, and more. Open-type hose water distribution tray system Brand-new water-spraying components with a unique water storage tank design for even water distribution and no clogging ever. Multi-function cleaning design Cleaning can be performed both at startup and shutdown for a more thorough clean. High-quality, durable water pump design Wide voltage, wide frequency, efficient, and wear-resistant high-quality pump with stable water pressure and low temperature rise. 24-hour continuous operation The pump uses a full copper-wire motor with low noise, low vibration, fast heat dissipation, stable temperature rise, long life, and fewer failures. Energy-free automatic water replenishment design Features an energy-free buoyancy automatic water replenishment system with ultra-low failure rate and high stability — tested for 100,000 operating cycles, and easier to maintain. ![](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 — UV-resistant, corrosion-resistant, anti-aging, and deformation-resistant. Innovative PVC cooling pad edging design More secure fixation, less likely to fall off; protects the pad surface from damage 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 a one-piece molded, tilted design with high strength and excellent cleaning performance. Ergonomic handle design on the base pan The handle position fits common hand shapes with a smooth contact surface — convenient and safe to carry. 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 worry-free, longer-lasting operation. The chassis bolts fixing the motor bracket use copper-embedded, one-piece injection-molded punched holes for a more secure connection — safer to use, more durable, and easier to maintain.