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Water-Cooled Indoor Cultivation HVAC Equipment

Stable, Energy-efficient, Precise Climate Control Solution

Built for Commercial Grow Operations

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What is Water-Cooled Grow Room HVAC System

A water-cooled grow room hvac system is a climate control solution designed specifically for grow rooms. Instead of using standard air-cooled condensers, it utilizes water as the heat transfer medium to regulate temperature and humidity efficiently. This system typically relies on water chillers or dry coolers to provide cooling capacity, circulating chilled water to maintain optimal growing conditions without requiring outdoor condenser units.

Pros of Water-Cooled Indoor Cultivation HVAC Equipment

Quieter Operation, Less Noise Pollution

Air-cooled systems rely on fans and compressors to dissipate heat and can be noisy in operation, especially for grow rooms or grow facilities in urban areas where noise pollution may occur. Water-cooled HVACs are cooled primarily by water and run more quietly without large fans.

Higher Energy Efficiency & Lower Operational Costs

Water is more efficient at transferring heat than air, meaning that water-cooled systems can transfer heat faster and more efficiently, thereby using less energy for the same cooling demand. This characteristic makes water-cooled HVAC more energy efficient especially for large grow rooms, and can effectively reduce long-term operating power costs.

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More Stable Performance in Extreme Climates

The cooling efficiency of the air-cooled system is largely affected by the ambient temperature.

  • In a high temperature environment, the heat transfer efficiency of the air-cooled condenser will be reduced, resulting in a lower cooling capacity and a heavier operating load on the system.
  • In extremely cold environments, air-cooled systems may suffer from frost or low condensing pressure, which may affect performance.
  • Water-cooled systems are able to operate stably in both hot summers and cold winters due to their primary reliance on water cooling, which is unaffected by outside air temperatures.

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    Ideal Applications

    In modern growing and production environments, precise control of temperature, humidity and air quality is a core element in ensuring healthy plant growth and high productivity. However, not all spaces are suitable for a universal environmental control solution. Different site conditions, climatic characteristics and growing needs often require more suitable indoor cultivation hvac equipment to achieve stable operation. Water-cooled Grow Room HVAC systems have become the ideal solution for many scenarios due to their unique cooling mechanism and high performance.

  • Cultivation Environments Requiring Precise Climate Control
  • Areas with Accessible Water Resources
  • Facilities Prioritizing Energy Efficiency
  • Extreme Climate Areas (High Temperature or Freezing Conditions)
  • Urban Grow Facilities with Noise Restrictions
  • Key Functions

    Water-cooled indoor cultivation hvac equipment utilizes highly efficient water-cooled circulation technology to provide more precise and consistent climate control. Altaqua GWS Series Grow Room HVAC System delivers precise dehumidifying, heating, and cooling for optimal grow room conditions. Optional features like WiFi control further enhance efficiency and customization.

    General Functions:

  • Dehumidifying
  • Air cooling
  • Air heating
  • Air Ventilation
  • Optional Functions:

  • WiFi Remote Control
  • CO2 Level Control
  • Fresh Air Ventilation
  • Air Sterilization
  • GWS Series Grow Room HVAC System Capacity

    Altaqua GWS Series Grow Room HVAC System is an advanced water-cooled climate control solution designed to meet the rigorous demands of commercial grow rooms. It utilizes water as the heat transfer medium, reducing reliance on refrigerants while ensuring consistent temperature and humidity regulation.

    GWS-20D

    Air Handling: 5,190 to 5,600 CFM

    Refrigeration Capacity: 19.3 Tons

    Moisture Removal: 11.1 Gallon/hr

    GWS-30D

    Air Handling: 7,860 to 8,490 CFM

    Refrigeration Capacity: 28.9 Tons

    Moisture Removal: 16.5 Gallon/hr

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    Competitive Advantages 

    All-in-one Climate Control

    Unlike traditional systems that rely on air conditioners with dehumidification as a secondary feature, our system prioritizes humidity control. During the day, it dehumidifies efficiently while keeping temperature at the desired level. At night, when plants continue transpiring but cooling demand decreases due to the absence of grow lights, the system operates in dehumidification mode with air conditioning, ensuring stable target temperature and humidity levels.

    Using Dew Point for More Precise Humidity Control

    In traditional relative humidity (RH) control modes, humidity regulation relies on air temperature fluctuations. For example, when air temperature drops, the relative humidity rises even if moisture content remains constant, which may lead to misleading humidity measurements and compromise control accuracy. In contrast, dew point control is more scientifically robust, as it directly measures the actual moisture content in the air, unaffected by temperature variations. This enables growers to precisely manage Vapor Pressure Deficit (VPD), promoting better water and nutrient uptake in plants, thereby improving yield and quality.

    Accurate Control from Integrated Electronics

    The use of Austria-based E+E brand humidity and temperature sensors allows real-time monitoring of water vapor content in the air, maintaining a fluctuation range of ±2.5% RH relative to target values for precise humidity adjustments. E+E sensors also deliver exceptional stability and reliability, sustaining measurement accuracy within ±0.5 °F during long-term operation. Even in environments with significant humidity fluctuations, these sensors ensure data accuracy and provide stable system performance.

    Multi-System Redundancy Design

    In commercial cultivation facilities, HVAC system failures can lead to severe losses. Thus, multi-system redundancy design is a critical feature for HVAC systems in commercial grow rooms. Redundancy ensures that backup systems immediately take over if the primary system fails, preventing environmental fluctuations caused by equipment downtime. This design significantly reduces potential losses from malfunctions and safeguards continuous healthy crop growth. Additionally, modular redundancy simplifies system maintenance and upgrades, enabling flexible adjustments during expansions or optimizations without disrupting normal operations.

    WiFi Control Provides Easy Access & Management

    WiFi connectivity enables 24/7 real-time internet-based monitoring and adjustments. The system is typically equipped with real-time alert functionality, sending immediate notifications to managers when abnormal temperature or humidity fluctuations occur, ensuring prompt issue resolution. These features allow growers to maintain stable environmental conditions effortlessly while minimizing crop losses due to equipment failures or environmental anomalies.

    Reliable EC Fan Motors Reduce Energy Costs

    Ebm-papst’s GreenTech EC centrifugal fans automatically adjust airflow speed based on grow room temperature, humidity, and air pressure requirements. This intelligent regulation ensures uniform air circulation, prevents condensation buildup or uneven humidity distribution, and significantly enhances energy efficiency. EC fans consume far less energy than traditional fans, delivering powerful airflow while reducing power consumption and operational costs.

    Energy-Saving Technologies

    When multiple compressors operate simultaneously, they generate substantial heat. Traditional HVAC systems directly release this heat through condensers. However, Altaqua GWS Series Grow Room HVAC System utilizes a reheater to recover a portion of the heat. This recovered heat is used to reheat dehumidified air, which is then returned to the grow room to prevent excessively low temperatures and maintain optimal growing conditions. Another portion of the heat can be recycled into the circulating water system to supply heated water required for the grow room.



    During grow room operation, moisture in the air condenses into water during the cooling coil and dehumidification processes. Traditional HVAC systems typically discharge this condensate directly. In contrast, Altaqua GWS Series Grow Room HVAC System collects the condensate into drainage pipes. After proper treatment, this water is reused to replenish the cooling tower or cooling water circulation system, improving overall water resource utilization.

    Professional Supports

    In grow room environmental control, precise temperature and humidity management is critical. Choosing a suitable water-cooled Grow Room HVAC system not only impacts the stability of the growing environment but also directly affects energy consumption costs and crop yields. We understand that every cultivation project has unique requirements. Therefore, we provide not only comprehensive technical support for existing clients but also free system sizing proposals and professional consultation for all potential customers interested in our products, helping you identify the most compatible indoor cultivation hvac equipment.

    If you are seeking a high-efficiency, reliable water-cooled Grow Room HVAC solution or have any questions about our products, please contact our team anytime. We offer free system recommendations, in-depth technical explanations, and tailored support to help you build the optimal environmental control system, ensuring your grow room maintains peak performance at all times.

    Get Started With A Free Proposal

    Let’s work together to design a climate control solution that fits your grow room needs and budget. Contact us now for a free, personalized proposal.