HVAC and Air Purifiers

HVAC & Air Handling Design
HEDONE USA LLC designs and engineers advanced HVAC and Air Handling Unit (AHU/CAHU) systems for commercial and healthcare facilities. Our solutions integrate multi-stage filtration (Pre-filter + HEPA H14), UV-C germicidal lamps, heat recovery systems, and precision temperature control (±1°C) to maintain stable and controlled indoor environments.

Hospital-Specific Environmental Control

For hospitals, our systems are tailored for operating rooms, ICUs, isolation rooms, CSSD units, laboratories, and cleanrooms. We implement pressure cascade design (positive and negative pressure rooms), controlled humidity levels, and optimized Air Changes per Hour (ACH) to ensure infection control, contamination prevention, and regulatory compliance.

Air Distribution & Intelligent Monitoring

We design complete air distribution ductwork and pipeline infrastructure, including supply, return, and exhaust systems with airflow balancing, VAV control, pressure dampers, and sensor-based monitoring. Integrated PLC/SCADA systems provide real-time environmental tracking, ensuring energy efficiency, operational reliability, and full control of critical healthcare spaces.

Applications

Hospital Operating Theaters
Intensive Care Units (ICUs)
Cleanrooms in Pharmaceutical & Biotech Manufacturing
Medical Device Production Areas
Isolation and Recovery Rooms
With a sleek medical-grade housing and silent operation, this device not only enhances airflow quality but integrates seamlessly into modern clinical environments.

Fans and Blowers

In hospital environments, the performance and reliability of Air Handling Units (AHUs) and Central Air Handling Units (CAHUs) are critical for maintaining clean and controlled air quality. We utilize a range of high-quality fans and blowers designed to meet the demands of healthcare facilities. These components ensure optimal airflow, efficient filtration, and proper air pressure control.

Centrifugal Fans, Axial Fans, Plug Fans

Mixed Flow Fans, EC/AC Fans, Backward Inclined Fans

Inline Fans and Vane Axial Fans

Cooling and Heating Coils

These coils play a critical role in regulating air temperature to create optimal conditions for hospital environments, such as operating rooms, patient wards, and diagnostic areas.

Cooling Coils: Cooling coils are responsible for lowering the temperature of the air. These coils contain chilled water or refrigerant that absorbs heat from the passing air, reducing its temperature to achieve the desired cooling effect. The cooling process ensures a controlled, cool environment essential for maintaining comfort and meeting the operational requirements of healthcare facilities.

Heating Coils: Heating coils are designed to raise the temperature of the air. They use hot water or steam as a heat source, transferring energy to the air flowing over them. These coils are essential for providing warmth, particularly in colder seasons, ensuring that air delivered into hospital spaces is at a comfortable and safe temperature.

Technical Specifications:

Material: Copper tubes with aluminum fins (standard) or stainless steel (for corrosive environments).
Tube Diameter: 9.52mm (3/8”), 12.7mm (1/2”), and 15.88mm (5/8”) available.
Fin Density: 4 FPI (fins per inch) to 12 FPI for optimized heat transfer efficiency.
Coil Length: 300 mm to 2000 mm, customizable based on unit size.
Pressure Rating: Up to 15 bars (water/steam), ensuring durability in demanding hospital environments.
Fluid Types: Chilled water, glycol mixture (for cooling coils), hot water, or steam (for heating coils).
Fin Spacing: Adjustable between 1.5 mm to 5 mm for performance optimization.
Air Flow: Coils can handle airflow rates from 200 CFM to 10,000 CFM.
Heat Transfer Coefficient: Highly efficient, ranging from 5.0 W/m²K to 12.0 W/m²K depending on the specific coil design and application.

These coils are engineered for long-term durability, high heat transfer efficiency, and minimal maintenance, making them well-suited for the stringent requirements of hospital HVAC systems.

Humidifiers and Dehumidifiers

They ensure optimal humidity levels, which are vital for maintaining air quality, preventing microbial growth, and ensuring comfort and safety for patients and staff.

Humidifiers:

Humidifiers in AHUs/CAHUs add moisture to the air to maintain adequate humidity levels, especially in dry conditions. This is essential in hospital environments to prevent dry air, which can lead to respiratory discomfort and increase the spread of airborne pathogens.

Technical Specifications:

Type: Steam or Ultrasonic Humidifier
Capacity: 2 - 150 kg/hr
Steam Output Pressure: 2.5 - 3 bar
Water Supply: Demineralized or distilled
Humidity Control Range: 30% - 95% RH
Power Supply: 220-240V, 50/60Hz
Efficiency: 98% evaporative efficiency
Safety Features: Auto-shutdown on low water levels, anti-scald protection
Material: Stainless steel or corrosion-resistant plastic

Dehumidifiers:

Dehumidifiers remove excess moisture from the air, which is especially important in high-humidity environments to prevent mold and bacterial growth. They help maintain controlled humidity levels within operating rooms, intensive care units, and other sensitive areas.

Technical Specifications:

Type: Refrigerant or Desiccant Dehumidifier
Capacity: 20 - 500 L/day
Moisture Removal Efficiency: 95%
Airflow Rate: 500 - 10,000 m³/h
Humidity Control Range: 20% - 80% RH
Power Supply: 220-240V, 50/60Hz
Energy Efficiency: Energy-saving mode, low power consumption
Noise Level: Less than 45 dB(A)
Material: Stainless steel or coated steel housing for corrosion resistance

These components are vital for maintaining precise air quality control in hospital environments, ensuring the comfort and safety of patients and medical staff.

Air Dampers

These dampers are essential for maintaining air quality and precise climate control, which is vital in sensitive areas like operating rooms and intensive care units. They ensure optimal air exchange and filtration by managing the flow of fresh, recirculated, or exhaust air.

Technical Specifications:

Material: High-grade aluminum or galvanized steel to prevent corrosion and ensure durability in medical environments.

Blade Design: Opposed or parallel blade configurations for precise airflow control.

Blade Seals: Flexible seals to minimize leakage and ensure energy efficiency.

Actuation: Manual, electric, or pneumatic actuators for adjustable control and automation.

Leakage Class: Class 1 or 2, depending on application requirements, to meet industry standards for minimal air leakage.

Temperature Range: Operates effectively between -20°C to 80°C.

Pressure Rating: Designed to handle air pressures up to 3000 Pa.

Frame Construction: Low-profile frame to ensure smooth installation within AHUs/CAHUs.

Finish: Powder-coated or anodized for additional protection against environmental factors and wear.

Heat Recovery Units

Where air purity and temperature control are critical, HRUs play a vital role in ensuring comfort while conserving energy. The heat exchange process in these units is designed to operate without contaminating the fresh air supply, ensuring that airflows remain separate and clean. HRUs are often used in ventilation systems that require a balance between energy efficiency and indoor air quality.

Technical Specifications of Heat Recovery Units (HRUs):

Efficiency: Up to 85% thermal efficiency depending on design.

Airflow Capacity: Typically ranges from 1,000 m³/h to 50,000 m³/h (customizable depending on the system size).

Heat Exchanger Type: Counter-flow, cross-flow, or rotary heat exchangers.

Materials: Aluminum, plastic, or corrosion-resistant coated steel for the heat exchanger to ensure durability and hygiene.

Operating Temperature: -20°C to +50°C, depending on the model.

Pressure Drop: Between 150 Pa and 300 Pa (varies with capacity and airflow).

Bypass Mode: Automatic or manual bypass damper to avoid heat recovery when not required, such as in free cooling scenarios.

Noise Levels: Low-noise design, typically below 40 dB(A).

Filtration Options: Integrated with high-efficiency filters (HEPA or MERV-rated filters) for enhanced air quality.

Control System: Intelligent control systems for automated regulation of temperature, humidity, and air quality.

UV-C Germicidal Lamps

UV-C Germicidal Lamps are a critical component in air handling systems designed for hospital environments. These lamps emit ultraviolet light in the UVC range, effectively sterilizing the air by destroying airborne pathogens such as bacteria, viruses, and mold spores. The incorporation of UV-C lamps in AHUs and CAHUs helps ensure clean, sanitized air circulation, which is vital for patient care and infection control in hospitals.

Technical Specifications:

Wavelength: 254 nm (germicidal UVC range)

Lamp Power: Typically between 30W to 120W, depending on unit size and air volume.

Effective Lifespan: 9,000 to 12,000 hours, with minimal degradation in output.

Housing Material: High-quality quartz glass tube for maximum UV-C output and resistance to corrosion.

Operating Temperature: -10°C to 40°C.

Ballast Type: Electronic, optimized for efficient lamp operation.

Installation Position: In-duct or coil-mounted for optimal air and surface disinfection.

Safety Features: UV-C protective shields and interlock mechanisms to prevent accidental exposure.

Irradiance: Ranges from 100 to 200 μW/cm² at 1 meter distance.

Sensors and Controls

Sensors and controls are critical components in the operation of Air Handling Units (AHU) and Central Air Handling Units (CAHU) used in hospitals. They ensure precise monitoring, adjustment, and control of various environmental parameters, contributing to energy efficiency, air quality, and maintaining proper ventilation.

Types of Sensors and Controls:

Temperature Sensors:

Temperature Range: -40°C to 150°C
Accuracy: ±0.2°C
Response Time: ≤ 5 seconds

Humidity Sensors:

Humidity Range: 0-100% RH
Accuracy: ±1.5% RH
Response Time: ≤ 10 seconds

Pressure Sensors:

Pressure Range: 0-2500 Pa
Accuracy: ±1.5% FS (Full Scale)
Output: 4-20mA / 0-10V

Airflow Sensors:

Airflow Range: 0.2 - 20 m/s
Accuracy: ±0.1 m/s
Output: 4-20mA

CO2 Sensors:

CO2 Measurement Range: 0-5000 ppm
Accuracy: ±30 ppm + 3% of reading
Response Time: < 60 seconds

VOC (Volatile Organic Compounds) Sensors:

VOC Measurement Range: 0-1000 ppb
Accuracy: ±10%
Output: 0-10V

Control Systems:

Protocols: Modbus, BACnet

Display: LCD/Touchscreen (7-inch/10-inch options)

Communication: Ethernet, RS485

Ductwork

Ductwork is a critical component in the air handling systems of hospitals, serving as the network through which air is distributed, conditioned, and returned. It ensures efficient airflow, maintaining the desired environmental conditions in various hospital areas such as operating rooms, intensive care units, and patient wards. Ductwork plays a key role in maintaining clean, filtered air, reducing airborne contaminants, and controlling temperature and humidity levels.

Key Technical Specifications for Ductwork:

Material: Galvanized steel, aluminum, or stainless steel, depending on hospital standards and requirements.

Insulation: Internal or external insulation with thermal resistance (R-value) to minimize heat loss and prevent condensation, typically using fiberglass or foam materials.

Air Leakage Class: Certified to low-leakage standards, usually in compliance with Class A or B ductwork leakage specifications.

Pressure Rating: Ductwork is designed to handle both positive and negative pressure environments, typically rated between 250-2000 Pa.

Size and Dimensions: Customizable according to the hospital layout and airflow requirements, adhering to SMACNA or DW144 duct construction standards.

Fire Resistance: Complies with fire safety regulations, including fire-rated coatings or fire damper integrations.

Noise Control: Integrated sound dampening features to reduce noise transmission, essential for hospital environments.

Mixing Box

The purpose of the Mixing Box is to maintain indoor air quality and ensure energy efficiency by optimizing the ratio of fresh air to recirculated air. This results in better temperature control and energy savings, as less energy is required to heat or cool the air.

Key Features and Technical Specifications:

Material: High-quality galvanized steel or stainless steel construction for corrosion resistance and durability.

Air Dampers: Equipped with modulating air dampers for precise control of the air mixture. These dampers can be automated via the unit's control system to adjust based on temperature, CO₂ levels, or humidity.

Sealant System: Incorporates high-efficiency gaskets to ensure minimal air leakage and optimal mixing performance.

Actuators: Electronically controlled actuators for smooth damper operation, allowing real-time adjustments to air volume.

Pressure Rating: Designed to withstand static pressures of up to 1,500 Pa.

Airflow Capacity: Supports airflow rates ranging from 1,000 CFM to 100,000 CFM, depending on the size of the unit and application.

Thermal Insulation: Built-in thermal insulation to reduce energy losses during the mixing process.

Noise Reduction: The structure is designed with noise-dampening features to ensure quiet operation in sensitive hospital environments.

Air Purifier - Negative Ion Technology

Discover the PK-S Series Air Purifier by HEDONE USA – engineered specifically for the demanding environments of hospital operating rooms, intensive care units, and isolation rooms. Featuring advanced UV-C light technology and a negative ion generator, this purifier ensures maximum air sanitation. With its ultra-quiet fan operation, the PK-S Series maintains a peaceful atmosphere while delivering reliable, high-performance air purification, enhancing safety and comfort in critical medical settings.

Minimizing Infection at ICU

Key Benefits of a Negative Ion Generator in Intensive Care Units for Infection Control:

Airborne Particle Reduction: Negative ions bind to harmful particles like bacteria, viruses, and dust, causing them to fall from the air, reducing the spread of infections.

Enhanced Air Purification: Negative ions help neutralize pathogens in the air, contributing to a cleaner, safer environment for patients and staff.

Improved Respiratory Health: Cleaner air with fewer contaminants aids in reducing respiratory infections and complications in vulnerable patients.

Increased Healing Environment: By improving air quality, negative ions create a more conducive atmosphere for patient recovery and healing.

Odor Elimination: Negative ions help to neutralize unpleasant odors, maintaining a more comfortable and sterile environment in critical care areas.

Purifying Air, Reducing Virus Colonization

Electric energy of plasma adopts high voltage to produce strong electric field around electrode, which will make hazardous material be with electric charge. Through collecting electric charge purification and degrading organic contaminant, it directly degrades formaldehyde, PM2.5, etc into innocuous substances, which can efficiently remove contaminant and kill microorganisms.

High energy and active particles in plasma can rapidly kill bacteria and disinfect. Measurements and calculations of plasma temperature and density in the discharge area proved that the plasma electrostatic adsorption device can effectively destroy all pathogens in the air.

This air purifier quickly and effectively reduces carbon-based contaminants, providing fresh, clean smelling air in only minutes. What are carbon-based contaminants? Some of the more familiar carbon-based contaminants include mold, bacteria, viruses, odors and volatile organic compounds.

Reinforced Negative Ion Generator

P-KS Series has one of a kind DualGeneration Technology built in:

Double Plasma Generation
16x10⁶/cm³ Negative Ion Generation in hour
Long Lasting Fresh Unpoluted Air

Effective for:

PM10, PM2.5, VOC
Mold, Fungie, Virus, Bacterias
COVID-19 and its varients
Odor, Aeroallergens and similar Pathogens

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