Air Handling Units (AHU)
While the Laminar Air Flow (LAF) system delivers the air, the AHU is the massive engine that creates it. A hospital-grade Air Handling Unit is responsible for cooling, dehumidifying, pressurizing, and pre-filtering the air before it ever reaches the surgical suite. We engineer double-skin thermal break AHUs that guarantee absolute climate control and zero condensation.
- Double-Skin Thermal Break
- High Efficiency EC Plug Fans
- UVGI Coil Sterilization
- Class 100 / ISO 5 Compliant
Product Configurations
Every configuration is precision-manufactured and modularly designed to fit your exact demands.
Hygienic / Cleanroom AHU
Built specifically for infection control and sterile environments. This is the mandatory base system for all modular OTs, ICUs, and Neonatal Intensive Care Units (NICUs). It is completely engineered around structural integrity and zero microbial growth.
These units feature double-skin PUF insulated panels to prevent any thermal leakage or condensation. The internal surfaces are perfectly smooth, utilizing stainless steel or anti-microbial coatings to prevent bacterial nesting, alongside rigorous multi-stage filtration (Pre + Fine + HEPA) to continuously purify the air loop.
Laminar Flow AHU System
Deployed almost exclusively for advanced Operation Theatres. This highly specialized Air Handling Unit is engineered with massive motor capacity to handle the intense static pressure required to force air through dense terminal HEPA filters located at the end of the duct line.
It works in perfect tandem with the OT's ceiling plenum to create a unidirectional, vertical airflow over the surgical table. By precisely regulating blower speed via VFDs, the AHU guarantees a strict, uniform air velocity of ~0.25–0.35 m/s, acting as an invisible curtain that washes away surgical contaminants.
Treated Fresh Air Unit (TFA)
Critical for maintaining positive pressure and flushing out dangerous anesthetic gases from the OT. A Treated Fresh Air (TFA) unit utilizes 100% outside air with absolutely zero recirculation.
Because raw outdoor air in India is typically hot, humid, and heavily polluted, this heavy-duty unit is equipped with massive, deep-row cooling coils. It handles the immense thermal load of completely cooling, aggressively dehumidifying, and multi-filtering the raw air before constantly pushing it into the OT to maintain the strict +15 Pa pressure requirement.
Return Air / Recirculation AHU
Designed to dramatically improve energy efficiency and lower hospital electricity bills by reusing already cooled and conditioned air. This unit intelligently mixes return air from the facility with a calculated ratio of fresh outdoor air.
While primarily used in large hospital corridors, lobbies, and general patient wards, it is also used carefully in OT support areas. When deployed in clinical zones, it is always paired with strict HEPA filtration banks and UVGI sterilization to ensure that recirculating the air does not result in bacterial cross-contamination across wards.
Anatomy of Safety
Our systems are governed by extreme safety protocols to ensure zero-defect, fail-safe operation.
Double-Skin Thermal Break Housing
The outer cabinet of the AHU is critical. If a standard single-metal cabinet is used, the cold air inside will cause the warm outside air to condense, leading to severe "sweating," internal rust, and water-borne bacteria. We manufacture Double-Skin cabinets separated by a thick layer of high-density injected PUF (Polyurethane Foam), utilizing Thermal Break aluminum profiles to ensure zero temperature transfer and zero condensation.
- • Eliminates Condensation
- • High-Density PUF Insulation
EC Plug Fans & Centrifugal Blowers
To push air through dense HEPA filters at the end of the duct line, the AHU must generate massive static pressure. We utilize backward-curved centrifugal blowers or highly advanced EC (Electronically Commutated) Plug Fans. EC fans eliminate belts and pulleys, operating silently. Connected to a VFD, they automatically adjust speed to maintain exact positive pressure inside the OT, saving massive electricity.
- • Massive Static Pressure
- • VFD Energy Efficiency
Multi-Stage Pre-Filtration
You cannot send raw outdoor air directly to a delicate HEPA filter; it would clog within days. Our AHUs incorporate a robust multi-stage filtration bank. First, a washable aluminum G4 Pre-Filter (10-20 microns) catches large dust and pollen. Next, a synthetic F7/F9 Fine Bag Filter (1-5 microns) captures finer particulate matter before the air reaches the critical surgical zones.
- • Protects Terminal HEPA
- • G4 & F9 Filter Banks
UVGI Coil Sterilization
The cooling coils inside an AHU are constantly wet due to condensation. This dark, damp environment is notorious for breeding mold and biofilm, leading to "Sick Building Syndrome." We install Ultraviolet Germicidal Irradiation (UVGI) lamps directly inside the coil section to physically destroy the DNA of mold and bacteria before the air enters the hospital ductwork.
- • Destroys Mold & Biofilm
- • Prevents Sick Building Syndrome
Key Applications
Modular Operation Theatres
Intensive Care Units (ICU)
IVF & Fertility Labs
Isolation Wards & Corridors
Why Choose MedGenz?
We don't just supply equipment; we engineer and execute complete turnkey hospital ecosystems.
Turnkey Solutions
By providing End to End HVAC system solutions, we eliminate delays and ensure strict quality control.
ISO & CE Certified
Our processes and products strictly adhere to ISO 9001:2015, ensuring medical-grade outcomes.
Pan-India Execution
Headquartered in Delhi NCR, our engineering teams travel directly to your hospital site anywhere.
Lifetime Support
Our relationship doesn't end after handover. We provide comprehensive lifetime maintenance.
Stabilizing OT Humidity in Maharashtra
A major surgical center located near the coast in Maharashtra was struggling with extreme humidity in their operation theatres during the monsoon season. Surgeons were complaining about fogged microscopes, and the high moisture was putting sterile instruments at risk of contamination. Their existing, cheap commercial AHU could not handle the latent heat load.
The Solution: We designed and installed a massive Double-Skin Thermal Break DX AHU specifically engineered for deep dehumidification. We integrated a specialized wrap-around heat pipe mechanism that pre-cooled the air before the coil and re-heated it after, flawlessly maintaining the strict NABH requirement of 50% ± 5% Relative Humidity without excessive electricity costs.
Technical Specifications
| Cabinet Construction | Double Skin with 43mm/50mm PUF insulation (Density 40kg/m³) |
|---|---|
| Frame Profile | Extruded Aluminum with Thermal Break design |
| Inner Skin Material | SS-304 Stainless Steel or GI Plain Sheet (to prevent rust/shedding) |
| Fan Technology | Direct Driven EC Plug Fans (Energy efficient & silent) |
| Coil Type | Copper Tubes with Hydrophilic coated Aluminum Fins |
Our Certifications & Compliance
MedGenz is certified and trusted by leading regulatory bodies for healthcare safety.
Udhyam
Government of India recognized MSME Enterprise
CE Certified
European Conformity Standards for Medical Devices
ISO 9001
Quality Management System Certified
Import Export
Registered DGFT Import-Export License
Our Valuable Clients
Trusted by leading healthcare institutions across India. Drag to explore.
Frequently Asked Questions
Technical details regarding our Air Handling Units (AHU).
1.What is the difference between an AHU and a Laminar Air Flow (LAF) system?
The AHU is the 'engine' that sits outside the OT. It cools, dehumidifies, pressurizes, and pre-filters the air. The LAF is the 'delivery' unit inside the OT ceiling that pushes this treated air smoothly over the patient through final HEPA filters.
2.Why do hospital AHUs need a 'Double Skin Thermal Break'?
A thermal break prevents the cold internal temperature of the AHU from transferring to the outer metal casing. Without it, the AHU would 'sweat' (form condensation), leading to severe rust and potentially introducing water-borne bacteria into the ducting.
3.What is the role of UVGI in an AHU?
Ultraviolet Germicidal Irradiation (UVGI) lights are installed pointing directly at the AHU's cooling coils. Since coils are naturally damp, they can grow mold. UVGI destroys the DNA of bacteria and fungus on the coils before the air even enters the ductwork.
4.Why can't standard commercial AHUs be used in a Modular Operation Theatre?
Standard commercial AHUs lack proper thermal break insulation and the high-static blower capacity needed to push air through dense HEPA filters. Using a commercial unit in an OT leads to condensation, mold growth, inadequate air changes, and severe cross-contamination risks.
5.How do your AHU systems ensure compliance with NABH and ASHRAE 170 guidelines?
Our AHUs are engineered to achieve strict NABH and ASHRAE 170 parameters by maintaining precise temperature (21°C ± 3°C) and relative humidity (50% ± 5%), delivering the mandatory minimum air changes per hour (ACH), and sustaining a positive pressure gradient (+15 Pa) to block contaminated air from entering the sterile zone.
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