Galvanized Iron (GI), Mild Steel (MS), Stainless Steel (SS) & Aluminum Ducting Systems
(Fabrication, Installation, Testing & HVAC Duct Execution Services)
GI / MS / SS / Aluminium Ducting Systems – Engineering Execution & Field Services
GI (Galvanized Iron), MS (Mild Steel), SS (Stainless Steel), and Aluminium Ducting Systems form the structural backbone of HVAC air distribution networks. These duct systems are engineered to transport conditioned air, fresh air, exhaust air, and return air efficiently across commercial, industrial, and institutional facilities.

Material selection depends on:
- Air type (supply / return / exhaust / process)
- Environmental exposure
- Corrosion resistance requirement
- Hygienic compliance
- Pressure class
- Fire safety regulations
- Budget and lifecycle considerations
Compress India provides complete HVAC duct fabrication and installation services including site fabrication, factory prefabrication, erection, insulation, leakage testing, retrofitting, repair, and AMC services.
HVAC Duct Fabrication & Installation Services
We execute complete ducting networks as per project drawings and engineering standards.
Scope of work includes:
GI duct fabrication as per SMACNA standards
MS duct fabrication for industrial exhaust
SS ducting for hygienic and corrosive environments
Aluminium duct installation
Rectangular and circular duct fabrication
Spiral duct installation
Flange and slip joint fabrication
Reinforcement as per pressure class
Duct hanger and support installation
Anchor bolt fixing and structural supports
On-site duct modification
Insulation (thermal / acoustic) application
Cladding and vapor barrier installation
Engineering focus areas:
Pressure class design (Low / Medium / High)
Gauge thickness selection
Air velocity calculation
Static pressure drop calculation
Reinforcement spacing
Leakage class compliance
Fire-rated duct compliance (where applicable)
Material Selection & Application Areas
Correct material selection ensures durability, performance, and compliance.
- GI Ducting: Commonly used for commercial supply and return air systems.
- MS Ducting: Used for industrial exhaust, kitchen exhaust, and high-temperature applications.
- SS Ducting: Used in pharmaceutical, food-grade, and corrosive environments.
- Aluminium Ducting: Used in lightweight installations and corrosion-sensitive areas.
Testing & Commissioning
Proper testing ensures airtight and performance-compliant duct systems.
Our testing services include:
- Duct leakage testing
- Airflow CFM validation
- Static pressure verification
- Visual inspection of joints
- Insulation inspection
- Hanger load testing
- Vibration check
Compliance Assurance
Testing confirms compliance with design specifications and industry standards.
Duct Repair & Rectification Services
We provide corrective services for:
- Air leakage issues
- Damaged duct sections
- Corrosion repair
- Insulation replacement
- Joint sealing
- Structural support reinforcement
- Noise and vibration problems
- Improper airflow distribution
Root Cause Analysis
Root cause analysis ensures restoration of proper air distribution efficiency.
Retrofitting & Duct Modification Works
Existing buildings often require duct modifications.
We execute:
- Duct resizing
- Additional branch connections
- Rerouting works
- Replacement of corroded ducts
- Pressure class upgrade
- Fire-rated duct retrofitting
- Acoustic lining upgrade
Improved Efficiency
Retrofitting improves airflow balance and system efficiency.
Insulation & Acoustic Treatment
Duct insulation ensures energy efficiency and condensation control.
We provide:
- Thermal insulation
- Acoustic insulation
- Vapor barrier application
- Aluminium cladding
- Anti-condensation treatment
- Fire-rated insulation systems
Energy & Noise Control
Proper insulation improves energy efficiency and noise control.
Preventive Maintenance & AMC Services
Routine inspection ensures long-term duct integrity and performance.
Our AMC services include:
- Joint inspection
- Sealant inspection
- Corrosion check
- Insulation integrity check
- Support alignment verification
- Leakage detection
- Cleaning (if required)
Customized AMC Plans
Customized Annual Maintenance Contracts (AMC) are structured for commercial and industrial HVAC systems.
Energy Efficiency & Air Distribution Optimization
Optimized duct systems improve airflow and reduce fan energy consumption.
We conduct:
- Static pressure optimization
- Air balancing coordination
- Velocity correction
- Leakage reduction
- System performance benchmarking
Uniform Comfort
Optimized air distribution ensures uniform comfort and reduced operational cost.
Connect with Our HVAC Engineering Team
For professional fabrication, installation, testing, repair, retrofitting, insulation, or AMC services for GI / MS / SS / Aluminum Ducting Systems, connect with our HVAC engineering team for reliable and performance-driven air distribution solutions.
Related HVAC Systems & Engineering Services
GI / MS / SS / Aluminium Ducting Systems are closely associated with:

Pre-Insulated (PIR / PUF) Ducting
Learn More
Fabric & Flexible Duct Systems
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Air Diffusers & Grilles
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Dampers & Airflow Control Devices
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Canvas & Connection Joints
Learn More
Comfort Ventilation Systems
Learn More
Fresh Air & IAQ Systems
Learn MoreFrequently Asked Questions
What are GI, MS, SS, and Aluminium Ducting Systems?
These are the primary materials used for HVAC air distribution ducts. GI (Galvanized Iron) is standard for commercial supply/return air. MS (Mild Steel) is used for industrial and high-temperature exhaust. SS (Stainless Steel) is for hygienic and corrosive environments. Aluminium is for lightweight and corrosion-sensitive applications.
What standards do you follow for duct fabrication?
We fabricate GI ducts as per SMACNA (Sheet Metal and Air Conditioning Contractors' National Association) standards. For MS and SS ducts, we adhere to relevant industrial codes ensuring pressure class compliance, gauge thickness, reinforcement spacing, and leakage class requirements.
Do you provide AMC for ducting systems?
Yes, we offer Annual Maintenance Contracts (AMC) for ducting systems. Our AMC includes joint inspection, sealant inspection, corrosion check, insulation integrity verification, support alignment checks, and leakage detection to ensure long-term performance and system integrity.
What is duct leakage testing and why is it important?
Duct leakage testing measures the airtightness of the ductwork. It's crucial because leaks lead to significant energy loss, reduced airflow at terminals, unbalanced pressure, and poor IAQ. We perform leakage tests to ensure compliance with design specifications and to guarantee system efficiency.
Can you retrofit ductwork in an existing building?
Yes, we specialize in retrofitting and duct modification works for existing buildings. This includes duct resizing, adding new branch connections, rerouting ducts, replacing corroded sections, upgrading pressure class, and installing fire-rated or acoustic linings to meet new requirements.
What is included in duct insulation services?
Our duct insulation services include thermal insulation to prevent energy loss, acoustic insulation for noise control, vapor barrier application to prevent condensation, aluminium cladding for mechanical protection, and anti-condensation treatment, using fire-rated materials where required.
How do I choose between GI, MS, SS, and Aluminium?
Selection depends on air type (supply/exhaust), environmental exposure, corrosion resistance needs, hygienic compliance (SS for pharma/food), pressure class, fire safety regulations, and budget. GI is standard for commercial, MS for industrial exhaust, SS for corrosive areas, and Aluminium for lightweight needs.
What are the signs of a failing duct system?
Signs include visible air leaks at joints, high energy bills (indicating leakage), inconsistent room temperatures, excessive noise or vibration, visible corrosion or damage, condensation on ducts, and poor IAQ due to improper airflow distribution.
How can I improve the energy efficiency of my duct system?
Efficiency can be improved by conducting static pressure optimization, air balancing coordination, velocity correction, reducing duct leakage, adding proper insulation, and performance benchmarking. This reduces fan energy consumption and ensures uniform comfort.
What does your duct installation service include?
Our installation service covers site or factory fabrication, erection, hanger and support installation, joint sealing, insulation application, and comprehensive testing including leakage tests and airflow validation, ensuring the system meets all design and performance criteria.