Pre-Insulated Antimicrobial Panels
The PI GUARD duct system is built from high-performance phenolic sandwich panels, featuring a rigid closed-cell phenolic foam core faced on both sides with reinforced aluminum foil.
This construction ensures outstanding thermal efficiency, fire safety, and long-term durability, making it ideal for modern HVAC applications where hygiene and performance are essential.
- Core Material: Rigid closed-cell phenolic foam
- Eco-Friendly Composition: 100% CFC-free and HCFC-free
- Density: 55–60 kg/m³
- Fire Performance: High resistance; Class 1 as per UL-181
- Smoke & Flame Spread: Very low indices for enhanced safety
- Thermal Conductivity: 0.021–0.036 W/m·K
- Moisture Protection: Zero water vapor transmission and excellent resistance to condensation
- Environmental Impact: ODP = 0, GWP < 5 (sustainable and low-impact)
- Aluminum Facing: Reinforced foil, thickness ≥ 250 microns
- Panel Thickness:
- 20 mm – Air-conditioned areas
- 30 mm – Plant rooms
- 30 mm – Outdoor or exposed ducting
- Specifications
- Technical Datasheet
- Technology
- Protection
- Catalogue
PI GUARD – Advanced Antimicrobial Panel Technology
PI GUARD represents a major technological advancement in maintaining clean, healthy air environments. Designed for areas where hygiene is critical, it protects both human health and industrial processes from the risks of microbial contamination.
Traditional HVAC ducts often provide an ideal environment for bacteria, fungi, and mold to grow. PI GUARD changes that by introducing active protection that prevents microorganisms from forming colonies inside the duct system.
Why Choose PI GUARD
PI GUARD is the ideal solution for those who value lightweight materials, safety, and air purity. It’s particularly suited for hospitals, laboratories, food industries, clean rooms, and any facility where hygiene is a top priority.
The system offers:
- Continuous antimicrobial protection
- Long-term hygiene and reduced maintenance
- Compliance with modern health and safety standards
- Effective protection against bacteria, fungi, and viruses, including SARS, Norwalk, and Avian Flu (H5N1)
Proven Technology Backed by Science
At the core of PI GUARD lies a patented compound that harnesses the natural antimicrobial power of silver. Through an advanced industrial process, this compound is permanently embedded into the aluminum surface of the panel.
This ensures uninterrupted antimicrobial action across all duct surfaces and components that come into contact with air. The result is a cleaner, safer, and more reliable HVAC system with lasting protection.
Designed for Today’s Standards and Tomorrow’s Needs
PI GUARD fully complies with international hygiene and environmental regulations. It can be used in both new installations and upgrades of existing duct systems, providing an efficient and cost-effective path to modernizing air distribution networks.
The system’s performance is backed by extensive research and collaborative development, ensuring its reliability in diverse environments.
Clean Air. Safe Spaces. Smarter Systems.
With PI GUARD, Pearl Industries brings innovation and hygiene together—delivering not just duct panels, but complete confidence in the air you breathe.
| Property | Specification |
| Panel Dimensions | 4000 × 1200 mm |
| Panel Thickness | 20 mm |
| Aluminium Facing | Reinforced aluminum facing with antimicrobial protection coating |
| Panel Density | 65±5 kg/m³ |
| Compressive Strength | 0.25 MPa |
| Thermal Conductivity | 0.020 – 0.036 W/m·K |
| Combustion Property | Class “O” – BS 476 Part 6 & 7 |
| Service Temperature | -30°C to +150°C |
| Water Absorption Rate | < 5% |
| Fire Rating (FSI) | < 25 |
| Smoke Density (SDI) | < 50 |
| Certifications | UL 181, DCL, DCD, ADCD |
Guaranteed Air: Technology with Awareness
Heating, ventilation, and air conditioning (HVAC) systems are part of our everyday environment. Whether in offices, commercial centers, or industrial facilities, they ensure thermal comfort—but they can also become sources of contamination.
Beyond noise and energy loss, a hidden risk lies in microbiological contamination caused by dust and particles settling inside traditional galvanized ductwork. These deposits become breeding grounds for bacteria, fungi, and viruses that affect air quality and human health.
The PI GUARD Difference
Unlike conventional galvanized ducts, PI GUARD from Pearl Industries goes beyond simply transporting air—it actively controls and protects it.
Made of high-density phenolic foam and aluminum facings, the pre-insulated PI GUARD panels solve the typical problems associated with traditional duct systems.
Key Advantages
- Corrosion Resistance:
The aluminum surface provides excellent resistance to corrosion, extending the system’s lifespan. - Superior Thermal Insulation:
Stable air temperature throughout the system means reduced energy consumption and consistent performance. - Reduced Noise Levels:
Smooth internal surfaces ensure quieter and more efficient airflow.
But PI GUARD doesn’t stop at physical improvements. With its Active Antimicrobial System, it prevents microbial contamination and proliferation within the ducts—ensuring safer, cleaner, and healthier air in every space.
An Active System for Safer Environments
Traditional ductwork only delivers air. PI GUARD ductwork delivers safe air.
Each component is designed to actively contribute to air hygiene, turning the duct system into a key element of health and safety within any building.
This technology’s success depends on awareness and proper implementation—from those who purchase, design, and install the system.
Engineers, fabricators, and project managers all share the responsibility to apply the technology correctly, ensuring full system performance and user safety.
Knowledge, Training, and Continuous Improvement
Pearl Industries supports this responsibility by investing in training and technical development.
PI GUARD offers specialized programs for engineers and fabricators, including design assistance software and hands-on fabrication workshops. These initiatives help professionals maximize the benefits of PI GUARD technology—lightweight handling, easy installation, reduced accident risk, and guaranteed air quality.
Delivering Healthy and Safe Air
PI GUARD is more than a duct system—it’s a complete approach to modern air management.
With its certified antimicrobial protection, energy efficiency, and reliability, PI GUARD ensures every breath indoors is cleaner, safer, and smarter.
PI GUARD – Certified Antimicrobial Duct System
Effective Protection Against Harmful Microorganisms
PI GUARD has been scientifically proven to be effective against a wide range of bacteria and fungi, including:
- Legionella Pneumophila
- Staphylococcus Aureus
- Pseudomonas Aeruginosa
- Escherichia Coli
- Candida Albicans
- Aspergillus Niger
- Salmonella Choleraesuis
- Listeria Monocytogenes
With reduction rates up to 99.9999%, PI GUARD provides long-lasting protection against microbial contamination inside HVAC duct systems.
Safe Air, Healthy Spaces
Air Quality as a Safety Priority
Air is essential to life—and to health. Clean air is not only about the absence of pollutants, but also about air that remains free from microbial contamination.
From hospitals and laboratories to offices, cinemas, and food processing areas, indoor air quality directly affects individual safety and public health. Poorly maintained HVAC systems can spread bacteria and viruses, creating risks that are often invisible but serious.
That’s why PI GUARD was developed: to deliver clean, safe, and hygienic air through ducts that don’t just transport air, but actively protect it.
Prevention Through Active Technology
Continuous Antimicrobial Action
The PI GUARD pre-insulated panel integrates an active antimicrobial compound directly into the aluminum surface of the panel. This is made possible by the panel’s lightweight phenolic core and advanced surface treatment, designed for high performance and long durability.
Unlike traditional antimicrobial coatings that only protect isolated parts of the duct, PI GUARD ensures full-surface protection. Every section of the duct system—including profiles, connectors, sealants, and flexible hoses—receives the same antimicrobial treatment, ensuring total hygiene across the installation.
How It Works
The antimicrobial effect is achieved through a silver-ion exchange process:
- Silver ions are incorporated into the inner aluminum layer.
- When exposed to air, these ions interact with sodium ions, releasing their antimicrobial action.
- This process disrupts the life cycle of bacteria, fungi, and viruses, preventing growth and spread across the duct’s surface.
This effect has been verified through laboratory testing and real-world use, showing a consistent germicidal action lasting up to 10 years.
Beyond Compliance – Active Health Protection
Complying with air filtration standards is important, but not enough. While filters help reduce chemical and particulate pollution, they cannot stop microbial contamination inside ducts. Diseases such as Legionella and Salmonellosis are airborne and can be transmitted through ventilation systems.
PI GUARD takes air safety a step further. It transforms the ductwork from a passive air carrier into an active protective system—working continuously to reduce infection risks and ensure a healthier indoor environment.
Proven Performance. Certified Protection.
With PI GUARD, Pearl Industries brings to the market a fully certified, high-performance antimicrobial duct system that combines:
- Proven effectiveness against bacteria and fungi
- Long-lasting antimicrobial action (up to 10 years)
- Full-system protection, including accessories
- Energy efficiency and eco-friendly operation
- Compliance with international hygiene and safety standards
PI GUARD – Because Clean Air Deserves Technology That Protects
Delivering more than air circulation—PI GUARD delivers confidence, safety, and lasting peace of mind.
Pearl-PIR
Antimicrobial Catalogue
WTI-Phenolic
Antimicrobial Catalogue
