HVAC Pre-Air Filters
Rainbow Air Systems supplies premium HVAC and HEPA pre-filters for commercial facilities across Australia. Our pre-air filters are designed to improve indoor air quality and extend the service life of HEPA filters.
Used across healthcare facilities, pharmaceutical environments, laboratories, food-production sites, commercial buildings and other specialised facilities, our replacement filters help maintain optimal airflow, improve HVAC performance and support compliance with relevant Australian requirements.
Our Products
Cardboard Framed Filters
Panel Filters
Fiberglass Filters
Multiwedge Pocket Filters
Pyracone & Pyracube Filters
Multiwedge Bag Filters
Disposable V Form Filters
Four Peak Filters
Washable V Form Filters
Why Choose Rainbow Air Systems for HEPA Pre-Filters
70 years of trusted filtration expertise
Australian-owned and operated business
Full-service capability, including supply, installation, testing and validation
Strong support team servicing clients
Reliable supply of HEPA pre-filters for critical environments
Our pre-air filters protect HVAC systems, reduce maintenance downtime and improve airflow efficiency across commercial sites.
Pre-Air Filters for High-Demand Commercial HVAC Systems
Rainbow Air Systems provides a complete range of HVAC pre-filters for commercial applications.
Pre-filters are the first line of defence in an HVAC system, capturing larger dust particles, debris and contaminants before the air reaches HEPA or carbon filters. This improves system performance and extends the service life of downstream filters.
Our HVAC pre-filters include pleated pre-filters, standard panel pre-filters and custom solutions tailored to specific commercial requirements. HEPA pre-filters are used in critical environments to help maintain high air-quality standards.
They are designed for easy installation in air-handling units or duct systems. We also provide filter media, holding frames and custom pre-filters for specialised projects.
Explore More Pre-Filter Solutions
Multiwedge Pocket Filters – High-capacity filters for air-handling units.
Panel Filters – Easy-to-install filters for routine air cleaning in commercial settings.
Washable V-Form Filters – Reusable pre-filters for heavy-duty applications.
Frequently Asked Questions
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An HVAC pre-filter captures larger dust particles, debris and contaminants before the air enters the main HVAC or HEPA filtration system. It protects downstream filters, improves airflow efficiency and extends the service life of more expensive high-efficiency filters.
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Pre-filters should be inspected regularly and replaced according to system usage, contamination levels and pressure-drop readings. In commercial environments, filters are commonly checked monthly and replaced every three to six months, or sooner when heavily loaded.
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HVAC filtration in Australia is governed by applicable Australian and New Zealand standards covering ventilation, air quality, filtration efficiency, airflow and performance requirements. Rainbow Air Systems supplies pre-filters designed to meet relevant requirements for commercial systems.
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Pre-filters are installed in air-handling units, ductwork or filter banks, usually using holding frames. Correct installation helps maintain airflow efficiency and filtration performance while protecting downstream HEPA or carbon filters.
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Yes. Rainbow Air Systems manufactures custom pre-filters for specialised commercial HVAC systems. Custom solutions can be designed to integrate with unique air-handling units, duct layouts and controlled environments.
Since 1956, Rainbow Filters has offered much more than air filters. In fact, we propose the highest quality air filtration solutions with huge advantages in terms of both effectiveness and economy.