One of the most common questions we receive is: What’s the difference between HEPA filters with wooden frames and those with metal frames? If you’re trying to decide which type of HEPA filter is best suited for your needs, this article will guide you through the key differences - beyond just the frame material.
While there are several distinctions between wooden and metal-framed HEPA filters, it’s important to emphasise that filtration performance remains identical. Both types meet the same high-efficiency particulate air (HEPA) standards, meaning the air quality they deliver is equally effective.
- Cost
Arguably the first noticeable difference is the price. Metal-framed HEPA filters tend to be more expensive than their wooden counterparts, largely due to the higher cost of raw metal materials, the additional labour involved in fabricating metal frames, and the standard inclusion of protective mesh screens on both sides of metal-framed filters. These mesh screens protect the delicate internal filter media from damage, ensuring consistent filtration performance. While protective mesh can be added to wooden frames, doing so increases their weight and restricts disposal options—negating some of the advantages of using wood.
- Weight
If you’re dealing with large air filter panels or installations in tight, overhead, or awkward spaces, weight becomes a major factor. Wooden-framed HEPA filters are significantly easier to move - often over 50% lighter than their metal-framed counterparts. This makes handling, installation, and maintenance much easier in certain environments.
- Disposal and Environmental Impact
When it comes to disposal, wooden-framed HEPA filters are easy to incinerate. With only small metal staples holding the frame together, these filters are more environmentally friendly in terms of end-of-life processing - assuming no protective mesh is used.
Metal-framed HEPA filters, while not suitable for incineration, can often be recycled. Whether incineration or recycling is possible will depend on local regulations and the contaminants the filter has been exposed to.
- Suitability for Different Environments
Perhaps the most important consideration is the environment in which the filter will be used. We recommend metal framed filters for damp or high-humidity environments, and areas with potential risk of moisture exposure. Unlike wood, metal does not absorb moisture, making it less susceptible to microbial contamination. Using wooden-framed HEPA filters in moisture-prone areas could compromise the filter’s integrity and performance, which defeats the purpose of investing in HEPA-level air purification.
In summary, both wooden and metal-framed HEPA filters offer the same level of air filtration efficiency, so your decision should be based on other practical considerations.
Choose a metal-framed HEPA filter if:
- Durability and moisture resistance are top priorities
- The filter may be exposed to damp conditions
- You want added protection from mesh screens as standard
Choose a wooden-framed HEPA filter if:
- Budget and weight are key concerns
- The installation environment is dry and controlled
- You prefer easier disposal and a lower carbon footprint
Still Not Sure Which HEPA Filter Frame to Choose?
We’re here to help. If you need personalised advice based on your facility, budget, or installation environment, don’t hesitate to reach out. Contact us via phone, email, or through the form on our
contact page. Our expert team is ready to provide recommendations tailored to your specific air filtration needs.