The client’s existing monitor helps users understand indoor air quality conditions. The next logical step was to introduce a product capable of responding to those conditions and actively improving indoor air.

The new purifier needed to combine:

• Distinctive product design
• Reliable filtration performance
• More responsible material choices
• Controllable manufacturing cost
• A practical replacement-filter structure
• Future integration with the client’s indoor air quality ecosystem

Because the replacement filter is both a critical performance component and a recurring point of customer interaction, HisoAir and the client focused particularly on its structure, sealing method, environmental impact, cost, and branding flexibility.

Developing an innovative air purifier required balancing performance, sustainability, cost, and manufacturing feasibility.

Reducing Plastic in the Filter Structure
Many cylindrical filters use injection-molded plastic rings or end caps. These components increase plastic consumption, require dedicated tooling, extend development lead times, and make future dimensional changes more difficult.

For an emerging brand, dedicated plastic tooling would also increase initial investment and commercial risk.

Preventing Air Bypass
Filter performance depends not only on the media grade, but also on how effectively the media is sealed to the surrounding structure.

Limited or intermittent glue application may leave gaps around the filter media, creating a potential path for untreated air to bypass the intended filtration layers.

Balancing Sustainability and Cost
The new structure needed to reduce unnecessary material use without producing an excessively expensive replacement filter.

Supporting Future Product Changes
As the purifier was still under development, the filter structure needed enough flexibility to support dimensional, branding, and information changes without repeated tooling modification.

HisoAir developed a more sustainable and manufacturing-friendly cylindrical filter structure for the client’s new air purifier.

Paper-Based Filter Frame

Instead of conventional injection-molded plastic rings, HisoAir designed the cylindrical filter with a paper-based frame.

The proposed structure can:

• Reduce the use of molded plastic components
• Avoid dedicated plastic end-cap tooling
• Lower initial development investment
• Shorten preparation time for new filter versions
• Support easier dimensional adjustment during development
• Simplify end-of-life material handling
• Strengthen the product’s environmental design story

Because the paper structure can be adjusted without modifying a plastic mold, it also provides greater flexibility during prototyping and engineering refinement.

Flexible Branding and Product Information

The paper frame also provides a printable surface for customized product and service information.

Depending on the client’s requirements, the filter can display:

• Brand identity
• Filter model
• Replacement instructions
• Installation direction
• Filtration information
• Recycling or disposal guidance
• QR codes
• Digital service information

This allows the replacement filter to become part of the branded customer experience rather than remaining a generic internal component.

Glue Potting Sealing Technology

HisoAir applied glue potting technology around the filter media.

Rather than using only small or discontinuous glue points, the potting process creates a more complete interface between the filtration media and its supporting frame.

The design is intended to:

• Reduce potential gaps around the media
• Minimize the risk of unfiltered air bypass
• Improve sealing consistency
• Support more stable filtration performance
• Strengthen the connection between the media and frame

This ensures that filter performance is considered as part of a complete sealed airflow path, rather than relying only on the specification of the filtration media.

Design for Cost and Manufacturing

HisoAir evaluated the filter from both environmental and mass-production perspectives.

By reducing unnecessary molded parts and selecting a production-friendly sealing process, the proposed structure helps control:

• Tooling investment
• Component cost
• Assembly complexity
• Development lead time
• Future replacement-filter cost

This balance is especially important for an emerging brand that needs product differentiation without sacrificing future commercial scalability.

Prototyping and Engineering Refinement

The purifier and filter system remain under development.

HisoAir continues to support:

• Filter prototype development
• Structural validation
• Sealing-process refinement
• Manufacturing feasibility review
• Cost optimization
• Preparation for future production

The project has progressed from an air quality monitoring concept toward an integrated air purification product under development.

The current development work has established a differentiated cylindrical replacement-filter direction that combines reduced plastic use, flexible branding, more complete sealing, cost control, and manufacturing feasibility.

The purifier remains under development, with HisoAir continuing to support validation, prototyping, engineering refinement, and preparation for future production.

This project demonstrates that filter innovation is not limited to selecting higher-grade filtration media.

A well-developed filter must also consider structural sealing, material selection, replacement cost, branding, manufacturing feasibility, and end-of-life handling.

By combining a paper-based frame with glue potting sealing technology, HisoAir is helping the client develop a filter solution that is more flexible, manufacturing-friendly, and environmentally considered.

The project also highlights HisoAir’s role as an engineering partner for innovative indoor air quality brands, supporting their transition from monitoring air quality to actively improving it through differentiated purification products.