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Featured Success Stories

Discover how we partner with leading brands to design, engineer, and manufacture innovative air quality solutions that dominate their markets.
Premium non-RO under-sink water filtration system concept with stainless-steel housing for German home solutions brand

Developing a Premium Non-RO Water Purification Brand for a German Home Solutions Provider

A German home solutions provider with an established heat-pump and professional installation business wanted to expand into premium residential water purification. Its direct-sales model required a product that offered more than conventional filtration: distinctive design, a clear technical proposition, an engaging in-home demonstration and a service model suited to professional installers. HisoAir worked with the client on a customized, non-RO under-sink water filtration concept combining activated carbon fiber (ACF) media, a mineral-retaining approach, stainless-steel styling, premium faucet options and proposed intelligent monitoring and leak-protection features. The collaboration advanced the product strategy and design direction for a target retail segment of €1,600–€3,500. The source brief does not establish that the customized system has completed final validation or entered mass production.
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Under-sink water filtration system with dual filters, plumbing pipes, and fittings inside a wooden cabinet space.

U.S. Water Industry Expert Enter Residential PFAS Filtration with a Low-MOQ Platform

A U.S. water treatment professional with more than 30 years of experience sought to translate his industrial water expertise and established industry audience into a residential drinking-water business. He needed a credible PFAS filtration solution without the inventory exposure of a large first order. HisoAir introduced its certified under-sink filtration platform, featuring a Size 6 carbon block cartridge, convenient twist-lock replacement and a low-MOQ entry approach. The client ordered samples for evaluation and expressed interest in a future commercial order; a mass-production purchase has not yet been confirmed.
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Modern kitchen with an open cabinet showing a stainless steel sink and a dual under-sink water filtration system. Accessories include a basket, soap dispenser, and decorative items.

Helping a U.S. Water Treatment Provider Enter the PFAS Filtration Market

A U.S. water treatment provider approached HisoAir to explore a differentiated under-sink filtration offering for homeowners concerned about PFAS and other drinking-water contaminants. HisoAir introduced a certification-backed filtration platform that combines verified product-level claims, installer-friendly design, and a replacement-cartridge business opportunity. The client has ordered samples for technical evaluation and market research.
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Air filter with close-ups showing resin glue application and attachment of filter paper for structural analysis.

Helping a European Innovation Brand Develop a More Sustainable and Better-Sealed Air Purifier Filter System

HisoAir is supporting a European indoor air quality brand in developing a cylindrical replacement filter with a paper-based frame, flexible branding, and glue potting technology designed to improve sealing consistency while reducing plastic use and tooling investment.
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A modern air purifier and a small decorative vase with green branches on a marble-topped nightstand in a well-lit bedroom.

Supporting a Premium Air Purifier Brand in Expanding into the Compact Desktop Purification Market

HisoAir helped an established Australian air purifier brand expand beyond large residential products with a compact, low-noise Air Lite desktop purifier customized for its premium brand identity and local market requirements.
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Close-up view of an air filter with written notes indicating removal date, model number (MN: HA400), serial number (SN: 0703252620243), and the name Harrison Coulter.

Validating a One-Year Filter Replacement Cycle with the HA400 High-Dust Filter in U.S. Military Housing

HisoAir validated the long-life performance of its HA400 high-dust filter through a 408-day real-world field return from U.S. military housing, demonstrating 91% CADR retention and supporting a practical once-a-year replacement cycle for large-scale deployments.
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Two modern interiors showcasing a sleek white wall-mounted air purifier; one in a bedroom and the other in a living room.

Helping a U.S. Allergy and Mold Care Brand Upgrade to High-Performance Wall Mounted Air Purification

HisoAir helped a confidential U.S. air quality brand upgrade from a limited ionization-based product to a high-performance wall mounted air purification portfolio featuring customized silver ion filtration, long-life filters, and commercial-ready automatic operation.
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HisoAir Matter-ready air purifier system featuring smart sensing, intelligence control, and automatic air purification. Multiple device integrations are shown.

Building a Matter-Ready Sense–Think–Act Air Quality System with HisoAir

HisoAir supported a confidential German IoT platform company in evaluating Matter-ready smart air purification devices, white-label platform integration, sensor connectivity, and future Sense–Think–Act air quality system development.
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Compact air purifier with fabric cover on a wooden bedside table near books, glasses, and a remote in a minimal bedroom setting.

Helping a Leading Japanese Consumer Electronics Brand Enter the Air Purification Market with a Matter over Thread Smart Air Purifier

HisoAir helped a confidential Japanese consumer electronics brand enter the air purification market with a compact desktop air purifier platform upgraded with Matter over Thread smart home connectivity and a future-ready IAQ / IEQ sensor roadmap.
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Spacious office with an open layout, featuring desks, chairs, plants, large glass walls, and a ceiling-mounted air conditioning unit.

Creating Healthier Offices with Ceiling and Wall Mounted Air Purification Solutions for a Fortune 500 Workplace

HisoAir helped a confidential Canadian partner create healthier office environments for enterprise workplaces through ceiling mounted air purifiers, wall mounted air purifiers, IAQ and IEQ sensor integration, and data-driven indoor environmental visibility.
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Wall-mounted white air purifier in a modern living room with minimalist furniture, natural light, and a neutral color palette.

Upgrading an Allergy and Mold Care Brand with High-Performance Wall Mounted Air Purification Solutions

HisoAir helped a confidential U.S. allergy care brand upgrade from basic negative ion products to high-performance wall mounted air purification solutions with silver ion filter customization, long-life filtration, smart auto mode, and commercial-ready no-disturbance operation.
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Wall-mounted modern air purifier with a sleek design installed in a minimalist living room featuring warm lighting and neutral decor.

Helping a Leading German Water Heater Brand Expand into Air Purification in Thailand

HisoAir helped a leading German home appliance brand expand from water heating into air purification in Thailand by developing a cohesive mass-premium product lineup based on proven desktop and wall mounted air purifier platforms.
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Richiesta di preventivo
Contaminant Engineering•3 min read

PFAS Water Filtration Technologies Explained: Carbon, Resin & RO

Key Takeaway:

PFAS reduction depends on the specific compounds present, treatment media, contact time, water chemistry, and system design. Activated carbon, ion exchange, and Reverse Osmosis address PFAS through different mechanisms.

PFAS are a large family of persistent fluorinated compounds that can occur in drinking-water supplies. Their treatment behavior varies significantly by molecular structure, chain length, functional group, concentration, and the chemistry of the source water.

Granular Activated Carbon (GAC) removes PFAS primarily through adsorption. It is generally more effective for many longer-chain PFAS, while shorter-chain compounds tend to break through more quickly. Carbon performance depends on media properties, Empty Bed Contact Time (EBCT), competing organic matter, loading, and replacement frequency.

Ion-exchange resins use charged functional sites to capture many PFAS compounds. Properly selected anion-exchange media can provide high capacity and may perform better than conventional activated carbon for some shorter-chain PFAS, although performance still depends on water chemistry and competing ions.

Reverse Osmosis (RO) uses membrane separation rather than adsorption. Properly designed RO systems can provide broad reduction across many PFAS compounds as well as dissolved salts and other contaminants. Unlike carbon or resin, however, RO also produces a concentrate stream that must be managed.

No single technology should be selected from a PFAS label alone. System design should consider which PFAS compounds are present, their concentrations, required reduction targets, flow rate, media life, and the applicable third-party certification or validation requirements.

HisoAir Water Technical Series
Product Discovery•3 min read

How to Choose an Under-Sink Water Purifier for Modern Kitchens

Key Takeaway:

Match the treatment technology to your water quality first, then evaluate cabinet space, faucet configuration, flow rate, drain and power requirements, and filter replacement needs.

Choosing an under-sink water purifier starts with water chemistry. Carbon filtration is well suited to chlorine, taste, odor, and many organic contaminants, while Reverse Osmosis is more appropriate when dissolved salts, fluoride, nitrates, or broader dissolved contaminants need to be reduced.

For compact kitchens, tankless RO systems eliminate the conventional storage tank and can significantly reduce the space required under the sink. However, membrane capacity stated in GPD does not directly equal faucet flow. When comparing systems, check the actual dispensing flow rate, inlet-pressure requirement, recovery ratio, and whether a booster pump is required.

Installation architecture also matters. Many RO systems require a drain connection, electrical power, and either a dedicated drinking-water faucet or a compatible multi-function faucet. High-flow carbon systems can often connect directly to the existing cold-water line with a simpler installation, but pressure drop and available faucet flow should still be verified.

RO also removes much of the naturally occurring dissolved mineral content. Where taste or mineral balance is a priority, a post-RO remineralization stage can be added. Filter life should be evaluated by both rated capacity and local water quality rather than replacement time alone.

The right system is therefore not simply the smallest or highest-GPD model. It is the configuration that matches the target contaminants, available cabinet space, desired faucet setup, peak dispensing demand, and maintenance expectations.

HisoAir Water Technical Series
Water Quality•2 min read

What Does TDS Mean in Drinking Water? Measurement vs Contaminant Reality

Key Takeaway:

A TDS meter estimates the overall concentration of dissolved ionic substances from electrical conductivity. It cannot identify specific contaminants or determine whether water is chemically safe.

Total Dissolved Solids (TDS) refers to the combined concentration of dissolved substances in water. Most handheld TDS meters do not measure TDS directly. Instead, they measure electrical conductivity (EC) and convert that reading into an estimated parts-per-million (ppm) value.

This means a TDS reading can indicate how much dissolved ionic material is present, but not what that material actually is. Calcium, magnesium, sodium, nitrates, and other dissolved ions can all contribute to conductivity, yet a simple TDS meter cannot distinguish between them.

TDS meters are also not suitable for detecting trace contaminants such as PFAS, many VOCs, pesticides, pharmaceuticals, or disinfection byproducts. These substances may be present at concentrations far below the level needed to noticeably change electrical conductivity.

A low TDS reading therefore does not guarantee safe drinking water, and a higher TDS reading does not automatically indicate contamination. Water-treatment decisions should be based on laboratory testing for specific contaminants of concern rather than TDS alone.

HisoAir Water Technical Series
Technology Selection•2 min read

RO vs UF Water Filtration: Understanding Pore Sizes & Dissolved Minerals

Key Takeaway:

Ultrafiltration can reduce bacteria, turbidity, and suspended particles while retaining most naturally occurring dissolved minerals. Reverse Osmosis provides much broader reduction of dissolved salts and smaller contaminants.

Ultrafiltration (UF) typically uses hollow-fiber membranes with pore sizes in the approximate 0.01–0.1 micron range. These membranes physically retain turbidity, suspended solids, colloids, and many microorganisms while allowing dissolved minerals and salts to remain in the water.

Reverse Osmosis (RO) operates at a much finer separation level. Unlike UF, RO can substantially reduce dissolved ions such as sodium, calcium, fluoride, nitrates, and other contributors to total dissolved solids (TDS). This makes RO more suitable when dissolved-salt reduction is a primary treatment objective.

UF generally requires less system pressure and produces little or no continuous concentrate stream in many point-of-use configurations. RO typically requires greater pressure and produces a reject-water stream, but delivers broader contaminant reduction.

For water with acceptable TDS and mineral content, UF can be a simpler mineral-retaining treatment option. Where dissolved salts, fluoride, nitrates, or broader dissolved contaminants are a concern, RO is generally the more appropriate technology.

HisoAir Water Technical Series
Technology Selection•4 min read

Carbon Block vs Reverse Osmosis: Which Fits Your Need?

Key Takeaway:

Choose RO for dissolved inorganic salts and heavy metals; choose Carbon Block for chemical taste/odor, no wastewater, and high line-pressure flow.

Reverse Osmosis (RO) and Carbon Block filtration represent two fundamentally different treatment methods: membrane separation and adsorption. Understanding these differences helps determine which technology is better suited to a specific water-quality requirement.

Reverse Osmosis uses a semi-permeable membrane with pore sizes of approximately 0.0001 microns. It can significantly reduce dissolved inorganic contaminants such as TDS, fluoride, nitrates, and certain heavy metals. Because water must be forced through the membrane, RO systems require sufficient pressure or a booster pump and generate a concentrated wastewater stream.

Carbon Block filtration relies primarily on adsorption through compressed activated carbon, commonly with nominal pore sizes around 0.5–5 microns. It is highly effective for chlorine, chloramines, VOCs, taste, and odor, while allowing substantially higher direct-flow rates without producing wastewater.

From an operating perspective, Carbon Block systems are generally simpler, require less energy, and avoid the water loss associated with RO. RO involves higher system complexity and operating cost, but provides substantially broader reduction of dissolved contaminants that Carbon Block alone cannot address.

HisoAir Water Technical Series

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