Abre num novo separador
Soluções inovadoras para a qualidade do ar

Notícias

Retrato de Alwen num laboratório moderno

O que faz da Alwen uma especialista em purificação do ar e proteção ambiental?

A Alwen, especialista em purificação do ar com mais de 20 anos de experiência, combina tecnologia inovadora e práticas sustentáveis para melhorar a qualidade do ar interior das casas ...
2024-12-09
Notícias
Instalação de fabrico com trabalhadores a montar filtros de ar

Quais são os principais fabricantes de filtros de ar no México?

A indústria de fabrico de filtros de ar do México está a evoluir rapidamente, com empresas como a Gonher de México a liderar o caminho. A proximidade com o mercado dos EUA e as mudanças no comércio ...
2024-12-04
Notícias
Instalação de fabrico de filtros de ar com ferramentas de precisão

Quanto tempo demora a personalização de um filtro de ar com o fabricante?

A personalização de um filtro de ar demora normalmente 2 a 4 semanas, sendo influenciada pela complexidade do projeto, disponibilidade de material, quantidade da encomenda e experiência do fabricante. A comunicação efectiva é fundamental ...
2024-12-04
Notícias
Uma equipa diversificada que discute o fabrico de filtros personalizados num escritório

Quais são as melhores formas de encontrar fabricantes fiáveis de filtros personalizados?

Encontrar fabricantes de filtros personalizados fiáveis implica avaliar a garantia de qualidade, a comunicação, as capacidades de personalização, a experiência, o custo versus valor e a fiabilidade da cadeia de abastecimento. Plataformas como o Google e o Alibaba ...
2024-12-04
Notícias
purificador de ar ikea staff (2)

Onde são fabricados os purificadores de ar IKEA?

Os purificadores de ar FÖRNUFTIG da IKEA são produzidos principalmente na cidade de Xiamen, província de Fujian, China, conhecida pela sua robusta cadeia de fornecimento e mão de obra qualificada. A empresa é ...
2024-11-27
Notícias
Interior de escritório moderno e luminoso com grandes janelas e plantas

Os purificadores de ar de parede são ideais para espaços de escritório?

Os purificadores de ar montados na parede são ideais para espaços de escritório, uma vez que poupam espaço valioso ao mesmo tempo que melhoram a qualidade do ar. Equipados com funcionalidades avançadas, tais como controlo de ...
2024-11-27
Notícias
wall mounted air purifier ha180 & ha380

Os purificadores de ar de parede são ideais para hotéis?

Os purificadores de ar montados na parede são uma solução ideal para hotéis, oferecendo benefícios significativos, como a melhoria da qualidade do ar interior, designs que poupam espaço e caraterísticas tecnológicas avançadas. Estes ...
2024-11-27
Notícias
wall mounted air purifier ha200 ha400 office

Quais são os 5 melhores purificadores de ar para montagem na parede?

Este artigo analisa os cinco principais purificadores de ar de montagem na parede: HisoAir, Fellowes, Onyx da Surgically Clean Air, MedifyAir e RabbitAir. Cada purificador foi concebido para melhorar ...
2024-11-27
Notícias
Um escritório moderno e uma sala de estar acolhedora com purificadores de ar

Quais são as principais diferenças entre os purificadores de ar de teto e portáteis?

A escolha entre purificadores de ar de teto e portáteis implica compreender as suas principais diferenças. Os modelos de teto são excelentes em ambientes de grandes dimensões, como hospitais e ginásios, integrando-se perfeitamente ...
2024-11-27
Notícias
Uma sala de aula espaçosa e moderna com purificadores de ar e cartazes educativos.

Porque é que os purificadores de ar de teto são ideais para escolas e salas de aula?

Os purificadores de ar de teto são ideais para escolas, uma vez que melhoram a qualidade do ar interior sem ocupar espaço no chão. A sua integração com os sistemas AVAC existentes melhora a ventilação ...
2024-11-27
Notícias
Consultório dentário moderno com equipamento avançado e purificador de ar

Porque é que os purificadores de ar de teto são ideais para consultórios dentários?

Os purificadores de ar de teto são essenciais nos consultórios dentários, proporcionando inúmeras vantagens, como a melhoria da qualidade do ar, a redução dos níveis de ruído e a utilização eficiente do espaço. Estes ...
2024-11-27
Notícias
Interior de escritório moderno e luminoso com purificadores de ar montados no teto

Quem são os 5 melhores fabricantes de purificadores de ar de teto do mundo?

Este artigo destaca os principais fabricantes de purificadores de ar de teto a nível mundial: Surgically Clean Air, HisoAir, Fellowes, HealthyAir e Tracs. Cada marca se destaca em tecnologias avançadas como ...
2024-11-27
Notícias
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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