Abre num novo separador
Soluções inovadoras para a qualidade do ar

Notícias

Um escritório comercial moderno com grandes janelas e um purificador de ar

Qual a eficácia dos purificadores de ar de teto em grandes espaços comerciais?

Os purificadores de ar de teto são altamente eficazes em grandes espaços comerciais, melhorando significativamente a qualidade do ar interior. Requerem caraterísticas como uma elevada taxa de fornecimento de ar limpo ...
2024-11-27
Notícias
Grupo diversificado de executivos numa sala de conferências

Quais são as estratégias eficazes para atenuar o impacto do aumento dos direitos aduaneiros sobre as importações chinesas?

Com o aumento das tarifas sobre as importações chinesas, as empresas devem adaptar-se diversificando as suas cadeias de abastecimento. As estratégias incluem a exploração de opções de fabrico em países como o Vietname e o México, ...
2024-11-26
Notícias
Diversos trabalhadores montam produtos de alta tecnologia numa fábrica moderna

Quais são os principais passos e desafios na deslocação da produção da China para os EUA?

A deslocalização da produção da China para os EUA apresenta inúmeros desafios e oportunidades. Os principais passos incluem o estabelecimento de novas cadeias de abastecimento, a proteção da propriedade intelectual e a colaboração com ...
2024-11-26
Notícias
Trabalhadores que montam purificadores de ar numa instalação limpa e moderna

Quais são as melhores práticas para o fabrico de purificadores de ar nos EUA?

O fabrico de purificadores de ar nos EUA requer práticas estratégicas como a importação de componentes essenciais, a colaboração com parceiros experientes como a HisoAir e a utilização de tecnologias inovadoras. Este ...
2024-11-26
Notícias
Pessoa que muda o filtro de ar no sistema AVAC

Quais são os passos para mudar o filtro de ar do seu sistema AVAC?

Mudar o filtro de ar do seu sistema AVAC é crucial para manter a qualidade do ar interior limpo e garantir um funcionamento eficiente. Este guia descreve os passos simples para substituir ...
2024-11-26
Notícias
Grande plano de um filtro HEPA ao lado de uma unidade de ar condicionado

Os filtros HEPA podem ser utilizados eficazmente em aparelhos de ar condicionado?

Os filtros HEPA, conhecidos pela sua capacidade de capturar 99,97% de partículas, não são adequados para aparelhos de ar condicionado normais devido à sua elevada resistência ao fluxo de ar, que ...
2024-11-26
Notícias
Três purificadores de ar em diferentes ambientes: átrio de hotel, quarto de hospital, sala de aula.

Como é que se pode personalizar purificadores de ar para hotéis, hospitais e escolas?

Os purificadores de ar podem ser adaptados para hotéis, hospitais e escolas, personalizando caraterísticas como níveis de ruído, taxas de troca de ar e sistemas de filtragem. Os hotéis exigem silêncio ...
2024-11-24
Notícias
purificador de ar de montagem na parede=2

Como pode incorporar a tecnologia UV-C, HEPA e carvão ativado no seu purificador de ar?

Este artigo explora a forma de integrar eficazmente os filtros HEPA, o carvão ativado e a tecnologia UV-C no seu purificador de ar para uma óptima qualidade do ar interior. Filtros HEPA ...
2024-11-24
Notícias
Uma sala de estar moderna com um purificador de ar e um desumidificador

Quais são as principais diferenças entre purificadores de ar e desumidificadores, e qual deve escolher?

Este artigo explora as principais diferenças entre purificadores de ar e desumidificadores, detalhando as suas funções, benefícios e cenários de utilização ideais. Os purificadores de ar melhoram a qualidade do ar interior ...
2024-11-24
Notícias
purificador de ar de montagem na parede 1

Purificadores de ar de parede vs. de secretária: Qual deles deve escolher?

Escolher entre purificadores de ar de secretária e de montagem na parede pode ser um desafio. Os modelos de secretária são portáteis, económicos e ideais para utilização doméstica, enquanto as unidades montadas na parede poupam espaço ...
2024-11-24
Notícias
purificador de ar dyson (3)

Onde são fabricados os purificadores de ar Dyson?

Este artigo explora as origens do fabrico dos purificadores de ar Dyson, destacando a sua produção primária na Malásia, juntamente com instalações na China e no México. Discute o ...
2024-11-24
Notícias
purificador de ar alen1 (2)

Onde são fabricados os purificadores de ar Alen?

Os purificadores de ar Alen são produzidos em instalações modernas localizadas nas províncias de Dongguan e Shandong, na China. Estas fábricas utilizam tecnologia avançada e controlos de qualidade rigorosos ...
2024-11-24
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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