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Innovative Air Quality Solutions

Privacy Policy

Introduction

At HisoAir, your privacy is a top priority. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you visit our website or use our services. By accessing or using our site, you agree to the practices outlined in this policy.

Please take the time to review this policy carefully. If you do not agree with the terms, please do not access or use our services.

1. Information We Collect

We collect several types of information to provide and improve our services to you.

1.1 Personal Information

When you interact with us, we may collect personal information that you voluntarily provide, such as:

  • Name
  • Email address
  • Phone number
  • Billing information (if applicable)

1.2 Usage Data

We collect information on how you access and use our website, such as:

  • Your IP address
  • Browser type and version
  • Time and date of visit
  • Pages viewed
  • The time spent on those pages
  • Referring site (if applicable)

1.3 Cookies and Tracking Technologies

We use cookies and similar tracking technologies to monitor the activity on our website and collect certain information. For more details on how we use cookies, please see our Cookie Policy.

2. How We Use Your Information

We use the information we collect in several ways to provide and improve our services:

2.1 To Provide Services

  • Process your requests and orders
  • Communicate with you about our services or respond to inquiries

2.2 For Analytics and Improvements

  • Analyze website traffic and user behavior to improve our content and services
  • Ensure the website operates efficiently and is secure

2.3 For Marketing Purposes

  • Send you newsletters, promotional emails, or other marketing materials, but only if you’ve opted in to receive them
  • Customize advertising and content to make them more relevant to you

2.4 Legal Compliance

  • Comply with applicable laws, regulations, and legal processes
  • Enforce our Terms of Service and Privacy Policy

3. How We Share Your Information

We do not sell your personal information. However, we may share your information in the following ways:

3.1 With Service Providers

We may share your information with trusted third-party service providers who help us operate our website, process payments, analyze data, and perform other functions necessary to our services. These parties are bound by confidentiality agreements and only use your data as necessary to provide their services.

3.2 For Legal Reasons

We may disclose your information if required to do so by law or in response to valid requests by public authorities (e.g., courts or government agencies).

3.3 Business Transfers

In the event of a merger, acquisition, or sale of all or a portion of our business, your information may be transferred as part of that transaction. We will notify you of such a change in ownership or control of your personal data.

4. How We Protect Your Information

We take the security of your personal information seriously. We use administrative, technical, and physical security measures to protect your data from unauthorized access, use, or disclosure. However, no method of transmission over the Internet or electronic storage is 100% secure, and we cannot guarantee absolute security.

5. Your Data Rights

Depending on your location, you may have certain rights over your personal data. These rights may include:

5.1 Access and Correction

You have the right to request a copy of the personal data we hold about you and request corrections if there are inaccuracies.

5.2 Deletion (Right to Be Forgotten)

You can request that we delete your personal data, provided there are no legal obligations that require us to retain it.

5.3 Data Portability

You have the right to request that we transfer your data to another data controller, where feasible.

5.4 Opt-Out of Marketing Communications

You can unsubscribe from marketing emails or other communications at any time by following the unsubscribe link in the email or by contacting us directly.

6. Third-Party Links

Our website may contain links to other websites that are not operated by us. If you click on a third-party link, you will be directed to that website. We strongly advise you to review the privacy policies of any third-party sites or services you visit. We are not responsible for the content, privacy practices, or any other aspect of third-party websites.

7. Children’s Privacy

Our services are not intended for individuals under the age of 13, and we do not knowingly collect personal information from children under 13. If we discover that a child under 13 has provided us with personal data, we will delete it immediately.

8. Changes to This Privacy Policy

We may update our Privacy Policy from time to time to reflect changes in our practices or legal requirements. Any changes will be posted on this page, and the date of the latest revision will be updated at the top of this policy. We encourage you to review this policy periodically for any updates.

Contact Us

If you have any questions or concerns about this Privacy Policy or how we handle your data, please contact us at:

HisoAir Support Team
Email: sales@hisoair.com

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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