HS-221: a Revolutionary
Anti -Moisture System
The UK’s quickest, cheapest, safest and most effective solution to rising damp
What is the HS-221 system?
Moisture Stop's HS-221 system is the UK's most effective solution to rising damp. The system uses very low-frequency wave trains to push water molecules down into the subsoil, and tackles the root causes of rising damp at their source.
Install the system on an exterior wall in just a few minutes, without any need for construction, and watch it get to work. The system can dry out interior walls in a matter of weeks, and then provides ongoing protection from unsightly signs and symptoms of damp, and the harmful effects they can have on your health.
To learn more about Moisture Stop's specially formulated anti-moisture system, or to order yours today, get in touch with our team
How does the HS-221 system work?
The HS-221 system emits very low-frequency electromagnetic waves through walls and floors to disrupt the orientation of water molecules and cause them to move downward. This effectively solves moisture problems at their source.
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By pushing water molecules into the subsoil, HS-221 counteracts the effects of capillarity. This is the natural process that causes water to rise through materials in opposition to gravity, and it works due to a combination of surface tension and the adhesive properties of liquids. Other solutions - ranging from anti-mould paint to damp-proof courses and water proof injections - only address the symptoms of damp, but not the cause.
​Why choose HS-221?
HS-221 is the best solution to rising damp for several reasons. It is:
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Cost-effective: HS-221 consumes very little power, using less electricity in a year than a TV does in a single day, even while continuously connected. It can be powered by an external 12V 2A adapter with a 5mm jack, featuring a negative outer connection and offering options for round or flat plugs for 100VAC to 240VAC.
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Reliable: The system comes with a 30-year warranty and a one-year money-back guarantee.
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Fast: The device effectively eliminates capillary moisture from brick or concrete block walls in under 4 months. In older homes with thick walls and no foundation, drying might take up to 9 months. Even in these cases, it is faster than damp-proofing courses or other geomagnetic solutions.
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Convenient: It can be installed without construction and comes in a range of sizes to meet different needs.
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Safe: The electromagnetic pulses generated by the HS-221 spread throughout each room without creating audible noise. The pulses are certified to be safe for the health of animals and plants and do not interfere with electronic devices. By keeping wall moisture between 3% and 6% by weight, HS-221 also avoids excessive drying, which can otherwise damage some construction materials.
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HS-221 is the perfect anti-damp and anti-mould solution. It can prevent mould growth, mildew and other symptoms before they arise, and protect internal walls from condensation damage. Choose the right model for your needs and enjoy the fastest solution available.
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HS-221 PRO +
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The latest HS-221 PRO + model is based on the same electronics as the HS-221 but with an added geomagnetic system. This boosts the system's electrophysical efficiency by 5%. It is both CE-certified and compliant with ROHS regulations, meaning that it contains no hazardous materials.
A notable addition is a wall-mounted relative humidity reader, which connects via Bluetooth to a mobile app available for download on the Apple and Google Play stores. This allows users to conveniently monitor wall humidity evolution using their Apple or Android device.​​
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FAQs about Moisture Stop's HS-221
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Which model should you choose?​
The emission power of the device is customised based on the square footage of the ground floor or basement of your property. Depending on the capacity you need, choosing a larger size may encourage faster drying. Speak to our specialists about your needs for advice on which size will work best for you.
Where should you install the HS-221 system?
Proper placement is essential, as the system relies on low-frequency waves transmitted through walls and floors to dry all the surfaces in your house. Mount the HS-221 directly on a thick exterior or adjacent wall, avoiding intermediate materials like panels, wood, ceramics or marble. Choose the surface with the highest moisture levels for the fastest results.
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Position the HS-221 about 12 inches above the ground and within one metre of a power outlet for optimal results. Make sure the back of the HS-221 is in solid contact with the wall without any gaps. This will ensure effective wave transmission throughout the perimeter and into the interior via partitions, walls and floor screeds.
How can you measure the system’s progress?
It is now possible to measure wall humidity with the HS-221 PRO + system. Follow these steps:
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Download the Rising Damp app from Google Play or the Apple Store.
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Open the app, and click on ‘connect’ to link your device with HS-PRO +. Make sure you have Bluetooth enabled.
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You can now view a relative humidity reading. A red background indicates high humidity, orange for moderate, and green for the correct levels.
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For a new reading, click on “disconnect” to exit the app and open the app again.
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The app records readings with dates so you can easily monitor the drying process.
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Periodically clean the wall that is in contact with the device to prevent salt build-up and ensure readings are accurate.
How can you measure the system’s progress?
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It is now possible to measure wall humidity with the HS-221 PRO + system. Follow these steps:
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Download the Rising Damp app from Google Play or the Apple Store.
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Open the app, and click on ‘connect’ to link your device with HS-PRO +. Make sure you have Bluetooth enabled.
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You can now view a relative humidity reading. A red background indicates high humidity, orange for moderate, and green for the correct levels.
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For a new reading, click on “disconnect” to exit the app and open the app again.
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The app records readings with dates so you can easily monitor the drying process.
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Periodically clean the wall that is in contact with the device to prevent salt build-up and ensure readings are accurate.
Get in Touch Today!
If you think Moisture Stop is right for you and you want to try the HS-221 system for yourself, contact our team to get started!