Mould and Condensation
Why does mould return after cleaning and repainting?
Cleaning removes what is visible on the surface. If the conditions that allowed growth remain, the same surfaces stay at risk.
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Educational resource platform
ONYX NOVA Knowledge Centre
Practical, engineering-led explanations of humidity, condensation, ventilation and indoor air quality in the UAE — written to help you understand your property before anything is specified.
Why we publish this
Understand your property before anything is specified.
Humidity, condensation and ventilation are engineering subjects, not product features. These articles explain the mechanisms behind what you are experiencing, in plain language and without unverified figures.
Technical note: Final equipment selection and expected performance depend on site conditions, system design, outdoor-air conditions and professional assessment.
Categories
Featured articles
Start here.
Humidity Basics
Why is my home humid while the AC is running?
Air-conditioning is designed primarily to control temperature. Moisture removal is a by-product of cooling and varies with conditions.
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Humidity Basics
What is a comfortable indoor humidity level in the UAE?
A comfortable, stable humidity band is defined per property. This article explains what the target depends on rather than quoting a single number.
Read article4 min read
Humidity Basics
Dehumidifier versus air conditioner: what is the difference?
Both treat air, but they are controlled by different variables and are designed for different outcomes.
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Product Guidance
Core versus Aero: which system is appropriate?
Core is recirculation-led with controlled fresh-air mixing. Aero is fresh-air-oriented with integrated energy recovery.
Read article6 min read
Latest articles
All articles.
Mould and Condensation
Why does mould return after cleaning and repainting?
Cleaning removes what is visible on the surface. If the conditions that allowed growth remain, the same surfaces stay at risk.
Read article5 min read
Humidity Basics
Why is my home humid while the AC is running?
Air-conditioning is designed primarily to control temperature. Moisture removal is a by-product of cooling and varies with conditions.
Read article5 min read
Humidity Basics
What is a comfortable indoor humidity level in the UAE?
A comfortable, stable humidity band is defined per property. This article explains what the target depends on rather than quoting a single number.
Read article4 min read
Humidity Basics
Dehumidifier versus air conditioner: what is the difference?
Both treat air, but they are controlled by different variables and are designed for different outcomes.
Read article5 min read
Fresh Air and Ventilation
How does outdoor fresh air increase indoor humidity?
Fresh air is necessary for indoor air quality. Untreated, outdoor air in the UAE also carries a significant moisture load indoors.
Read article5 min read
Product Guidance
Core versus Aero: which system is appropriate?
Core is recirculation-led with controlled fresh-air mixing. Aero is fresh-air-oriented with integrated energy recovery.
Read article6 min read
Dehumidifier Design
Why duct sizing matters for a concealed dehumidifier
A concealed unit performs as designed only when the ductwork it is connected to allows the intended airflow.
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Mould and Condensation
What causes condensation around AC diffusers?
Water forming at or around a diffuser indicates that surfaces are reaching the temperature at which moisture in the air condenses.
Read article4 min read
Villa Design and Renovation
When should humidity control be planned during villa construction?
The most straightforward stage is while services are being coordinated, before ceilings close.
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Maintenance
How often should dehumidifier filters be replaced?
Replacement intervals depend on the configuration supplied and the conditions the system operates in, and are confirmed in the service schedule.
Read article4 min read
Related products
Systems referenced in these articles.
- ONYX Core 48Concealed ducted dehumidification and air treatment
- ONYX Core 70Concealed ducted dehumidification and air treatment
- ONYX Core 120Concealed ducted dehumidification and air treatment
- ONYX Aero 70Fresh-air treatment, ventilation and dehumidification with total-heat recovery
- ONYX Zenith 168Higher-capacity ducted dehumidification
- ONYX Zenith 240Higher-capacity ducted dehumidification
Related solutions
Solutions by problem.
- Offices and WorkspacesDedicated humidity control and air treatment that work alongside the office HVAC system.
- Shops and ShowroomsStable humidity for sales floors, displays and storage areas.
- Warehouses and StorageMoisture control planned around the stored goods and how the facility operates.
- Selected Commercial and Specialised SpacesApplications reviewed individually before anything is proposed.
- Recurring Mould and CondensationWhen cleaning and repainting is not enough, the conditions behind the problem remain.
- High Indoor HumidityThe room is cold, but the air still feels damp.
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