Mould & Damp.

Mould and damp is not simply a cosmetic issue — it is a symptom of excess moisture within a building. Left untreated, damp and mould can affect indoor air quality, damage building materials and negatively impact occupant health.

Mould is a type of fungus that reproduces by releasing microscopic spores into the air. These spores are naturally present in indoor and outdoor environments, but when they encounter the right conditions, they can rapidly colonise and spread throughout the property, having severe health implications for both the occupants and the building.

Everyday activities such as cooking, showering, drying clothes and even breathing release moisture into the air.

Warm air can hold more moisture than cold air. When humid air comes into contact with colder surfaces — such as windows, external walls or thermal bridges — the water vapour condenses into liquid water. This repeated cycle creates persistently damp surfaces, providing ideal conditions for mould growth.

Without effective ventilation, moisture levels continue to rise, increasing the likelihood of:

Ariosa DOT addresses the cause of mould rather than simply treating the symptoms.

By continuously extracting stale, moisture-laden air and replacing it with fresh, filtered outdoor air, the system helps maintain healthy indoor humidity levels and reduce condensation risk.

The integrated heat recovery core ensures this fresh filtered air is delivered efficiently, recovering heat that would otherwise be lost through traditional ventilation.