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Ventilation: the Permanent Cure Condensation Is Begging For

Every home makes moisture, cooking, showers, breathing, and a home that cannot exhale turns it into condensation, then mould. Multi Group installs and repairs extractor fans, whole house ventilation and commercial systems across London and Essex, which in the Awaab's Law era is not just comfort, it is compliance.

Extractor fans that actually extract

Half the bathroom fans in London spin without achieving anything: undersized, clogged, or venting into the loft. We fit correctly sized extractors for bathrooms and kitchens, with humidistat and timer controls that run when needed rather than when remembered, ducted properly to outside. Kitchen extraction, hoods and inline fans get the same treatment, moisture and grease leaving the building, not touring it.

Whole house ventilation and PIV

When condensation blooms in corners across the whole property, room by room fans are not enough. Positive Input Ventilation, a quiet unit usually in the loft, gently pressurises the home with filtered air and pushes stale moist air out through the fabric. It is the single most effective fix we install for whole property condensation and mould, transforms musty flats, and typically costs pennies a day to run.

Why this is now a compliance issue

Awaab's Law sets legal timescales for social landlords on damp and mould, and the Renters' Rights Act paves its extension to private rentals. Tribunals increasingly ask not just was the mould cleaned but was the cause addressed, and ventilation is the cause more often than not. Our installs pair with our damp and mould service: diagnose, ventilate, reinstate, document. That file is a landlord's defence.

Commercial ventilation

Kitchens, salons, offices and units need air handled at commercial scale: canopy and extract systems serviced, fans replaced, ductwork cleaned and airflow restored. We maintain systems on planned schedules alongside our air conditioning service, keeping premises comfortable, compliant and free of the lingering smells customers remember for the wrong reasons.

Frequently asked questions

Will a better fan really stop the mould?

If condensation is the cause, correctly sized and controlled ventilation is usually the permanent fix. Our survey confirms the cause before you spend a pound.

What is PIV and does it work?

Positive Input Ventilation gently supplies filtered air from a loft unit, pushing moist stale air out. For whole property condensation it is the most effective cure we fit.

My fan runs but the mirror still steams up. Why?

Common: undersized fan, blocked duct, or venting nowhere. We test actual extraction rates and fix what the last installer skipped.

Are ventilation upgrades relevant to landlord compliance?

Very. Damp and mould duties now carry legal timescales, and documented ventilation improvements are exactly the evidence of cause led action regulators expect.

Do you service commercial extract systems?

Yes, planned servicing for kitchens and commercial premises, with records kept for your compliance file.

Let the building breathe

Fans, PIV and commercial ventilation, sized right and ducted properly. Free survey.

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