Mould and Condensation Control for London Homes and Properties

What Causes Condensation and Mould in Your Property?

Condensation forms when warm, moist air meets a cold surface, depositing water. Everyday activities, cooking, showering, drying clothes, and even breathing, all generate moisture that must be adequately vented from the building. Poor ventilation and inadequate heating control are the two most common reasons this moisture is not properly managed.

When ventilation is poor or insufficient, moisture settles on cold surfaces such as windows, external walls, and ceilings. Over time, this leads to:

• Black or green mould growth on walls, ceilings, and furnishings
• Damp or musty smells throughout the property
• Damage to clothing, soft furnishings, and decorative finishes
• Deterioration of the building fabric if left untreated

Many properties, particularly flats and older homes, lack adequate ventilation. Extractor fans may be absent or ineffective, and windows cannot always be left open for security or safety reasons. A dedicated condensation ventilation system is often the most reliable long-term solution.

How Does Condensation Treatment Work?

Kenwood’s condensation treatment improves airflow through the property,  removing damp, moisture-laden air and replacing it with fresh, filtered air. This directly addresses the root cause of condensation rather than simply treating the visible symptoms.

Our systems are fully automated and require no input from occupants once installed. This makes them particularly effective in tenanted properties where the owner does not live on site.

Installation is typically completed within one day. We use specialist diamond cutting equipment to minimise impact on external renders and brickwork, and high-level dust extraction so the property can remain occupied throughout. On completion, you will receive an electrical certificate and a Kenwood certificate of guarantee.

Which Condensation Ventilation System Do You Need?

Kenwood offers a range of condensation ventilation systems to suit different property types and moisture levels. Our surveyor will assess your property and recommend the most appropriate solution.

For Kitchens and Bathrooms: The Kenwood Humidivent System

The Kenwood Humidivent is a humidity-controlled extractor unit designed for kitchens, bathrooms, and utility areas in domestic properties.

Unlike standard extractors, which rely on occupants switching them on and off, the Humidivent is fully automated. It continuously monitors moisture levels and boosts extraction automatically when humidity rises, such as during or after a shower.

Key benefits:

• Low-cost, single-room condensation treatment
• Fully automated with no user controls required
• Responds to moisture in real time to prevent mould growth
• Minimal maintenance required

For Bedrooms and Living Rooms: The Kenwood Heat Recovery System

Where condensation is present in a bedroom or living room, a standard boost extractor is unsuitable due to noise and heat loss. The Kenwood Heat Recovery Ventilator is the recommended condensation treatment for these spaces.

It provides quiet, continuous trickle ventilation while recovering up to 80% of heat from the extracted air, keeping running costs low and maintaining a comfortable indoor temperature.

Key benefits:

• Near-silent operation, suitable for bedrooms
• Up to 80% heat recovery, reducing energy costs
• Introduces a continuous supply of tempered, dry air
• Compact and unobtrusive installation

For Flats: Kenwood Positive Input Ventilation System

Where condensation affects multiple rooms throughout a flat, the Kenwood Positive Input Ventilation System provides a whole-property solution for controlling mould and condensation.

A unit is installed in an external wall and provides a continuous supply of fresh, filtered air to the property. This displaces and dilutes moisture-laden air, which exits via Kenwood Passive Ventilators installed elsewhere in the flat. In cooler weather, an automated temperature sensor gently tempers the incoming air to reduce heat loss.

Once installed, the system requires no manual operation,  making it ideal for tenanted properties.

 

For Houses: Positive Input Ventilation with Loft Unit

For houses with a loft or attic, Kenwood’s whole-house positive input ventilation system operates on the same principle as the flats unit, with one key advantage: the control unit is concealed within the loft space, with only a discreet ceiling grille visible, typically positioned on the landing.

This provides an unobtrusive, highly effective condensation treatment for larger properties experiencing widespread moisture issues.

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Why Choose Kenwood for Condensation Treatment?

Kenwood has been solving condensation and damp problems in London properties for decades. We combine specialist knowledge, proprietary systems, and a property preservation approach that gets to the root of the problem, not just the surface. Here is what you can expect when you work with us.

• Specialist experience with decades of treating condensation and damp in London properties.
• Property preservation approach: We identify and treat the cause, not just the symptoms.
• Minimal disruption, with installations completed within one day while the property remained occupied.
• Proprietary systems: Kenwood-branded condensation ventilation systems, quality-controlled in-house
• Low-energy technology with all systems is designed to keep operating costs to a minimum
• 0% interest-free credit available – subject to status
• Guaranteed all condensation treatment installations are backed by a Kenwood certificate of guarantee
• Trusted by homeowners and landlords – We work directly with occupiers or alongside property managers and builders
• As full members of the PCA (Property Care Association), all Kenwood works are carried out to the highest industry standards.

Frequently Asked Questions About Condensation Control

What is condensation treatment, and do I need it?

Condensation treatment involves installing a ventilation system that removes damp, moisture-laden air from your property and replaces it with fresh, filtered air. You are likely to need it if you have persistent mould growth, a recurring damp smell, or condensation on windows and walls that does not improve with everyday ventilation.

What is positive input ventilation?

Positive input ventilation (PIV) is a whole-property condensation control method that works by continuously introducing fresh, filtered air into the building. This creates a gentle positive pressure that displaces moist air out through natural leakage points and passive ventilators, preventing condensation from forming.

Which condensation ventilation system is best for a flat?

For most flats, the Kenwood Positive Input Ventilation System is the most effective solution. It controls mould and condensation throughout the property without requiring any input from occupants, making it particularly suitable for tenanted homes.

How quickly will I see results after installation?

An improvement in air quality is typically noticeable immediately after the system is switched on. Within approximately 14 days, existing mould growth will dry out and can be removed by washing or painting over. The system then prevents new mould from forming.

Speak to a Condensation Specialist Today

Whether you are dealing with persistent mould, poor air quality, or recurring condensation in a tenanted property, Kenwood’s team is ready to help.

We work with homeowners, landlords, and property managers across London, and can collaborate alongside your builder as part of a wider property preservation or refurbishment project.

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