- Understanding Your Issue
What is condensation?
Condensation is excess moisture in the air settling on cold surfaces, often leading to damp and mould—discover how to prevent it.
Homeowners
Protect your family’s health and your property with expert ventilation solutions.
Free Home Surveys
Our domestic ventilation specialists will assess your property, identify ventilation needs and recommend the most effective solution for your home. This service is free, with no obligation.
Award Winning Products
Recognised across the industry for innovation and quality, our ventilation systems are engineered for performance, efficiency and long-term reliability.
Reduces Condensation & Mould
Our tailored solutions help minimise moisture build-up, improving indoor conditions and protecting your property from the damage caused by condensation.
Which? Approved Installers
envirovent is proud to hold Which? Trusted Traders approval for our national installation service.
Why Condensation Happens In Homes
The hidden problem in modern homes.
Modern homes are designed to be warmer and more energy-efficient. Double glazing, insulation, and draught-proofing all help reduce heat loss. But they also trap moisture inside.
Everyday activities like cooking, showering, drying clothes indoors and breathing release moisture into the air. With nowhere to go, this moisture remains in the property, building up on cold surfaces.
The result is condensation, water droplets forming on windows, walls, and ceilings as the warm, humid indoor air meets the cooler external air.
If left untreated, condensation becomes the perfect conditions for mould and damp to grow.
The Real Impacts
What It's Costing You
Condensation isn't just about a misty window. It has real impacts on your health, your property, and your energy bills.
When stagnant moisture lingers in the air, it encourages black mould to spread on walls and ceilings. Spores from this mould can aggravate asthma, trigger allergies, and make everyday living uncomfortable.
Damp walls and surfaces also damage your home. Wallpaper peels, paint bubbles, and woodwork can warp or rot. Over time, these repairs become costly.
And because damp walls don’t hold heat well, your home will feel colder. This often means turning up the thermostat more often — increasing your energy bills without actually warming the house.
The Real Impact of Condensation and Mould
0-48 Hours
Mould can appear
0
Pints of moisture per week (everyday moisture build-up)
0%
Damp issues are caused by condensation and mould
Our Ventilation Systems
Adequate ventilation ensures that the air inside your home changes frequently enough to avoid it getting stale, stagnant, or lingering around long enough to create condensation and mould issues. All of our ventilation systems ensure quiet running so once installed, you can forget about them working away in the background.
Benefits to installing an extractor fan or a whole-house (PIV) ventilation unit:
Reduce condensation levels in your home
Help prevent mould formation
Improve overall indoor air quality
Save on energy bills by reducing heating costs
Extend paintwork and décor longevity
Reduce CO₂ levels (helpful for those working from home)
Prevent damp air moving around the property
Reduce radon levels
Support overall health and sleep
Issues with condensation, damp or mould?
Understanding what’s causing them in your home is essential to protecting both your property and your health. If you’re dealing with condensation, damp or mould, you’re not alone — thousands of households across the UK experience the same issues every year.
Problems like condensation and mould can affect any property, old or new. What matters is understanding the cause and knowing the steps that can help reduce it.
Find the right ventilation product for your home
Explore our range of PIV, extractor fans, and MVHR. Or get expert advice, system design support and compliance guidance for your property or project.
ATMOS®
The ATMOS® range are loft mounted Positive Input Ventilation (PIV) systems that are designed to reduce mould and condensation and improve indoor air quality within a property.
Improves Indoor Air Quality10-Year WarrantySimple InstallationView The Product
CYCLONE 8
The CYCLONE 8 is a continuous running extractor fan suitable for WCs, bathrooms, utility rooms and kitchens. It is a major advancement in extractor fan technology; it utilises a centrifugal impeller and our Intellitrac technology which ensures extremely high airflow performance and humidity levels are controlled all year round.
High Airflow Performance Low Noise LevelsCartridge SystemView The Product
ATMOS® WALL
The ATMOS® WALL range are wall mounted Positive Input Ventilation (PIV) systems that are designed to reduce mould and condensation and improve indoor air quality within flats or apartments.
Improves Indoor Air QualityDifferent Control Options Available5 or 10-Year WarrantyView The Product
energiSava® 260
The energiSava® 260 is a mechanical ventilation with heat recovery unit incorporating an EC motor, providing optimum ventilation for a property with a minimum loss of energy.
Low Specific Fan Power (SFP)High Airflow PerformanceHigh Thermal EfficiencyView The Product
What our Customers Say
See how our expert teams and solutions help customers tackle mould and improve indoor air quality.
Condensation/Mould think about installing... envirovent
If you have an issue with condensation, mould build up or ventilation issues then envirovent are the company to go to. I have been using their services for 10 years and have had a number of my rental properties surveyed by envirovent where they come up with a solution to eradicate mould issues by creating extra ventilation methods or better ventilation.
Landlord in Croydon
Great system which solved many years of mould issues
We have suffered condensation mould and running water on our windows for over 40 years. We have tried numerous products to remedy this and never really succeeded. In a matter of days of having this system fitted our problems have been solved. Really pleased. Great service, a brilliant system couldn’t ask for anymore.
Homeowner
Excellent products & service
We are a returning customer to envirovent. We know their systems work to reduce/remove problems with condensation & mould. We would highly recommend their products & all aspects of their service from initial enquiry, through to installation.
Homeowner
Request a Free Home Survey
Once you request a free survey*, one of our local ventilation specialists will get in touch to speak to you and discuss your concerns. If ventilation can provide a long term solution, we’ll arrange a convenient time to visit your home.
During the free survey* one of our local ventilation specialists will:
Assess any condensation or mould problems in your property
Take readings of the relative humidity levels
Identify any underlying problems and make recommendations for a long term solution
Free, no-obligation advice for property and homeowners to help improve your home’s ventilation and indoor air quality.
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*Please see additional limitations and fees for the below postcodes and areas
Subject to geographical locations in DG, KA, ML, DD, FK, PH, PA, AB, IV, KW, ZE.
In BT postcodes a £60 fee is applied, which is deductible from the final bill.
In postcodes SS, RM, N, IG, EC, E1 – E9 & E20, CM, SE, SW, NN, NG31-34, PE, IP, NR, CB, CO, LE & SG we are unable to provide an in person survey, please contact us at domestic@envirovent.com or 01423 810 810 to discuss options available.
Advice for Homeowners
Our knowledge Hub is your go-to resource for expert guidance on ventilation, compliance, and solving condensation, mould, and indoor air quality issues.
Services to Help Your Property
Experts solutions and support. From surveys and product selection to design, training and installation.
Free Home or Property Survey
Need help with mould or condensation problems - arrange a free survey today
Installation
Our nationwide network of trained engineers are Which accredited
Product Finder
Select the right ventilation product for your home, property or project
Find a Local Specialist Near You
Get expert advice from our ventilation specialists on condensation, mould, products, system design, compliance and training