How A PIV Installation Can Stop Condensation This Christmas
Author
Ian Murray
Date Published
At ClearAir PIV, we see the same pattern every year. When Christmas approaches and the winter weather sets in. Homeowners across the UK begin to notice a rise in condensation, damp, and black mould.
It happens quietly. One morning the windows are wet. A few days later, a musty smell appears. By the week before Christmas, mould begins to form behind furniture or on cold corners of walls.
Christmas creates the perfect conditions for this to happen. The good news is that a PIV system is one of the most effective ways to stop condensation and the resulting black mould.
Why Condensation Spikes at Christmas
Several things happen to affect indoor air quality in December. All of which make condensation far worse than at any other time of year. It’s a problem that we see year after year. The reasons are simple, the solutions are cost effective and energy efficient.
The heating is on for longer
Warm air holds more moisture. When it settles on cold walls and windows, condensation and mould forms fast.
More cooking and baking
Christmas dinners, slow cookers, ovens and kettles all release steam. With windows closed, moisture has nowhere to escape.
Extra people indoors
When families gather, humidity rises sharply. More breathing, more showers, more cooking. All means more moisture in the air.
Windows stay shut
It’s too cold to have the windows open and to ventilate naturally. With no fresh air replacing stale air, humidity builds up and the condensation starts to form.
Furniture is moved, airflow drops
Christmas trees, decorations and rearranged furniture all reduce natural air circulation. Damp pockets form behind units and sofas.
All of these factors creates the perfect storm for condensation, damp and black mould to form in your home. Just in time for your guests arrival at Christmas.
How a PIV Works To Stop Condensation During Christmas
A Positive Input Ventilation System (PIV) introduces a gentle supply of fresh filtered air into your home. It pushes out humid air and regulates moisture levels.
By reducing humidity A ClearAIR PIV unit stops warm air from settling on cold surfaces. The filtered air replaces stale, damp air. This energy efficient system runs 24 hours a day with low running costs.
Mould cannot survive without moisture. A PIV system improves home ventilation and removes the root cause of black mould.
Once installed in the loft space, it protects your home throughout the whole winter period. With no windows being opened, a PIV unit installation also stops cold air entering your home. Keeping your guests warm and the air clear.
Why Now Is the Best Time to Install a PIV Unit
If you want to avoid condensation and black mould this Christmas. The best time to install a PIV unit is before the festive season begins.
We see a spike in damp and mould problems every December. By installing a PIV unit now, you get immediate benefits. You can get your condensation and black mould problems fixed before your guests start to arrive.
Nobody wants a musty, smelly house at Christmas time. With a PIV unit you get:
- Dry windows instead of daily puddles on your windows
- No musty smells, just lovely Christmas ones
- Your guests feel comfortable, not humid.
- Black mould can’t take hold during the coldest, dampest weeks.
A PIV system begins working from the moment it’s switched on. You don’t have to wait weeks to see results. Most of the homes that we install in see a big improvement within days.
If you want a dry, healthy home throughout December, book your installation with the ClearAIR PIV team sooner rather than later.
At ClearAir PIV, we install PIV units across Nottinghamshire, Derbyshire, Yorkshire, Greater Manchester, Leicestershire, Lincolnshire, Cheshire, Staffordshire and the surrounding areas. We still have appointments available before Christmas. Get fresh air this Christmas with ClearAIR PIV.
Hannah B-C
Nov 1, 2025
The service that we received from ClearAir PIV and Steven himself has been excellent. We have been looking into PIV systems for a while as we have had such a problem with condensation on our bedroom windows. As soon as the temperature begins to drop each year the windows are covered. It has ruined the decor around the windows and caused mould to grow on the frames. Having spoken to Steven on the phone I could tell had specialist knowledge in the area. There was no hard sell, just advice. I got him booked in the same week to fit an Nuaire PIV and I’m so glad we did. Fitting was done quickly and cleanly by John who was friendly, well presented and very knowledgeable and experience in ventilation systems. Steven came too to give advice on another issue we had discussed on the phone. Result: NO MORE CONDENSATION!!! I thought it might take a few days to clear the moisture, but the next morning we checked the windows when they would normally be soaked and… nothing! And nothing since! So happy! I’d read in some reviews of the PIV systems that they were noisy and made the landing cold. This is not my experience. I honestly can’t hear it and although the landing may be ever so slightly cooler, the overall temp of the house isn’t effected and it’s not anything I’m concerned about.
Jack Capstick
Oct 2, 2025
Just had a new PIV unit installed by ClearAIR and I can only say positive things. The whole team from Steven to his employees were amazing to work with, since the instalment all our mould has disappeared and I can’t thank the team enough.I highly recommend ClearAIR as they were worth every penny.
Sarah Cocking
Oct 2, 2025
Would highly appreciated Steven at clear air piv. From start to finish he was so helpful and kept us upto date with the installation. We've noticed a massive difference since. Thank you for a great service
Sarah Brent
Oct 2, 2025
Excellent Service and Results! I recently had a new PIV system installed in my home, and I couldn't be happier with the outcome. Communication with Steven was excellent from start to finish — he responded immediately to any queries and kept me informed throughout the entire process. The installation itself was smooth and professional. Since having the system installed, I’ve had no issues with mould or condensation — a huge improvement! I would highly recommend Steven and his company, CLEARAIR PIV Ltd. Reliable, efficient, and effective service.
Lois Green
Oct 2, 2025
Couldn’t recommend Steven enough. From start to finish the communication was amazing and everything was explained so clearly. He was professional, efficient, and made the whole process completely stress-free. The quality of work is outstanding, and it’s clear he really takes pride in what he does. I wouldn’t hesitate to recommend Steven at Clear Air PIV to anyone looking for a reliable and trustworthy service.
FAQs
Why is condensation worse at Christmas?
More heating, more cooking, more people, and closed windows all increase indoor humidity.
Will a PIV unit stop condensation completely?
Yes. By controlling moisture and increasing airflow, a PIV system eliminates condensation and prevents mould from returning.
How long does a PIV installation take?
Most installations take only a few hours with minimal disruption to you and your home.
Is a heated PIV unit better for winter?
Yes. Heated models warm the incoming air for your comfort during colder months.
Will a PIV system stop black mould?
It prevents it from returning by removing excess moisture from your home.