Whole-house, not one room
Unlike a dehumidifier, PIV works across the house at once. That suits homes where condensation shows up on windows, in bedrooms and in corners all over the place.
PIV or dehumidifier?POSITIVE INPUT VENTILATION, HONESTLY
IS PIV WORTH IT
FOR CUMBRIAN HOMES?
Streaming windows and mould in more than one room every winter? PIV can make a big difference in the right house. Here’s how to tell if yours is one of them.
Arrange a free surveyWhat PIV
does well.
A PIV unit sits in the loft and gently pushes filtered air into the home through a ceiling diffuser, usually on the landing. That steady supply dilutes the moist air that causes condensation, and the displaced air leaves through the normal gaps and vents.
Running cost
On normal settings, a modern PIV fan uses little electricity. Units with a built-in heater use much more when the heater runs, so the model and settings make the difference. Ask for the figures for the unit proposed.
Low effort
Once fitted and set up, PIV runs continuously without anyone remembering to switch it on, empty a tank or open a window. Filters need checking and changing as the maker recommends.
Will PIV help
your home?
Good signs PIV will help
- Windows stream with condensation in several rooms most winter mornings
- Mould keeps coming back in bedrooms, corners and behind furniture
- The house smells musty, especially after it’s been closed up
- You already ventilate well and it hasn’t been enough
- There’s a loft with room for the unit and safe access
Signs something else comes first
- A single damp patch that grows after rain
- A tide mark low on ground-floor walls
- A leak from a pipe, roof or gutter
- Bathroom or kitchen extractor fans that don’t work
- A flat or home with no loft space, which needs a different unit
How fitting
works.
Check it suits the house
We look at where the condensation is, the loft, the landing ceiling for the diffuser, existing extraction and any other damp, so PIV is only fitted where it will help.
Fit & set up
The unit goes in the loft, the diffuser in the ceiling and the electrics are connected by a suitably qualified person. The fan speed is set for the size of the home.
Aftercare
You’ll be shown the controls and how to check the filter. We can remind you when it’s due a check.
PIV advice
across north & west Cumbria.
Send your postcode to confirm availability, including nearby towns and villages.
Check availabilityCarlisle & the north
Carlisle, Brampton, Longtown, Wigton
West Cumbria & the coast
Whitehaven, Workington, Maryport, Silloth, Aspatria, Egremont, Cleator Moor
Penrith & the northern Lakes
Penrith, Keswick, Cockermouth
Is PIV worth it?
FAQs.
Does PIV make the house colder?
The air comes from the loft, which is usually milder than outside, and is introduced gently. Some units have a heater to temper the air in cold weather. Positioning the diffuser well avoids a noticeable draught.
Is PIV noisy?
On normal settings, most people don’t notice it. The model, fan speed and installation all affect noise, which is why we set it up for your home.
Can I switch it off at night?
It’s designed to run continuously. Switching it off lets moisture build up again, especially overnight when condensation is worst.
Do I still need my extractor fans?
Yes. Kitchens and bathrooms make a lot of moisture quickly, and extractor fans remove it at the source. PIV works alongside them.
Is PIV worth it in a rented property?
For landlords, the low maintenance is a big advantage: tenants don’t have to do anything for it to work. It still needs the right house and any leaks fixing first.
How long does it take to fit?
Most loft installations are done in a day or less. We’ll tell you what’s involved for your home when we survey.
YOUR HOME. A CLEARER WAY FORWARD.
BOOK YOUR FREE
SURVEY OR QUOTE.
Damp, ventilation or plastering. Tell us what you need and arrange a free, no-obligation survey or quotation.
