If you’re dealing with condensation, mould, or stale air in your Winsford home, you’ve likely come across two popular solutions: PIV and DMEV systems.
Both improve ventilation — but they work very differently, and choosing the right one depends on your home layout and moisture levels.
At Weather Wise Solutions, we assess your property first and recommend the system that will deliver the best results for your budget and long-term air quality.
🆚 PIV vs DMEV – What’s the Difference?
Here’s a simple breakdown to help you understand each system:
Positive Input Ventilation (PIV)
✔ Best for whole-house moisture control
PIV uses filtered air from the loft and gently introduces it into the home, pushing stale, humid air out.
Ideal for:
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Condensation on windows in multiple rooms
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Mould in bedrooms or living spaces
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Properties with limited airflow
Benefits:
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Treats the entire home
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Fresh, filtered air supply
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Low running cost
Decentralised Mechanical Extract Ventilation (DMEV)
✔ Best for high-moisture rooms like bathrooms & kitchens
DMEV fans extract humid air directly from the room, preventing moisture from entering the rest of the home.
Ideal for:
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Bathrooms with mould on ceilings
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Steamed-up mirrors and persistent humidity
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Homes where moisture is produced in one or two key areas
Benefits:
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Smart humidity sensors
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Quiet, continuous background extraction
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Boosts when moisture rises
🧠 Which One Do You Need?
At Weather Wise Solutions Limited, we tailor ventilation to your home — not just one-size-fits-all solutions.
You may need:
✅ PIV only – if condensation affects multiple rooms
✅ DMEV only – if humidity is isolated to bathrooms/kitchens
✅ Both systems combined – for properties with widespread moisture and weak airflow
We install trusted systems that comply with building ventilation standards, ensuring long-term moisture control and energy efficiency.
💷 What Do They Cost?
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DMEV installation: cost-effective and ideal for single-room issues
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PIV installation: slightly higher cost but treats the whole home
We always provide transparent pricing and only recommend systems that will work for your home — and we never “oversell”.
🏡 Why Winsford Homeowners Choose Us
As a family-run damp and ventilation company, we’re proud members of the Federation of Damp the Damp Proofing Association and Trust A Trader
Our CPD-qualified specialists provide insurance-backed guarantees on approved ventilation and damp works for lasting peace of mind.
👉 Book your free ventilation assessment in Winsford:
https://weatherwiseuk.co.uk/pages/contact