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PIV Systems

Positive Input Ventilation: The cure for condensation.

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Stop Condensation for Good in Suffolk, Norfolk & Essex

Positive Input Ventilation (PIV) is the most effective way to cure condensation and mould in an entire property. It works by creating a flow of fresh, filtered air that gently pressurises the building.

A quiet unit is installed in the loft. It draws fresh air in, filters it, and gently pushes it down into the hallway via a ceiling diffuser. This positive pressure forces the stale, damp, mould-laden air out through the natural leakage points of your home (trickle vents, door gaps, chimneys).

Whole House Solution

Unlike bathroom extractor fans which only treat one room, a single PIV unit treats the ENTIRE house. It runs 24/7 at a very low trickle speed (costing pennies to run).

The only visible part is a discreet diffuser in the hallway ceiling

Benefits of PIV in Suffolk, Norfolk & Essex

Eliminates Mould

By constantly replacing damp air with dry air, the relative humidity never gets high enough for mould spores to germinate.

Improves Health

Filters out pollen, traffic fumes, and dust mites. Essential for asthma and allergy sufferers (clinically proven).

Low Running Cost

Modern EC motors are incredibly efficient. Running a PIV unit typically costs less than £5 per year in electricity.

Is it Noisy in Suffolk, Norfolk & Essex?

No. The unit sits in the loft on anti-vibration mounts. On its standard trickle setting, it is virtually silent. You won't know it's there—except that your windows will be dry in the morning!

What if I don't have a loft?

For flats or apartments without lofts, we install Wall PIV units. These work on the same principle but are compact units mounted on a hallway wall.

Why choose our units?

Nuaire / EnviroVent approved installers
Heater models available (tempers the air)
Extended Manufacturer Protection
Installed in less than 1 day

Breathe Easier in Suffolk, Norfolk & Essex

Say goodbye to streaming windows and damp walls.

Stops Condensation
Removes Mould Spores
Whole Home Protection

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PIV Installation

Checking Whether Ventilation Is the Right Step

What should be ruled out before treating condensation with a PIV unit?

A PIV unit is intended to improve ventilation, not repair a plumbing leak or prevent water entering through a building defect. Before considering one, note where moisture forms and whether it changes with weather or household activity. Check for leaks, damaged external details, and blocked ventilation. Because different damp causes can look similar, have persistent or unexplained wet areas assessed before selecting equipment.

Read about damp inspections →