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PIV installation
Positive Input Ventilation Systems
PIV systems that ease condensation, mould and stale air, surveyed and installed across Greater Manchester.
Accredited
& approved
Fresher air, less moisture damage
Positive input ventilation gently supplies filtered air into the home, usually from a loft-mounted unit, helping dilute moisture and stale air that drive condensation and mould on cold walls and windows.
This is a ventilation solution, not air conditioning. We survey suitable properties across Greater Manchester, specify the right unit, and install with tidy ducting and a clear handover.
PIV installers
Condensation and air quality, done properly
Ideal for many terraces, semis and flats with loft access where moisture is the problem. We check loft condition, electrics, diffuser location and whether PIV is the right tool versus extract upgrades or other ventilation work.
You'll get honest advice if the building needs a different approach first, insulation quirks, unresolved leaks or extract fans that aren't doing their job.
- 01Loft-mounted PIV units
- 02Ceiling diffusers
- 03Condensation relief
- 04Mould-risk support
Installation process
From survey to fresher air
01 · SURVEY
Home survey
We assess moisture symptoms, loft access and whether PIV is suitable for the property.
02 · SPEC
System specification
Unit, diffuser location and electrics confirmed with a clear written quotation.
03 · INSTALL
Professional install
Loft unit fitted, diffuser finished neatly, system commissioned and explained.
04 · HANDOVER
Handover & aftercare
Filter care and settings covered. Repair and maintenance available when you need it.
Moisture-focused
Built for condensation and stale air, not cooling sales.
Honest suitability
We'll say if PIV isn't the right first step.
Tidy residential installs
Discreet loft units and clean diffuser finishes.
Local & insured
Greater Manchester based, fully insured.
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PIV installs across Greater Manchester
“Black mould on the bedroom window every winter. PIV calmed it down within weeks and the loft unit is quieter than we expected.”
Natalie W · Oldham · PIV
A PIV unit usually sits in the loft and gently supplies filtered air into the home through a ceiling diffuser. That continuous fresh air helps dilute moisture and stale air that contribute to condensation and mould.
Modern units are designed to run quietly in the background. We site and set them carefully; on the survey we'll be honest about loft access, structure and what you should expect to hear.
Often yes, where there's a suitable loft and the moisture problem fits what PIV is good at. We survey first, some homes need extract improvements or other ventilation work alongside or instead.
Book a PIV survey
Tell us about condensation or mould in the home. Free survey, clear quote, no obligation.
