Positive input ventilation (PIV) in Derry

For a typical Derry semi or terrace, a loft PIV unit is often the quickest way to dry the house out.

For positive input ventilation (PIV) in Derry, send us the postcode, a few photos and a rough idea of the rooms involved. We will tell you what we would fit and roughly what it costs before arranging a visit.

How we approach PIV in Derry

Many units have a temperature sensor that reduces the flow or switches to a heater module on cold days, so the incoming air does not feel like a draught. Flats without a loft use a wall-mounted unit that draws air from outside through a cored hole.

Guide prices in Derry

Northern Ireland rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job. Travel is quoted separately for this area.

When to get it looked at

• Black mould on window reveals and in corners of bedrooms
• Musty smell in wardrobes or behind furniture
• The house feels stuffy and damp rather than cold

Rules that apply in Northern Ireland

Northern Ireland has its own building regulations, with ventilation guidance in Technical Booklet K. Extract rates follow the Northern Ireland guidance and are measured at handover.

PIV near Derry

• Strabane
• Limavady

More services in Derry

• Landlords
• Commercial ventilation
• Kitchen extraction
• Duct cleaning
• Repairs
• Everything in Derry