Positive Input Ventilation (PIV)

What Is Positive Input Ventilation (PIV)?

Positive Input Ventilation (PIV) is an energy-efficient system designed to improve indoor air quality by reducing excess moisture and preventing condensation. 

How Does PIV Work?

PIV units continuously push fresh, filtered air into your home, usually from the loft or a wall-mounted unit. This steady airflow:

  • Reduces humidity levels inside your home

  • Expels stale, moisture-laden air

  • Prevents condensation from forming on cold surfaces

  • Limits the growth of mould and mildew

By removing excess moisture at the source, PIV protects both your property and your family’s health.

How does PIV cause the problems?

Did you know that 58% of people have suffered mould and condensation in their home? If you consider the fact that 90% of the time is spent indoors, it is vitally important to focus on improving indoor air quality (IAQ). It can damage not just the property, but health as well.

Cooking, cleaning and bathing

These activities generate up to 10 litres of moisture per day. In addition, every load of washing that is hung to dry inside adds an additional 2.5 litres. All together there could be 12.5 litres of moisture generated in the home every single day which can cause condensation and mould.

Volatile organic compounds

Substances like formaldehyde get into the home from things like paint, new furniture and cleaning products. The average person breathes 9,000 litres of indoor air each day, so poor indoor air quality (IAQ) can cause serious risk to health such as heart and respiratory diseases, and asthma being a key concern.

Increased insulation

In the drive to insulate our homes we have created an airtight box where, not just heat, but moisture and chemicals can’t escape. This causes poor indoor air quality, which can contain a cocktail of over 900 chemicals, particles and biological materials, which can have a negative effect on health.
Contact us for Positive Input Ventilation for your Home

Why Choose PIV for Your Home?

Installing a PIV system offers a range of long-term benefits:

  • Improved Indoor Air Quality: Constantly replaces stale air with fresh, filtered air

  • Condensation & Mould Prevention: Stops moisture accumulation and inhibits mould growth

  • Energy-Efficient: Low-energy system that improves ventilation without affecting heating costs

  • Minimal Disruption: Quick, clean installation with little impact on your daily routine

Why Choose PIV for Your Home?
Signs Your Home Could Benefit from PIV

Signs Your Home Could Benefit from PIV

Consider a PIV system if you notice:

  • Damp patches or water droplets on walls, windows, or mirrors

  • Persistent mould in corners, cupboards, or behind furniture

  • Musty smells or poor ventilation in rooms

  • Condensation problems during colder months

Contact us for Positive Input Ventilation for your Home