Choosing the Right PIV Unit for Your Property

Positive Input Ventilation (PIV) units are a proven way to reduce condensation, damp, and mould, while improving indoor air quality. But with different types available, it can be difficult to know which system is right for your property.

Here’s a guide to help you compare the main options and make the right choice.

⸻

Key Types of PIV Units

1. Loft-Mounted PIV Units

• Best for: Houses and bungalows with loft space. • How it works: Draws air from the loft (or directly outside via a duct), filters it, and supplies it into the property through a central ceiling diffuser. • Advantages: Hidden installation, quiet operation, whole-home coverage. • Considerations: Requires loft space and access.

1. Corridor/Wall-Mounted PIV Units

• Best for: Flats and apartments without lofts. • How it works: Installed on a wall or ceiling inside the property, ducted to the outside. Supplies filtered air directly into corridors or central spaces. • Advantages: Compact and suitable for properties without lofts. • Considerations: More visible inside living spaces; careful placement required for best results.

1. Heated vs Unheated PIV Units

• Unheated units: Energy efficient and ideal for well-insulated properties where incoming air isn’t uncomfortably cold. • Heated units: Contain a small heater (typically 300–500W) that tempers cold incoming air. Recommended for older, draughty properties, or where occupant comfort is a priority. How to Choose the Right PIV Unit 1. Property Type • Loft-mounted units are the go-to choice for houses and bungalows. • Wall/corridor-mounted units are designed for apartments and flats. 2. Insulation & Comfort Levels • Well-insulated properties can often manage with unheated PIVs. • Older or draughty homes benefit from heated models for occupant comfort. 3. Occupant Needs • Landlords may prefer heated units in rental properties to reduce tenant complaints about cold air. • Homeowners sensitive to air quality (e.g. asthma sufferers) benefit from models with enhanced filtration. 4. Budget • Unheated units are cheaper to install and run. • Heated units cost more initially but can prevent comfort issues that lead to underuse.

⸻

Final Thoughts

There’s no one-size-fits-all answer when it comes to Positive Input Ventilation. The right unit depends on your property type, insulation level, and comfort requirements.

A properly selected and installed PIV system will not only tackle condensation and mould but also provide long-term protection for your home and health.

⸻

Switch Electrical & Mechanical Services Ltd are specialists in PIV installation — helping homeowners, landlords, and businesses across Newcastle and the North East choose the right solution for a healthier, drier environment.

📞 0191 9052723 📱 WhatsApp: 07388 439427 ✉️ switchtoday@mail.com