Ventilation Systems

UK Building Regulations Part F requires all homes to provide continuous background ventilation plus intermittent extract ventilation in kitchens and bathrooms. Modern mechanical ventilation systems—MVHR, positive input ventilation (PIV), and whole-house extract—deliver controlled fresh air while recovering heat or reducing moisture buildup.

MVHR systems recover up to 95% of heat from stale air, making them ideal for airtight new builds and deep retrofits. PIV systems push filtered fresh air from the loft into living spaces, diluting moisture and pollutants. Extract-only systems pull stale air out, relying on background ventilators to supply fresh air. The right choice depends on your home's airtightness, budget, and whether you're building new or retrofitting.

Featured Guide

MVHR Explained: Do You Need Mechanical Ventilation in Your Home?

MVHR (mechanical ventilation with heat recovery) recovers up to 95% of heat from stale air while supplying fresh air continuously. UK costs, Building Regs Part F requirements, and whether your home needs it explained.

All Ventilation Guides

Ventilation Systems Compared

MVHR, positive input, and extract-only: which system for which house?

MVHR Cost UK

Installation costs, running costs, and payback periods for UK MVHR systems.

Positive Input Ventilation

PIV systems: how they work, costs, and when to use them instead of MVHR.