A filter is a device or component designed to remove particulate matter, contaminants, or impurities from air (or other fluids) within a ventilation system. In the context of UK residential building, retrofits, and extensions, filters are commonly integrated into whole-house ventilation systems (such as Mechanical Ventilation with Heat Recovery, MVHR) and kitchen extractor fans to improve indoor air quality (IAQ) by capturing dust, pollen, and cooking fumes.
Context & Application #
- Whole-House Ventilation (MVHR/MEV): Filters in MVHR systems prevent outdoor pollutants (e.g., PM2.5, pollen) from entering while also trapping indoor particulates before air is exhausted.
- Kitchen Extractor Fans: Grease and carbon filters are often used to reduce odours and airborne grease particles, complying with Part F (Ventilation) of the Building Regulations (2021 edition).
- Retrofit Considerations: When upgrading ventilation in older homes, filters must be selected based on efficiency (MERV or F7+ ratings) and maintenance requirements.
Synonyms #
- Air filter
- Particulate filter
- Pollen filter (in MVHR systems)
Related Terms #
- Mechanical Ventilation with Heat Recovery (MVHR) – A system that extracts stale air, recovers heat, and supplies filtered fresh air.
- Part F (Ventilation) – Building Regulations – Mandates minimum ventilation rates and filter efficiency for new builds and retrofits.
- Indoor Air Quality (IAQ) – The measure of air cleanliness, influenced by filtration.
- Particulate Matter (PM2.5/PM10) – Airborne particles targeted by filters.