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What is a Fabric First Approach?
Last Updated: 28 August 2025The Fabric First Approach is a design and construction philosophy that prioritises improving the thermal performance of a building’s fabric (walls, roof, floors, windows, and doors) before considering mechanical or renewable energy systems. This approach aims to reduce energy demand, enhance occupant comfort, and achieve compliance with UK Building Regulations, particularly Part L (Conservation of...
What is an Extractor Fan?
Last Updated: 28 August 2025An extractor fan is a mechanical ventilation device designed to remove stale, moist, or polluted air from an enclosed space (e.g., kitchens, bathrooms, utility rooms) to the outside. It is a critical component in maintaining indoor air quality (IAQ) and preventing condensation, mould growth, and pollutant buildup. Types of Extractor Fans Intermittent Extract Fans – Operate...
What is the Extraction Rate?
Last Updated: 28 August 2025Extraction Rate refers to the volume of air removed from a space by a ventilation system over a specific period. It is typically measured in metres cubed per hour (m³/hr) or litres per second (L/s). This metric is crucial for ensuring adequate ventilation in residential and commercial buildings, particularly in areas prone to moisture or...
What is Extract Ventilation?
Last Updated: 28 August 2025Extract ventilation refers to the process of removing air directly from an internal space or spaces to the outside. This can be achieved through natural means (e.g., passive vents) or mechanical means (e.g., extract fans or centralised systems). Extract ventilation is essential for maintaining indoor air quality by removing pollutants, moisture, and odours, particularly in...
What is External Wall Insulation (EWI)?
Last Updated: 28 August 2025External Wall Insulation (EWI) is a method of insulating the external walls of a building to improve thermal efficiency, reduce heat loss, and enhance energy performance. It involves applying an insulating material to the exterior of the building, followed by a protective render or cladding system. EWI is commonly used in residential retrofit projects, home...
What is an External Louvre?
Last Updated: 28 August 2025An external louvre is a vent cover designed to prevent the entry of rain, debris, and pests into ventilation openings while allowing for adequate airflow. It is commonly used in building ventilation systems to maintain indoor air quality and protect structural integrity. In the UK house building, residential retrofit, home renovation, and extension sectors, external...
What is Estate Management?
Last Updated: 28 August 2025Estate Management refers to the comprehensive oversight and administration of residential properties, particularly in the context of social housing. This includes the maintenance, improvement, and day-to-day management of housing estates to ensure they meet the needs of residents while complying with relevant regulations and standards. In the UK, Estate Management in social housing involves a...
What is the Equivalent Area (EA)?
Last Updated: 16 September 2025Equivalent Area is the aerodynamic measurement of an opening, specifically a measure of the aerodynamic performance of a ventilator. It represents the area of a sharp-edged circular orifice through which air would pass at the same volume flow rate, under an identical applied pressure difference, as through the opening under consideration. This metric is crucial...
What is Ella’s Law?
Last Updated: 9 September 2025Ella’s Law, formally known as the Clean Air (Human Rights) Bill, is a proposed UK legislation aimed at establishing a legal right to clean air for all citizens. Named after Ella Adoo-Kissi-Debrah, a nine-year-old girl whose death in 2013 was attributed to air pollution, the law seeks to enforce stricter air quality standards and hold...
What is the Energy Star?
Last Updated: 27 August 2025Energy Star is an internationally recognised certification programme that identifies and promotes energy-efficient products, buildings, and practices. In the UK, it is often referenced in the context of energy-efficient appliances, heating systems, and building materials. While the Energy Star programme is primarily associated with the United States, its principles align with UK Building Regulations and...