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What are Dust Mites?
Last Updated: 22 August 2025Dust mites are microscopic arthropods, typically measuring 0.2–0.3 millimetres in length, that thrive in household dust. They feed on organic matter such as human skin flakes and are commonly found in bedding, carpets, upholstered furniture, and soft furnishings. Dust mites are a significant allergen source, contributing to respiratory issues such as asthma and allergic rhinitis....
What is Ductless MVHR (dMVHR)?
Last Updated: 22 August 2025Ductless Mechanical Ventilation with Heat Recovery (dMVHR) is a ventilation system designed to provide controlled air exchange and heat recovery in individual rooms or small spaces without the need for extensive ductwork. It operates by alternately extracting stale air and supplying fresh air through a single unit, recovering heat from the extracted air to pre-warm...
What is Draught Proofing?
Last Updated: 22 August 2025Draught proofing refers to the process of sealing gaps and cracks in a building’s structure to prevent uncontrolled air leakage, thereby improving energy efficiency, thermal comfort, and indoor air quality. It is a key component of building airtightness and is often implemented in both new builds and retrofits. Draught proofing is particularly relevant in the...
What is Double Glazing?
Last Updated: 22 August 2025Double glazing refers to a window or door unit consisting of two panes of glass separated by a spacer and sealed to create an insulating air or gas-filled space. This design significantly improves thermal insulation, reduces noise transmission, and enhances energy efficiency in buildings. Double glazing is widely used in the UK house building, residential...
What is a Domestic Ventilation Strategy?
Last Updated: 22 August 2025A Domestic Ventilation Strategy is a comprehensive plan designed to ensure adequate air quality and moisture control within residential buildings. It outlines the methods and systems required to achieve effective ventilation, balancing energy efficiency with occupant health and comfort. This strategy is essential for compliance with UK Building Regulations, particularly Approved Document F (Ventilation). A...
What is a Domestic Ventilation Strategist?
Last Updated: 22 August 2025A Domestic Ventilation Strategist is a professional specialising in the design, implementation, and optimisation of ventilation systems within residential buildings. Their role ensures compliance with UK Building Regulations (Approved Document F) while addressing indoor air quality, energy efficiency, and occupant health. Firms such as VENTI Group provide these services, offering tailored solutions for new builds,...
What is a Diffuser Grille?
Last Updated: 22 August 2025A diffuser grille is an internal grille designed to regulate airflow into or out of a room by adjusting a valve mechanism. This valve can be spun open to increase airflow or closed to restrict or stop it entirely. Diffuser grilles are primarily used in multi-room ventilation systems, such as Mechanical Extract Ventilation (MEV) or...
What is the Dew Point?
Last Updated: 22 August 2025The dew point is the temperature at which air becomes saturated with water vapour, leading to the condensation of water into liquid form. This occurs when the air can no longer hold all the moisture it contains, resulting in the formation of dew, fog, or frost, depending on the surrounding conditions. In the UK house...
What is the Department for Energy Security and Net Zero (DESNZ)?
Last Updated: 22 August 2025The Department for Energy Security and Net Zero (DESNZ) is a UK government department responsible for ensuring the country’s energy security, driving the transition to net zero carbon emissions, and promoting sustainable energy policies. It oversees the development and implementation of strategies to reduce greenhouse gas emissions, improve energy efficiency, and support the adoption of...
What is Demand-controlled Mechanical Extract Ventilation (dMEV)?
Last Updated: 22 August 2025Demand-controlled Mechanical Extract Ventilation (dMEV) refers to a single-room mechanical ventilation system designed to continuously extract air at a low “trickle rate” to maintain indoor air quality. It differs from traditional extractor fans by its continuous operation and ability to adjust airflow based on demand, such as during high-humidity activities like showering. dMEV systems are...