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What is a Ground Source Heat Pump (GSHP)?
Last Updated: 28 August 2025A Ground Source Heat Pump (GSHP) is a renewable energy system that extracts heat from the ground to provide heating, cooling, and hot water for residential and commercial buildings. It operates by circulating a fluid through a loop of underground pipes (ground loop) to absorb heat from the earth, which is then compressed and transferred...
What is Gross Space Heating?
Last Updated: 28 August 2025Gross Space Heating refers to the total heat energy required to maintain a building’s internal temperature at a comfortable level, compensating for heat losses through the fabric (walls, roof, floors, windows) and ventilation. It is measured in kilowatt-hours per day (kWh/day) and serves as a key metric in assessing a building’s thermal performance. Context &...
What is the Gross Internal Area (GIA)?
Last Updated: 28 August 2025The Gross Internal Area (GIA) of a dwelling refers to the total floor space measured between the internal faces of perimeter walls. This measurement encompasses all internal areas, including partitions, structural elements, cupboards, ducts, flights of stairs, and voids above stairs. It is expressed in square meters (m²). GIA is a critical metric in the...
What is a Grille?
Last Updated: 28 August 2025A grille is a perforated or slatted cover used to finish off the installation of ventilation systems, typically found at the entry or exit points of ductwork. It serves to prevent debris, pests, or other objects from entering the duct run while allowing air to flow freely. Grilles are commonly used in both internal and...
What are Green Heating Products?
Last Updated: 28 August 2025Green heating products refer to heating solutions that utilise renewable energy sources or highly efficient technologies to provide warmth in residential and commercial buildings. These products aim to reduce carbon emissions, lower energy consumption, and promote sustainability in line with UK Building Regulations and environmental targets. In the UK, green heating products are increasingly adopted...
What is Green Finance?
Last Updated: 28 August 2025Green Finance is a financial approach that prioritises investments in projects and technologies that have a positive environmental impact. This includes funding for energy-efficient building designs, renewable energy installations, and retrofitting existing properties to meet higher environmental standards. In the UK, Green Finance is closely aligned with government policies and Building Regulations, such as Part...
What is a Grease Filter?
Last Updated: 28 August 2025A grease filter is a device designed to capture and remove grease particles from the air, primarily used in recirculating kitchen extraction systems. It prevents grease buildup in ductwork and ensures cleaner air circulation within residential and commercial kitchens. Grease filters are essential components in kitchen ventilation systems, particularly in recirculating setups where extracted air...
What is WTW (Warmteterugwinning)?
Last Updated: 28 August 2025WTW, or Warmteterugwinning, is a Dutch term for heat recovery ventilation (HRV), a system that recovers heat from outgoing stale air and uses it to warm incoming fresh air. In the UK, these systems are often referred to as mechanical ventilation with heat recovery (MVHR). They are highly efficient, reducing energy consumption while maintaining indoor...
What is WRG (Wärmerückgewinnung)?
Last Updated: 28 August 2025WRG, or Wärmerückgewinnung, refers to heat recovery ventilation, a system designed to extract stale air from a building while simultaneously recovering heat from it to warm incoming fresh air. This process significantly reduces energy consumption and improves indoor air quality, making it a sustainable solution for modern homes and buildings in the UK. Understanding WRG:...
What is VMC Double Flux? (Ventilation Mécanique Contrôlée avec Récupération de Chaleur)
Last Updated: 28 August 2025VMW Double Flux, or Mechanical Ventilation with Heat Recovery (MVHR), is an advanced ventilation system that ensures continuous fresh air supply while recovering heat from outgoing stale air. It improves indoor air quality and energy efficiency, making it ideal for modern, airtight homes in the UK. Understanding VMW Double Flux VMW Double Flux, also known...