The Passive House

A Low Energy House (LEH) is any type of house that, through design, technologies and building products, uses less energy from any source than a traditional or average contemporary house. Low-energy buildings typically use high levels of insulation, energy efficient windows, low levels of air infiltration and heat recovery ventilation to lower heating and cooling energy.
The term ‘Passive House’ refers to a specific construction standard for buildings with good comfort conditions during winter and summer, and without a traditional heating or cooling system. A Passive House is a super-insulated, virtually airtight building that is primarily heated by passive solar gain and by internal gains from people, electrical equipment, etc. Energy losses are minimised. Any remaining heat demand is provided by an extremely small source. Avoidance of heat gain through shading and window orientation also helps to minimise any cooling load. An energy recovery ventilator provides a constant, balanced fresh air supply.
The Passive House (PH) concept represents today’s highest energy standard with the promise of dramatically slashing the energy consumed by heating buildings. Strictly speaking, it is a building whose energy consumption does not exceed 15 KWh/m² per annum (K15). The primary energy consumption of the living area cannot exceed 120 kWh/m² per annum (E120) for heating, hot water and household electricity.
This means a dramatic reduction in energy consumption and carbon emissions. The Passive House concept focuses primarily on using energy efficiently and reducing energy consumption.


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