BuildingRating

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Glossary of Building Rating Terms

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HDD

供热日气温是每天日平均气温低于给定的温度(18°C或65°F)的气温。此温度点以下时,消费者被假定为需要消耗燃料为空间供热,并根据地域而不同。

Health and Well-Being Benefits

Health and well-being benefits relate to the public health improvements observed as a result of improved heating and cooling of buildings and air quality from more efficient transport and power generation and less demand for both. [Source: IEA Report - Spreading the Net, 2012]

Heat Gains

Heat generated within, or entering into, the conditioned space from heat sources other than energy intentionally utilized for heating, cooling or domestic hot water preparation. [Source: International ISO Standard 13790- Energy performance of buildings- Calculation of energy use for space heating and cooling (2008).]

Heat Pumps

A machine, device or installation that transfers heat from natural surroundings such as air, water or ground to buildings or industrial applications by reversing the natural flow of heat such that it flows from a lower to a higher temperature. For reversible heat pumps, it may also move heat from the building to the natural surroundings [Source: EPBD recast, 2010/31/EU]

Heat Transfer

In contrast with a heat gain, the driving force for heat transfer is the difference between the temperature in the considered space and the temperature of the environment at the other side (in the case of transmission) or the supply air temperature (in the case of ventilation). [Source: International ISO Standard 13790- Energy performance of buildings — Calculation of energy use for space heating and cooling (2008).]

Heat Transfer Coefficient

Heat flow rate divided by the temperature difference between two environments; specifically used for heat transfer coefficient by transmission or ventilation. [Source: International ISO Standard 13790- Energy performance of buildings — Calculation of energy use for space heating and cooling (2008).]

Heat-Balance Ratio

Monthly or seasonal heat gains divided by the monthly or seasonal heat transfer. [Source: International ISO Standard 13790- Energy performance of buildings — Calculation of energy use for space heating and cooling (2008)]

Heated Floor Area

The total floor areas of the building which are designed to be heated to more than 10 degrees celcius, which is limited to the indoor climate. This does not include rooms/spaces that do not fall within the floor area of the building. [Source: GBPN]

Heated Space

Room or enclosure, which for the purposes of a calculation is assumed to be heated to a given set-point temperature or set-point temperatures. [Source: International ISO Standard 13790- Energy performance of buildings — Calculation of energy use for space heating and cooling (2008).]

Heating

Process of adding heat energy causing a rise in temperature or a transfer of sensible heat into latent heat. [Source: ASHRAE]

Heating or Cooling Season

Heating or cooling season is a period of the year during which a significant amount of energy for heating or cooling is needed. The lengths of the heating and cooling seasons are determined in different ways, depending on the calculation method. The season lengths are used to determine the operation period of technical systems or season-dependent user behaviour, for instance on ventilation. [Source: International ISO Standard 13790- Energy performance of buildings — Calculation of energy use for space heating and cooling (2008).]

Heating systems

A system in which heat is transferred from a source of energy through a distribution network to spaces to be heated. [Source: ASHRAE]

High Efficiency Cogeneration

High-efficiency cogeneration means cogeneration meeting the criteria laid down in Annex II. [Source: EU Directive 2012/27/EU on Energy Efficiency]

Holistic Approach

Combines integrated design with regulatory mechanisms, labelling schemes and financial incentives to reduce energy consumption in the buildings sector. The holistic approach means being flexible towards building design, adaptive to changing technologies and responsive to local environmental and socio-economic contexts. [Source: IEA Glossary]

Hospitals

A hospital can be defined as a medical centre that provides medical, surgical and nursing care. This includes public and private hospitals, medical care, homes for handicapped, day nursery and others. [Source: BPIE]

Hotels and Restaurant

A hotel or restaurant can be defined as a commercial establishment providing meals and or accommodation and other guest services. This includes hotels, restaurants, pubs and cafes, canteens or cafeterias in businesses, catering and others. [Source: BPIE]

HVAC systems

HVAC systems are comprised of the heating, air conditioning, and ventilation systems in a residential or commercial building. These mechanical systems provide thermal comfort and air quality in indoor spaces. Types of HVAC systems include air conditioners, heat pumps, furnaces, boilers, rooftop units, chillers, and packaged systems. A building’s HVAC system encompasses components such as duct work and air handlers which are essential to system performance. [Source: ACEEE Glossary]