Sharing Transparency for a More Efficient Future

Glossary of Building Rating Terms

Click a term to see its definition.

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Tailored Energy Rating

An asset rating which uses building-specific, customized input variables, or tailored values, to stimulate and assess energy performance under user-specific conditions. [Source: Institute for Market Transformation]

Tailored Values

Building specific operations data for climate, occupancy, and other inputs used in the simulation of a building's energy performance for an asset rating. [Source: Immovalue]

Technical and Project Risks

Technical and project risks are failures in the project implementation, any consumer change, or technical breakthrough during the implementation phase of the project; [Source: IEA (2010) Money Matters]

Technical Building Subsystem

Part of a technical building system that performs a specific function (e.g. heat generation, heat distribution, heat emission). [Source: International ISO Standard 13790- Energy performance of buildings — Calculation of energy use for space heating and cooling (2008).]

Technical Building System

Technical equipment for the heating, cooling, ventilation, hot water, lighting or for a combination thereof, of a building or building unit. [Source: EPBD recast, 2010/31/EU]

Technical Consultants

The technical consultants are in a broad sense the engineers and technicians commissioned to design technical parts of the building (structure, external works, services, planning/scheduling, etc.) as firms (offices, etc.) or as freelancers (consulting engineer, etc.). [Source: IEA Annex 31 Glossary]

Thermal Bridge

A thermal bridge is a localised area of the building envelope where the heat flow is different (usually increased) in comparison with adjacent areas (if there is a difference in temperature between the inside and the outside). [Source: Passipedia, 2013]

Third Party Financing

A contractual arrangement involving a third party — in addition to the energy supplier and the beneficiary of the energy efficiency improvement measure — that provides the capital for that measure and charges the beneficiary a fee equivalent to a part of the energy savings achieved as a result of the energy efficiency improvement measure. That third party may or may not be an ESCO. [Source: ESD, 2006/32/EC]

Three Litre House

Calculated primary energy consumption for heating and ventilation (DHW not included), using the national calculation standard, corresponding to maximum 3 litres of oil per m2 (~ 34 kWh/m2yr primary energy consumption). (EU Definition) [Source: Concerted Action]

Top Down Models

Models applying macroeconomic theory, econometric and optimization techniques to aggregate economic variables. Using historical data on consumption, prices, incomes, and factor costs, top-down models assess final demand for goods and services and supply from main sectors, such as the energy sector, transportation, agriculture and industry. Some top-down models incorporate technology data, narrowing the gap to bottom up models. [Source: IPCC - Annex I Glossary]

Total Energy

Amount of fuel that is required to operate a building and incorporates energy consumed by the production of electricity as well as losses due to transmission and delivery [Source: IEA]

Total Floor Area

Total useful floor area means the floor area of a building or part of a building, where energy is used to condition the indoor climate. [Source: EU Directive 2012/27/EU on Energy Efficiency]

Town Planner

The town planners are the designers of the layout of the urban areas. [Source: IEA Annex 31 Glossary]

Trade Off

Values are set for each part of the building, but a trade-off can be made so some values are better and some are worse than the requirements. [Source: Laustsen (2009) Energy Efficiency Requirements in Building Codes, Energy Efficiency Policies for New Buildings]

Transmission Heat Transfer Coefficient

Heat flow rate due to thermal transmission through the fabric of a building, divided by the difference between the environment temperatures on either side of the construction. [Source: International ISO Standard 13790- Energy performance of buildings — Calculation of energy use for space heating and cooling (2008).]

Triple Zero House

The annual balance of calculated primary energy consumption is 0. Use of recycled material only (closed material loop). The annual balance of emissions (from energy consumption) is 0. (EU Definition) [Source: Concerted Action]