The energy saving regulation (EnEV) is a German regulation, which stepped on 1 February 2002 into force and which replaced thermal insulation regulations (WSchV) and the heating system regulation (HeizAnlV).

The energy saving regulation defines minimum standard for new and existing residential buildings as well as non--residential building regarding the isolation characteristics and the quality of the equipment technology. The EnEV and the standards taken by it in purchase specify, how the primary energy need, which is be computed final power requirement and the heating energy need and kept which limit values must.

Area of application

The regulation applies in Germany to

• Building with normal interior temperatures (buildings, which are heated after their intended purpose on an interior temperature of 19 degrees Celsius and more and annually more than four months, as well as residential buildings, which are used completely or clearly predominantly for living,
• Building with low interior temperatures (buildings, which are heated less after their intended purpose on an interior temperature of more as 12 degrees Celsius and as 19 degrees Celsius and annually more than four months) including their heater, room air-technical and for drinking water heating serving plants.

Distinctions, to what extent certain requirements are to apply only to new buildings, only to existing buildings or to both, are made in detail in the appropriate sections and with the respective regulations.

The EnEV does not apply to:

• Factory, which serve animal husbandry predominantly
• Wide factory, which must be kept long continuously open
• underground buildings
• Areas, which serve the raising and the sales of plants
• Traglufthallen, cell and similar buildings, which must be developed and divided repeated.

Primary energy need

The primary energy need considers the losses, which result from the production of the source of energy at its source over dressing and transport up to the building apart from the final power requirement for heating and warm water also. For the determination of the primary energy need the final power requirement buildings by the primary energy factor is therefore multiplied. This factor is regionally different, in Germany specifies the EnEV the factor, in Switzerland Minergie. It is attached:

The delimitation of the primary energy need does not apply to buildings, which are heated:

- to min. 70% by warmth from force heat coupling (KWK)

- to min. 70% by renewable energies by means of automatic working boiler (solar energy, environmental energy, terrestrial heat and biomass)

- predominantly by single-shot fire places, for which no rule of the technology are present. Note: In order to promote the use of regenerativ sources of energy, these were better evaluated in the EnEV!

Final power requirement

The final power requirement is the energy quantity, which is needed for the covering of the heating energy need and the drinking water heat requirement including the losses of the equipment technology. The final energy corresponds thereby generally to the quantity fuel oil (litre), natural gas (m or a KW/H) or river (a KW/H), computed by the energy producer.

Heating heat requirement/drinking water heat requirement

The heating heat requirement is the energy quantity, which is transferred e.g. by heating elements to a heated area. For newly built houses according to the energy saving regulation the low-energy building standard with a specific heating heat requirement is demanded to hiss 40-70kWh/(square meter A). The drinking water heat requirement is the energy quantity, which must be supplied to the drinking water for heating up. Losses during the energy conversion (e.g. Losses of the boiler), which is not distribution and other technical losses contained. It is set with some procedures overall with 12,5 kWh/m A. This corresponds to a need of 23 l/Person/Tag.

Transmission heat loss

The transmission heat loss comes off by heat transfer and for the determination of the losses of energy of an area or a building is intended. For the computations the DIN EN 12831 (as replacement for the DIN 4701) with national appendix is decisive.

See also

• Energy standard
• Passive house

Related links

• EnEV on-line portal
• DIN standards and materials to the EnEV
• Mag@zin: Everything approximately around the energy saving regulation (EnEV)
• Is the 3-Liter-Energiesparhaus

Articles in category "Energy saving regulation"

We found here 13 articles.