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# How energy performance is calculated?

FOR IMMEDIATE RELEASE

PRLog (Press Release) - Aug. 10, 2010 - This article has been shown in a detailed calculation of energy performance ahead with further clarification. It is calculation sample and not to any specific buildings. EM Energiamärgis  Ltd home page at http://emenergiamargis.ee/kuidas-arvutatakse-energiamargi... energy performance calculations are carried out as an example of the website can also be subject to comment or ask additional questions of the calculations.

Energy performance method of calculation

Building: the existing apartment building
Location: Tallinn
Hot area: 451.6 m²
Year: 1959
Heating solution: district heating

Heating cost:
2006: 86 MWh / a
2007: 97 MWh / a
2008: 73 MWh / a

Hot water consumption:
2006: 21 MWh / a
2007: 24 MWh / a
2008: 20 MWh / a

Electricity consumption:
2006: 3.18 MWh / a
2007: 4.12 MWh / a
2008: 2.363 MWh / a

Degree days in Tallinn 17 ˚ C:
2006 => 3800
2007 => 3761
2008 => 3573

Degree days for a normal Tallinn 17 ˚ C => 4220

HEATING
Reduced measured heat consumption for heating:
2006: 86 * 4220/3800 = 95.505 MWh / a
2007: 97 * 4220/3761 = 108.838 MWh / a
2008: 73 * 4220/3573 = 86.219 MWh / a

0.9 weighting for district heating.
Three-year average is multiplied by a weighting factor years withdrawal and heat consumption for heating:
(95.505 +86.219 +108.838) / 3 * 0.9 = 87.169 MWh / a

HOT WATER
0.9 weighting for district heating.
Three-year average and the weighting factor times the cost of heating hot water heaters:
(21 +24 +20) / 3 * 0.9 = 19.5 MWh / a

ELECTRICITY
Electrical weighting of 1.5.
Three-year average and the weighting factor times the annual electricity consumption:
(3.18 +4.12 +2.363) / 3 * 1.5 = 4.832 MWh / a

Three-year average annual energy use in buildings:
87.169 +4.832 +19.5 = 111.5 MWh / a

The building of energy-weighted annual special use:
111.5 * 1000 / 451, 6 = 246.9 = 247 kWh / (m² • a)

Special use of building energy-weighted class => E [KEK ≤ 201 ≤ 250 kWh / (m² • a)]

EM Energiamärgis OÜ
http://www.emenergiamargis.ee

energiamärgis

# # #

EM Energiamärgis OÜ
http://www.emenergiamargis.ee
info@emenergiamargis.ee

EM Energiamärgis Ltd offers advice and draw up your building energy label.

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 Contact Email : ***@emenergiamargis.ee Source : Erik Meybaum Phone : +37258366444 Address : Tallinn, Harjumaa, Rae vald, Tänav City/Town : Tallinn State/Province : Tallinn Country : Estonia Tags : energy saving, consulting, energiamargis, energiamargise koostamine, konsultatsioon Shortcut : http://prlog.org/10850137
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