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)]
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