The Energy Saving Ordinance 2009 as a new challenge for the manufacturers of masonry bricks

››1 Fractional transmission heat losses of a single-family house with heat protection according to ››Table 1

$››2 Heat balance fractions of a building with window ventilation, divided according to energy losses (output) and energy entries (input)$

››2 Heat balance fractions of a building with window ventilation, divided according to energy losses (output) and energy entries (input)

$››3 Heat balance fractions of a building with mechanical apartment ventilation with heat recuperation, divided according to energy losses (output) and energy entries (input)$

››3 Heat balance fractions of a building with mechanical apartment ventilation with heat recuperation, divided according to energy losses (output) and energy entries (input)

››Tabelle 1 Referenzausführung und -anlagentechnik eines Wohngebäudes zur Ermittlung des zulässigen Primärenergiebedarfs gemäß [1]

Arbeitsgemeinschaft Mauerziegel e.V.
Schaumburg-Lippe-Str. 4   I   53113 Bonn   I   Germany
T +49 (0) 22 89 14 93 24   I   F +49 (0) 22 89 14 93 12
argemauerziegel@ziegel.de   I   www.ziegel.de

››Table 1 Reference construction and plant engineering of a residential building to determine the permissible primary energy requirement according to [1]

ComponentPropertyReference constructionExternal wallU-value0.28 W/(m² K)Windows, French doorsU_w-value1.3 W/(m² K)g_⊥-value0.6Roof windowsU_w-value1.4 W/(m² K)g_⊥-value0.6External doorsU-value1.8 W/(m² K)Building element on subsoil/unheated areaU-value0.35 W/(m² K)Roof, uppermost storey deckU-value0.2 W/(m² K)Heat bridge increase∆ U_WB0.05 W/(m² K)Air tightness of building sheathwith tightness test n₅₀≤ 3.0 h^-1Sun protectionno sun protection device provided forHeating systemfuel value boiler improved, interior installation in buildings of ≤ 2 residential units, otherwise outside the thermal sheath, system temperature 55/45° C, central heat distribution system within the thermal sheath, hydraulic compensation, regulated pump – heating pump, static heat areas on external walls, thermostat valves 1 K control accuracyWarming of drinking watercentral via heating, solar plant with flat collectors, indirectly heated accumulator, distribution within the thermal sheath, internal trains, with circulation; alternatively: electrical warming of drinking water centrally in the apartment without storageCoolingno cooling provided forVentilationcentral exhaust air plant, run according to requirement

››Table 4 Heat transition coefficients U_AW of monolithic brick external walls plastered on both sides››Tabelle 4 Wärmedurchgangskoeffizienten U_AW monolithischer, beidseitig verputzter Ziegelaußenwände

››Table 5 U-values of additionally insulated vertically perforated brick external walls with 10 cm heat insulating composite system and different combinations of heat conductivity of insulating material and masonry
››Tabelle 5 U-Werte zusatzgedämmter HLz-Außenwände mit 10 cm WDVS und unterschiedlichen Kombinationen von Dämmstoff- und Mauerwerks-Wärmeleitfähigkeit

On 30 April 2009 the Federal German government promulgated the amendment ordinance for the EnEV (Energy Saving Ordinance) in the Federal law gazette [1]. Thus the fundamentally revised Ordinance comes into force on 1 October 2009. The reduction of the permissible primary energy requirement for heated and, if necessary, cooled buildings of around 30% in comparison to the current Ordinance already revised in 2007 leads – while taking into account the regenerative fraction of heat energy to be used obligatorily now – to a numerically somewhat weaker stiffening of the heat protection of the building shell.

1 Introduction

The brick and tile industry has prepared itself well for this latest round of the CO₂ reduction programme of the Federal German government and can satisfy the market demand both with conventional perforated bricks and with vertically perforated bricks filled with insulating material. Furthermore, these new high thermal insulating products form the basis for sustainable building, for here in particular the low primary energy requirement over the utilization period of a building has a positive influence on the evaluation criteria for sustainability.

Within the scope of the Meseberg...