Reasons for proper heat insulation

Development of energy saving standards in Germany

Ways to achieve these goals

A look into the future

Earth heats up in a speed never seen before

Natural resources come to an end and therefore need to be conserved

Carbondioxide accumulates in the atmosphere faster than it can be recycled by nature

Buildings after 1977 standards

Buildings after 1995 standards

Low energie houses

Passive house

Ventilation Low requirements

Window ventilation

Mechanic exhaust air ventilation

Ventilation with heat recycling

Solar and internal heat savings

Low efficiency

Little efficiencvy

Effective, not yet sufficient

Very efficient

Heating High Middle Low, little adjustable

Not necessary

Maximum yearly thermal heat usage

280 to 180 kWh/m²a

100 to 54 kWh/m²a

70 to 50 kWh/m²a

< 15 kWh/m²a

Oil needed per year

18 to 13 l/m²a

9 l/m²a 5 to 4 l/m²a -

Governmental sponsorship of renovating old buildings with new standards

Governmental sponsorship when building passive houses

Energy saving requirements that have to be fulfilled by newly-built houses

Develop better materials for insulation and airtightness

Build in new window types with gas filling for better insulation of windows

Prevention of constructional thermal bridges

More efficient use of regenerative energies:- solar energy- wind energy- geothermal energy- hydro power

Set even higher standards for newly-built houses