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Thermal requirements .
The thermal requirements for the ISOVER Multi-Comfort House are based on the passive house design principles. These design principles incorporate excellent thermal insulation of the building envelope (including windows and doors), airtight constructions, and ventilation systems with heat recovery for a permanent supply of fresh air. Small additional heating or cooling systems may also be integrated if needed depending on the climate zone. .
Compared to conventionally built houses, the heating or cooling energy demands of a passive house are lower by about 75 %. And in contrast to old buildings, savings amount to as much as 90 %. .
Requirements according to the passive house design principals for moderate and cold climate zones at a glance: . 
. Basically, Central Europe, the major part of North America and some parts of Central Asia have moderate climates. The north of Europe, parts of Canada and South America have cold climates. .
Requirements according to the passive house design principals for hot climate zones at a glance: . 
. Mediterranean countries and the countries near the equator have a hot climate, but it should be noted that there are differences between hot-dry and hot-wet climates. .
Approximately 90% of the world's population is living in moderate and hot climates.
Generalizations can not be made because of varying landscapes and altitudes.
It is possible to find differing climate zones within the same country. .
ISOVER Multi-Comfort House Principles are defined for every climate. . .
ISOVER Acoustic Comfort Classes .
In addition to thermal comfort and related energy savings, the ISOVER Multi-Comfort House features acoustic comfort and shields the inhabitants from noise. .
According to the European Noise Policy, 80 million EU citizens (20% of the population) are exposed to undesirably high noise levels, which lead to sleep disturbance and other adverse health effects such as: high blood pressure, mental stress, heart attacks and hearing damages. .
Furthermore, noise and poor room acoustics can also have a negative effect on learning and working.
Therefore, ISOVER has defined the ISOVER acoustic comfort classes:
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. These acoustic requirements protect inhabitants and users from exterior noise (road traffic, trains, airplanes, etc.), from airborne noise coming from inside the building (conversations, hi-fi, television, etc.), from structure-born noise (footsteps, objects falling on the floor, house hold equipment, etc.) and noise from technical equipment (heating and ventilation systems, elevators, water pipes, etc.).
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Concept 