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Passive and comfortable construction – Isover Multi-Comfort house

Thanks to a choice of very high performance components – optimal thermal insulation, super-insulating windows, excellent air sealing, heat recovery system – the Saint-Gobain Multi-Comfort home can do without any active heating mode. Its main sources of heat are sun and heat recovered from recycled air: renewable and inexhaustible natural sources of energy. Alongside its energetic sobriety, the Saint-Gobain Multi-Comfort home offers extreme comfort for its occupiers: interior air quality, thermal and acoustic comfort, visual comfort and light.

The ISOVER Multi-Comfort House ...

  • derives from the passive house concept (leading to bioclimatic design)
  • is sustainable, taking into account environmental, economic and social factors
  • provides the best thermal comfort and related energy savings
  • offers excellent acoustic comfort (according to ISOVER acoustic comfort classes ) and visual comfort, indoor air quality, fire protection and safety
  • allows high flexibility in building design - outside and inside.

... and is core element of ISOVER's Sustainable Development Strategy.

What is a passive house?

The passive house concept was developed in Germany in the 80-ies and is further development of low energy houses. Due to excellent thermal quality of the building envelope (walls, windows, and doors), using the internal heat sources (from all electrical facilities which are normally used in the households) and minimization of ventilation losses with controlled ventilation system with heat recovery – the passive house doesn’t need conventional heating or cooling system. The heating demand is less than 15kWh/m²y which is less than 90% of average.

The houses built in moderate climate should pursue following scenario: U-values of all the constructions of the building envelope should be app. at 0.1 W/m²K and the windows and doors should have U-value at 0,8 W/m²K including frame. To minimize the summer overheating the shadowing and the possibility for natural night ventilation should be planned.
For hot countries U-values of all the constructions of the building envelope should be between 0.3 and 0.45 W/m²K and the windows and doors should have U-value at 1.1 W/m²K including frame. To minimize the summer overheating the shadowing and the possibility for natural night ventilation should be planned.
For cold countries U-values of all the constructions of the building envelope should be app. at 0.07W/m²K and the windows and doors should have U-value at 0.6 W/m²K including frame. In some areas it could be necessary to minimize the summer overheating by shadowing the windows.

The passive house standard implies that next to no active supply of heat is necessary any more. The house’s main heat sources are the sun, its occupants, household appliances and heat recovered from the exhaust air. How is this possible? First and foremost, due to the “passive” components, for example thermal insulation windows, heat exchange systems and efficient insulation. The passive house standard fulfils today the energy efficiency requirements for tomorrow.

What are the advantages of the ISOVER Multi-Comfort House?

The ISOVER Multi-Comfort House offers a wealth of advantages:

  • the most important advantage for user is the comfort – all construction surfaces have similar temperature, there is no air convection and due to controlled ventilation the air quality in the building is excellent.
  • reducing the heat energy demand by the factor 10 (average of European houses have a heat energy demand about 160 kWh/m²a and ISOVER Multi-Comfort House has 15kWh/m²a)
  • CO2 pollution is also reduced by the factor 10

How does a Multi-Comfort House provides permanent fresh air?

Completely different from traditional window ventilation, the air in the Multi-Comfort House always remains fresh automatically, thanks to the Controlled Ventilation System . An air flow, produced with a minimum of energy, is permanently circulated through all rooms – virtually soundless and imperceptible.
The controlled ventilation system with heat recovery is usually planed on the way that the warm exhaust air is collected in the kitchen and the bathroom and is conducted to the recuperation. The fresh air from outside is “preheated” through the earth collector and get in the indoor heat exchanger the last “touch” of energy. On this way could the temperature of the fresh air increase from eg -10°C to eg +14°C or even higher.
The preheated fresh air is conducted directly to bedrooms and living room and indirectly to kitchen and bathroom again

What are the conditions of success?

The excellent thermal insulation of the construction parts, windows and doors is as much important as the attention paid to avoid thermal bridges and air-tightness of the construction. There is no restriction in shape and architecture but it is easier to achieve the passive house level with compact shape.
A very important matter is the quality of installation on the building site.

Download the multi-confort house documentation