What is a passive house ?

What is a passive house ?

Living in a passive house means enjoying a modern house that heats itself in winter and "produces" freshness in summer. In these times of crisis, the concept of passive house with low energy consumption is attracting more and more families. Explanations. Find more articles on the theme: Quotation insulation work

The concept of passive house

The passive house is THE ultimate low-energy house since it is self-sufficient in terms of heating. Recovering the natural energy emitted by the sun and knowing how to conserve it thanks to flawless insulation, it allows its happy owners to make real savings. If the Germans and the Swiss were the first to take an interest, the French seem to take over. According to the ADEME (Environment and Energy Management Agency), building a passive house would represent an investment of 240,000 euros, or 1,818 euros / m2 for 132 m2 of living space. Conventional energies for heating having increased sharply in recent years (gas, fuel, electricity), the investment would therefore quickly pay off!

How does a passive house work?

A passive house has no conventional heating system: no boiler, no air conditioner, not even a stove. Its objective is to maintain a constant and comfortable temperature throughout the year. So how does she heat herself in winter and stay cool in summer? The choice of insulation materials is essential. It all comes down to a tasty balance between heat gain and heat loss. The passive house works a bit like air conditioning but 100% natural. To achieve its goal of self-heating and be considered a passive house, the building must not consume more than 15 kWh per m2 per year. The choice of materials must be considered. It is its insulation system that will transform your house into a passive house.

How to get a passive house?

To limit heat loss, a passive house must be fitted with efficient external insulation and a mechanical ventilation system with double flow. At the same time, to store enough heat, a passive house must have large openings to the outside that are well exposed to the sun's rays. The ideal is to opt for large bay windows on the south side, of the triple glazing type. It is the best possible combination to take full advantage of the natural benefits of the sun. Conversely, on the north side, the walls must have no opening. If this is not possible, opt for small windows but make sure you have excellent insulation (glazing and shutters). In addition, the insulation of the north facing walls will have to be reinforced in order to fight against cold winds.