- When production replaces consumption.
- The inconvenients.
- The future of positive energy homes.
When production replaces consumption.
As our energy bills continue to rise and natural resources decline, the positive energy home offers us new ecological and economic opportunities. In theory, the concept is simple: it is about producing more energy than we consume. To make your own opinion, this week, HandymanDuDimanche invites you to discover the main lines of the positive energy house.
The design of the positive energy house is based on some simple but effective principles. The building envelope is optimized to prevent heat and energy loss. We will therefore provide quality insulation at the level of walls, floors and attics, double or even triple glazing, and mechanical ventilation with double flow and will limit as much as possible the thermal bridges. The geographical orientation of the house (facade facing south) and the various openings are studied to make the most of the light and the heat of the sun. It will install very economical equipment for heating, appliances or lighting. Finally, the building will generate energy, including solar panels, and redistribute the surplus to an energy supplier.
With the positive energy house, no more painful electricity bills at the end of the month! Thanks to your production, not only will you realize significant savings, but you will also be able to sell the energy you do not use to the supplier of your choice. Profits that will make the purchase of all your facilities profitable after about fifteen years. To help you finance this type of project, many regions offer grants and subsidies to be combined with tax benefits Tax credits: energy savings at any price Ecological, these buildings are almost autonomous, pollute very little and emit virtually no CO2. You will thus gain a healthy and comfortable home to live throughout the year.
The major disadvantage of the positive energy house is the initial investment it claims. Indeed, the latter is high, ten to thirty percent more than a traditional medium-range home. There are also far too few professionals and skilled craftsmen to do this type of work, which increases the time but also the prices while leaving little choice to customers. The same goes for many ecological materials that are not found in France and must be imported, which further increases the final bill. Finally, we observe a lack of decline in our country where this type of installation is very recent.
The future of positive energy homes.
Currently, the hexagon has only a few houses with positive energy, which act as prototypes. For example, you can visit Château-Gontier in Mayenne or discover the Zen house in Savoie. However, we can see an effort on the part of the public authorities, who are setting up new training courses, particularly in the environmental professions. We can therefore hope for a proliferation of qualified professionals in the years to come. In the long term, it seems legitimate to question the maintenance of the facilities, their lifetime (including the inverter), but also the profitability of this investment. At present it is better to ask if this model is viable while the economy and household incomes are at their lowest.
Idealist and promising, the positive energy house represents a great step forward in ecology, despite a purchase price that may discourage most builders. However, it is possible to save natural resources otherwise, such as by monitoring electricity consumption, lowering heating by a few degrees, improving insulation, or using photovoltaic panels.