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What is a Canadian well?
What exactly is a Canadian well?
The Canadian well is an ecological ventilation device which consists in ventilating a dwelling independently. Based on geothermal energy, its purpose is to bring in outside air and heat or cool the interior of the house by heat exchange between the air and the ground. Incoming air may be up to 10 degrees colder or warmer than outside air. It is a partially underground facility that requires a large site and good climatic conditions. Moist soil is the most suitable since it facilitates heat exchange.
How does it work ?
The operating principle of Canadian wells is based on geothermal energy and the inertia of the earth. A terminal installed outside the house draws in the surrounding air. It is then transported in underground pipes. The basement is where the important step of this ventilation system, heat exchange, takes place. The transported air then becomes warmer or colder. Finally, it is powered by a fan located in the house inside an interior duct before exiting through the air vents arranged in different places.
During the winter season, the outside air is colder than the ground. The Candian well therefore consists in naturally preheating the air which will then be dissipated in the building. On the other hand, during the summer season, the ground is colder than the outside air. As a result, the device distributes cold air, which is naturally cooled by the floor, into the house.
The compositions of a Canadian well
A Canadian well is made up of:
● An air intake terminal: it consists of sucking in air from outside. This air inlet is itself made up of grilles and filters, essential elements for bringing healthy air into the building.
● External conduits: they are laid to a depth of 1 to 2 meters. The air passes through one or more slightly inclined tubes. This slope is essential to eliminate condensation and prevent the accumulation of mold and humidity.
● A bypass: it is designed to "short-circuit" the system between two seasons. Depending on the season, it may be more interesting to bring outside air directly into the home without going through the Canadian well.
● A ventilation system: consideration should be given to installing a single-flow or double-flow ventilation device (VMC). Its role is to optimize the air flow distributed throughout the house.
● A manhole: it makes it easier to inspect the installation if necessary.
What are the advantages of a Canadian well?
Canadian wells are ventilation and heating devices with several advantages.
● A low power device
The Canadian well offers significant long-term energy savings and responds very effectively to the heating, ventilation and air conditioning needs of the house.
With an energy consumption of only 100 watts, Canadian wells can supply 2,000 watts per hour. Its cost is therefore largely offset by lower electricity bills after a few years.
● Clean, quality air
Canadian wells also provide better air quality. It purifies the air by constantly renewing the air inside the building, while being 100 % natural.
Energy is supplied directly from the ground. That is, the energy is not converted, it is only recovered. Thanks to the condensation system, each room receives clean, dry and moisture-free air.
● An ecological and sustainable system
Investing in Canadian sinks also helps protect the environment. It is a geothermal device that does not cause pollution and does not emit greenhouse gases in nature.
Thanks to its extremely low power consumption, users benefit from inexhaustible and completely free cooling and heat. It is also quite possible to combine Canadian wells with heat pumps and solar panels.
● Optimum performance
Installing a Canadian well saves 20 to 60 % energy, depending on the quality of the house's insulation. Therefore, the investment quickly pays for itself after only two years of use on average.
This device is very comfortable and easy to maintain. The filters should just be changed 3 times a year and the network should be cleaned approximately every 5 years.
The price of the Canadian well
The installation of the Canadian well represents a certain investment, but it can be amortized over the years. Likewise, the price of the installation depends on many factors.
A Canadian well costs on average 7000 euros including tax. This rate can reach up to 10,000 euros if it is a Canadian well integrating a double-flow ventilation.
As a reminder, it is recommended to install the Canadian well pipes at a depth between 1.5 meters and 2.5 meters. For what ? Because at this depth, the ground temperature remains stable. As an indication, the temperature is around 10°C in winter and 17°C in summer. These figures may of course vary by region. As a reminder, the ground temperature remains constant all year round at a depth of 2 meters.
At this depth, it is necessary to use pipes. The length of this equipment depends on the depth of the well. As an indication, the average length of a network is estimated at approximately 2 x 35 meters. This allows the air to charge or discharge as heat.
As the Canadian well uses the principle of geothermal energy, it can heat a home in winter and cool it in summer. Its principle remains the same for both seasons. It uses the ground temperature to heat or cool rooms, depending on the season, to ensure comfort in homes, whatever the season.
In addition, the tariff of a Canadian well can also vary according to the characteristics, the performances of the well. Next to the price of the equipment, we must consider the price of the works. These will be fixed according to the complexity of the site. In all cases, the Canadian well is beneficial in both summer and winter.
Reconciling practicality, energy saving and ecology, the Canadian well allows you to take advantage of the right temperature in all seasons. In summer it cools the air and in winter it warms the house. However, the Canadian well requires fairly large installations and is especially suitable for wet soil. It is therefore essential to seek the advice of a professional before installing such a system. If the project is feasible, it provides many benefits. In fact, the Canadian well reduces the amount of the energy bill and heats the house with less energy. It is therefore a very interesting ecological approach. The price of a Canadian well installation depends on many factors.
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