Difficult to make a choice for your new Vmc Double Flux? We wrote this Vmc Double Flux special buying guide to help you, with the TOP10 of the best sales of the moment, tests, opinions… As in all our buying guides, we have done our best to help you choose the best Vmc Double Flux!
Our selection of dual flow vmc
Vmc Double Flux Buying Guide
If you want to benefit from efficient air renewal while saving energy, the installation of a double flow CMV in your attic is the ideal ventilation solution. This powerful device also allows you to heat your home. You can find many references from many brands of this product on the market. To make the right choice, refer to your own needs but also to its various purchasing criteria. The operating mode, efficiency, air flow, or energy consumption are all technical characteristics to be taken for the purchase of the best double flow CMV for you. Consult this file to learn more on the subject.
The principle of a double flow CMV
A dual-flow CMV is a system that recovers heat from the extracted air in order to transfer it to the supply air, all through an exchanger. The extracted air and the blown air do not mix, it is the heat that is exchanged. The dual-flow VMC extracts air from utility rooms that have a water point, such as showers, toilets, kitchen, pantry, etc. Then, the air is blown into the main rooms of the house such as bedrooms, living room, dining room, etc.
You should know that the box must be placed in an isolated volume. Also, the ducts which pass in uninsulated volume must be insulated in order to avoid the formation of condensation which presents risks to your health. Finally, the module must remain accessible to facilitate regular maintenance of the system.
The components of a double flow CMV
A dual-flow ventilation system is made up of different elements requiring regular maintenance. Find out:
- The blower fan
- The exhaust fan
- The heat recuperator, which is not mandatory
- The bypass which is optional
- Blowing and extraction terminals
- The two supply and extraction networks
The advantages of a double flow CMV
Installing a dual flow CMV is advantageous in many ways. It is important to know these strengths in order to encourage you even more in your quest for the ideal model for your needs. What are they ?
- You save energy since you will consume less heating. In fact, the air that is blown by the dual flow CMV is hot, and the use of a heater is therefore not necessary when it is moderately cold.
- You gain in comfort in your home because the air circulating there is pleasant. Instead of negative temperature, you will live with air that has a temperature of 10 ° C. In addition, external noise is drastically reduced because the entry of air above your windows is suppressed.
- The air you breathe in your home is of better quality thanks to the double flow CMV. This is because the system filters harmful elements such as pollen, bacteria, spores, molds and other fine particles.
- The double flow CMV is compatible with Canadian wells. These offer excellent profitability in terms of energy and allow cooling in summer.
The different types of double flow CMV
The classic double flow CMV
The classic dual-flow CMV works by exchanging heat between the extract air and the supply air. This process limits heat loss compared to single flow CMV. You should know that the classic double flow CMV is the most popular system of the different types of double flow CMV.
Thermodynamic double flow CMV
The thermodynamic double flow CMV is the most efficient and economical of the double flow ventilation systems. However, its installation is expensive and requires the housing to benefit from good passive insulation, meeting the latest RT 2010 standards. The thermodynamic double flow CMV is nevertheless a complete solution insofar as it is reversible. It allows you to ventilate, heat the air, and air conditioning; it is even possible that it produces hot water.
Its principle combines both the operation of the conventional double-flow CMV and the heat pump. Thus, instead of drawing heat from the outside air, the heat pump will capture the calories found in the extracted air. It will then take care of transmitting it to the fresh blown air. This process achieves a constant heat pump temperature and excellent performance. You should know that you can benefit from recycling part of the air in order to obtain more air flow. The system is obviously reversible; in summer, your accommodation can also benefit from air conditioning.
On the profitability side, with this type of system, the initial investment as well as the additional costs in terms of maintenance do not make it possible to obtain any profit. However, you will be able to enjoy many other advantages such as significant energy savings, a complete ventilation and air conditioning solution, less external noise and little entry of cold air, better access to filters, etc.
Humidity-controlled double flow CMV
The humidity-controlled double-flow CMV is a ventilation system that allows the air flow to vary depending on the hygrometry, that is to say the humidity.
The criteria for choosing a double flow CMV
The dual flow CMV can work in two different ways:
- Either by being self-adjusting, that is to say that the system operates continuously and incorporates an automatic regulation means;
- Either by being humidity sensitive, that is to say that the system starts up according to the humidity level of the room. This mode of operation is much more economical.
The yield corresponds to heating savings of the device. The efficiency of a double flow CMV is an essential selection criterion. It represents the amount of heat that the system recovers in the exchanger, that is to say the heat input that will heat your interior at a low cost.
The most efficient double flow CMV models can achieve an efficiency of 92 % and more; entry-level ones come in at 65 %. For good profitability, opt for the purchase of a double flow CMV with an efficiency ofat least 85 %.
The higher this efficiency, the more you will save on heating during cold weather. If your system is also equipped with the? By-pass? Option, you will make significant savings on air conditioning costs during hot weather.
Airflow is relative to the volume of your home. It is calculated according to the formula:
cumulative volume of each room / 24 = minimum air flow of the double flow CMV
When making your purchase, the goal is by no means to opt for the high-flow dual-flow CMV, but rather to favor one that offers an air flow adapted to the needs of your home and its occupants. According to the regulations in force, minimum thresholds are imposed in accordance with the decrees of March 24, 1982 and October 28, 1983. By way of example, for a house with 5 main rooms, the minimum total flow of the double flow CMV which must be installed corresponds to 105 m3 per hour.
The energy consumption of a dual-flow CMV can influence your energy savings. Today, manufacturers offer low-consumption engines that can help your dual-flow CMV to reduce its energy requirements considerably.
Before installing this type of device, you should also consider the noise it can generate. This is an essential selection criterion, especially if you have motorized devices in your attic. Remember to check the sound level of the device by referring to the number of decibels but also by performing a double flow CMV test.
The condensate removal outlet
Since a double flow CMV creates condensation and there is water in the ducts, the presence of a condensate removal outlet is useful. It is sufficient that the system integrates a means of connection with the wastewater drainage.
Certifications and standards
To ensure that you choose the best dual flow CMV, a particular indication should be checked on the device. This is the NF VMC or NF 205 certification. As soon as the product contains this standard, this guarantees you an output greater than 85 %, but also low energy consumption.
Programmable interface and remote control
The majority of dual-flow CMV models incorporate a programmable interface which is located on the cover of the device. It is a digital display that allows you to make all the settings and see all the necessary indications. The most sophisticated models even come with a remote control to avoid having to move around to choose the fan speed, increase or decrease the flow in a given room, etc. It should be noted that the most recent dual-flow CMVs fit perfectly into living rooms by being discreet behind a designer facade.
The bypass system
The presence of the By-pass system on your double flow CMV is of great importance. It consists of letting in fresh air at night, then stopping this entry of fresh air during the day. Thus, in summer, you will avoid the blowing of hot air into your home, which is comfortable but also economical in terms of air conditioning.
The choice of extraction and insufflation ducts
If your home is a single-family home, it is advisable to choose flexible ducts for the extraction and insufflation ducts of your double flow CMV. For collective housing, rigid ducts are the most suitable because they are more resistant, but less manageable. In either case, you must insulate your ducts to prevent condensation from the heat exchanger.
The ideal diameter for the ducts is 125 mm for the kitchen and 80 mm for the bathroom. As for the number of outlets and the length of the ducts, they will depend on the air handling needs of the home. When buying, first promote the quality of your sheaths.
Maintenance and installation conditions and advice
These days, energy savings are a major issue. In addition, the price of energy continues to rise. Having a ventilation solution that is both efficient and economical is therefore a wise choice. It should also be taken into account that no less than 20 % of energy losses within a home are caused by the renewal of the air. Double flow CMV is an effective alternative. However, its performance depends on its characteristics, but above all on its installation. The latter is not complicated but nevertheless requires to respect the following steps:
Laying the ducts
The length of each sheath must be proportionately well distributed. Depending on the type of housing, you will have the choice between rigid, semi-rigid, or flexible models. Angles and elbows should be avoided on your ducts as they may promote the formation of condensation.
The waterproofing of the house
For a dual-flow CMV to be effective in your home, it must be airtight. So remember to have the tightness checked at all levels to remedy it in the event of a failure before installing your dual flow CMV. To do this, adopt rolls of sealing tape or take a serious look at the system if the rolls of sealing tape are not enough to reduce air penetration into your home.
Filters and maintenance
Filters that purify the air should be changed every 6 months. Instructions on how to replace them should be read in the user guide or requested from the manufacturer. The quality of the air you breathe in your home will depend on the maintenance of your filters. Also, it is important to consider their cost during your purchase of dual flow CMVs.
Dernière mise à jour : 2021-04-12 02:45:06