Hood above a gas stove: types, requirements and installation procedure

The need to install a special hood above the stove is explained by the desire of users to get rid of odors and other fumes formed in the kitchen during cooking. At the same time, it is possible to ensure the required efficiency of air purification in a room only if certain rules and recommendations are determined by the relevant norms and standards. In this article we will familiarize you with the existing types of exhaust structures and consider the procedure for their installation on the example of one of the most common models.

Types of hoods for the kitchen

Currently, the domestic market of household appliances has a wide range of cooker hoods, which are divided into the following types according to their design:

• Suspension design, one of the most convenient to install and practical exhaust devices suitable for most ordinary users. With all these advantages, such a hood, however, is characterized by insufficient productivity;
• an exhaust device built into the walls or ceiling that provides the required efficiency for removing odors and fumes from rooms of a large area;
• an exhaust device designed in the form of a dome, the effect of which extends not only to the stove, but also to the working surfaces of the countertops located nearby;
• the so-called “island” hood, mounted in the center of the kitchen room and providing air exchange over its entire volume (including over a gas stove).

Auxiliary elements (air ducts)

As air channels through which unpleasant odors and fumes are discharged to the hatch of the ventilation shaft, special air ducts are used, made in the form of:

• corrugated pipe;
• hard metal box;
• PVC pipes with smooth walls.

The advantages of corrugated pipes include their flexibility and relatively low cost. The disadvantage of this budget version of the duct is the need for constant care during operation. The metal box used as an air duct is more convenient in operation, but it will require significant expenses from the contractor. The most optimal option is the use of a PVC pipe, which is not only easy to install, but also does not require special care. Unlike other air ducts, such a pipe is installed strictly above the hood.

Hood installation requirements

The installation procedure for the kitchen hood will be considered by us as an example of a simple hinged system, the installation of which involves the following requirements:

• the dimensions of the intake opening must correspond to the size of the gas stove, which ensures the most efficient removal of contaminated air;
• the height of the hood above the surface of the stove should not be less than 50-60 cm (the distance from the heating elements of about 75-80 cm is considered optimal), which ensures comfortable working conditions. If it is placed too low, the space for working with the stove will be limited, and the case of the device itself may overheat;
• the performance of the exhaust device must correspond to the volume of the premises served and provide air renewal in it at least 10 times a day.To calculate the exact value of this indicator, it is necessary to determine the main dimensions of the kitchen room, and then use the following formula: V = SxHx10x1.3, where S and H are the area and height of the premises served, respectively, and 10 is the minimum indicator of air exchange intensity (1.3 - correction factor);
• in the event that your house does not have a separate ventilation shaft with access to the kitchen - it is recommended to use a flow-type exhaust device with variable capacity, working on the principle of air mass recirculation.

Note! Connecting such hoods to an existing ventilation shaft can disrupt the operation of the entire exhaust system as a whole. In addition, flow-through devices are not recommended to be turned on at full power (in maximum performance mode) for a long time.

Mounting procedure for the hood

The installation of the hood over the gas stove involves the phased implementation of a whole range of work operations of the following nature:

• hang the hood of the exhaust device directly above the stove;
• installation of exhaust ducts, ensuring their reliable connection with the hood and the hatch of the ventilation shaft;
• the supply of electrical power necessary for the operation of the exhaust device.

Important! When preparing a place for installation of a hood-type hood, the main thing is to ensure that it is located above the gas stove strictly symmetrically, since even the slightest deviation of the body to the side reduces the efficiency of the device by 10 - 20%.

Direct installation of the hood at the place of its operation is carried out in the following sequence:

• first, careful marking of the attachment points is made taking into account the location of the supporting elements on the rear wall of the case (for these purposes it is most convenient to use a pre-prepared template);
• after that, in accordance with the markings in the wall, holes are carefully drilled into which the dowels are driven in;
• then, in the dowels, with bolts, the supports used for hanging the body are fixed;
• at the final stage of installation, it remains to hang the hood itself on the prepared supports (see video).

Note! During trial hanging, it is necessary to check the correctness of its orientation in various planes, which is verified using the building level and can be adjusted by changing the position of the supports (their design allows adjustment within small limits and allows you to hang the hood quite comfortably).

Installation of ducts and power supply

When installing the duct, we advise you to pay attention to the following important details:

• outlet ducts for a hinged-type kitchen hood are drawn from relatively short and straight sections with a minimum number of bends, the radius of which should be chosen as large as possible;
• when using corrugated sleeves as the outlet channel, the angle of their bending should not be less than 90 degrees;
• it is also not recommended to narrow the outlet section of the duct, which can lead to an increase in the noise of its operation;
• the hatch of the ventilation shaft, to which the air duct is supplied, must be completely cleaned of all contaminants accumulated during its operation.

For the operation of the exhaust mechanism, an electrical network is required, the supply of which must be provided in advance. As a rule, products of this class are equipped with a cord with a plug, for the connection of which a specially equipped outlet with a grounding contact should be used.

Important! In order to avoid heating, such a socket should not be higher than the exhaust zone.

Conclusion

From our description it follows that hanging the hood over a gas stove is not at all difficult, as you can see by watching any video on the subject posted on the network. From these videos you will learn about how to install a cooker hood over a stove, as well as about the existing ways to connect it to existing communications.