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

The need to install a special hood over the stove is explained by the desire of users to get rid of odors and other fumes that form in the kitchen during cooking. At the same time, it is possible to ensure the required efficiency of indoor air purification only if certain rules and recommendations determined by the relevant regulations and standards are followed. In this article, we will introduce you to the existing types of exhaust structures and consider the procedure for their installation using one of the most common models as an example.

Types of hoods for the kitchen

At present, a wide range of kitchen hoods is presented on the domestic market of household appliances, which, according to their design, are divided into the following types:

• Suspended design, one of the most easy to install and practical exhaust devices suitable for most ordinary users. With all these advantages, such an extract, however, is characterized by insufficient performance;
• an exhaust device built into walls or ceilings that provides the required efficiency in 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 countertop located near it;
• the so-called "island" hood, mounted in the center of the kitchen and providing air exchange throughout its volume (including above the 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 variant of the duct is the need for constant care during operation. The metal box used as an air duct is more convenient to use, but will require significant costs 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 procedure for installing a kitchen hood will be considered by us using the example of a simple hinged system, the installation of which requires 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 polluted air;
• the height of the hood above the surface of the stove should not be less than 50-60 cm (the optimal distance from the heating elements is about 75-80 cm), which provides 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 serviced premises and ensure the renewal of air 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 served room, respectively, and 10 is the minimum air exchange rate (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 performance, operating on the principle of air mass recirculation.

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

The procedure for mounting the hood housing

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

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

Important! When preparing a site for installing a wall-mounted hood, the main thing is to ensure that it is located strictly symmetrically above the gas stove, 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, a 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, holes are carefully drilled in the wall into which dowels are driven;
• then, in the dowels, with the help of 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 (watch the 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 air ducts and connection of power supply

• outlet channels for a wall-mounted kitchen hood are recruited from relatively short and straight segments with a minimum number of bends, the radius of which should be chosen as large as possible;
• when using corrugated hoses as a discharge channel, their bending angle 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 connected 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, which must be connected to a specially equipped socket with a grounding contact.

Important! To avoid heating, such a socket should not be located above the area where the hood is located.

Conclusion

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