There are two types of cooker hoods; they differ in the way the air is expelled after cooking. Suction hoods expel the air out through a ventilation shaft, while recirculation hoods filter the air and return it to the kitchen. The installation of a suction hood requires an outlet duct, and the absence of a wide range of models compared to that of recirculation hoods can also be considered a disadvantage, but the devices require less maintenance.

• In the event of a gas cooker, the productivity of a hood must be at least 400 m³/h, while even 200 m³/h is sufficient for an electric cooker.
• It is also important to pay attention to the energy label of the hood.
• The hood must be at least as wide as the hob. This will improve its extraction performance when the air rises.
• It is best to install a cooker hood that is slightly larger than the hob – approximately 1.5 times wider.
• Hoods equipped with LED lighting will have lower energy consumption.
• In 2016, new fire safety requirements came into force that prohibit the addition of cooker hoods to natural ventilation ducts. Extractor hoods, which collect vapours and oily particles from food in the kitchen and then carry them out of the home, are intended for use where there is a duct specifically designed for this purpose. Thus, the rules say that if you want to install a cooker hood, you must have two ventilation ducts in your home.
• The noise levels of cooker hoods range from 40 to 70 decibels on average. When you buy a new appliance, the noise level is indicated on the energy label, but it may vary depending on the mode you have installed. The higher the installed operating speed, the louder the cooker hood will run. For quieter operation, a silencer is available on some cooker hood models.
• Built-in hoods are available to match other elements in the kitchen, but wall-mounted options are available in a wider range of options.