Cooker hoods come in all shapes and sizes. To find one that best suits your needs: compare the benefits between ducted and recirculated extractor hoods, weigh up your design and installation options, match the size to your hob and kitchen, consider noise levels, and see what innovative features are available. This helpful cooker hood guide answers the most common questions on cooker hoods:

Siemens recirculation hoods

What is recirculated ventilation?

With recirculated ventilation (also known as ductless or non-vented extraction) air is drawn in and cleaned by grease filters and an activated carbon filter. The cleaned air is then conveyed back into the kitchen.

Siemens extraction hoods

What are cooker extraction hoods?

With ducted ventilation, the air is drawn in and cleaned by grease filters. It is then piped straight to an extraction point on the outside of your home.

What type of cooker hood should I buy?

Whilst all extractor hoods are effective, the specific type you need will depend on the layout of your kitchen, installation requirements and your design preference. Island hobs can be fitted with the following types of kitchen island hood: a ceiling hood, island chimney hood, downdraft hood or vented hob. While built-under hoods, canopy hoods, integrated design hoods, telescopic hoods, wall chimney hoods and vented hobs are suitable for standard kitchens.

Which island cooker hoods are best for me?

To find out which cooker hood is right for your island hob, consider these key differences. Downdraft hoods and vented hobs are the perfect solution for keeping your kitchen design and sightlines clear. Discreet and most quiet they extract the cooking smells directly at the source but take up some space beneath the worktop. The ceiling cooker hoods, ideal if your hob is the centre of your room, can either be bold design statements installed over an island unit or blend as unobtrusively into the ceiling as standard kitchen lighting. Finally, island chimney hoods are big and bold. These eye-catching hoods are typically used in large open-plan kitchens.

What is a downdraft range hood?

A downdraft cooker hood is a retractable ventilation system that is integrated into the kitchen worktop. It sits beneath the hob, drawing steam, fumes and grease downward.

What size cooker hood do I need?

To keep your kitchen free of smoke and odours, your cooker hood must be at least the same width as your hob. However, 1.5 times wider is the ideal size. You should also make sure the extraction rate of the hood is sufficient for the size of your kitchen. Sizes include 52cm, 53cm, 60cm, 70cm, 73cm, 75cm, 80cm and 90cm.

Siemens standard width cooker hoods

Standard size

The standard width of a cooker hood is 60cm

Siemens 70cm  width cooker hoods

70cm size

Siemens 80cm  width cooker hoods

80cm size

Siemens 90cm  width cooker hoods

90cm size

Power levels: how many cfm do I need for my range hood?

The power of a cooker hood, how much air it can extract, is measured in cubic feet per minute (CFM). The minimum hood CFM required for a standard width electrical hob (60cm) is 600CFM. However, the same size gas hob will give off more heat and therefore need more power. Of course, larger hob sizes and bigger kitchens will need an even higher CFM rating. The CFM requirement is also affected by duct size, starting at 400 CFM for the smallest and exceeding 1200 CFM for the largest ducts.

Cooker hood noise levels

Since cooker hoods are designed to create a comfortable cooking environment, noise level is an important consideration. The average cooker hood has a noise level of between 60 – 70 decibels. Anything above this is likely to be distracting.

Siemens quietest range hood

What is the quietest range hood?

Any range hood with a sound output of between 40 – 60 decibels is considered to be very quiet.

What innovative features does Siemens offer?

What type of filters are there?

There are three main types of extractor hood filters; fleece filters, metal grease filters and odor filters (also called activated carbon filters). Fleece filters are simple grease filters used in a few, mostly older, Siemens cooker hood models, while metal grease filters are used in both circulating air and exhaust air systems. Odor filters / activated charcoal filters are only used in recirculation mode to remove bad odors from the cooking vapors.

Clean Air Plus odour filter

The Siemens Clean Air Plus recirculating air filter can neutralize over 90% of odours, which far exceeds conventional air circulation systems. Dust and 99% of airborne pollen are also filtered, and allergens retained in the filter are deactivated. The Clean Air Plus activated carbon filter usually has to be changed every 12-18 months.

Long Life odour filter

The Long Life odour filters convince with over 80% odour reduction and up to 10 years of full performance thanks to the possibility of regeneration. A saturated Siemens Long Life filter can be restored to almost 100% of its capacity after a regeneration process of 2 hours at 200 ° C hot air in the oven.

Standard odour filter

The standard activated carbon filter reliably removes up to 85% of unpleasant smells, including those difficult fish smells, with a service life of 6-12 months.

How high should a cooker hood be?

The amount of clearance required depends on which type of hob you choose. For standard electric, ceramic and induction hobs, your cooker hood should be between 55 – 70cm high while gas hobs need a clearance of at least 65cm – and more for larger appliances.

Siemens electric hobs

Electric hobs

If you have an electric hob, you will need clearance of between 45 and 65cm between the cooktop and hood. This depends on the type of hood you choose.

Siemens gas hobs

Gas hobs

For gas hobs, you’ll need clearance of at least 65cm. For ceiling hoods, the ideal distance between the cooktop and hood is 120cm.

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