Important : Home owners shall get Kitchen hoods or chimneys installed from company authorized technician only.
There are two types of kitchen hood- Duct-able & Recirculation- able.
In ductable kitchen hood type, a duct pipe is fixed to the chimney that take away the heat, odor, smoke and other particles out of house. Whereas in Recirculation-able/ recyclable kitchen hood, impurities, smoke, odor, etc. gets filtered and fresh air is circulated through openings.
Out of two, ductable chimneys are observed to be more effective. Recyclable chimney are usually installed in home where there’s no space for ducts to be installed.
But before using the kitchen hood there are few things that one needs to be careful of like distance between the cooking range and the chimney. The distance is universally set i.e. the distance between the gas stove and bottom of chimney shall minimum be 26” and maximum 30” .
No matter what type of cooking range you have like electric cooking range, built in hob or a usual cooktop, the distance to be maintained is same. The distance shall not be less than 26” nor more than 30”.
If the distance happens to be less than 26”, there are chance that chimney/kitchen hood to catch fire. Like suppose if the distance maintained is less and the gas is left turned on with no utensil on it. Here as per chimneys function when it will be turned on, the fan may suck the flame and catch fire.
Similarly, is the distance between the gas-stove and bottom of chimney is kept more, the performance of chimney will reduce. This is because chimney will not be able to take away all the smoke, heat, odor and impurities completely out of the room. Some of it will spread in air because the distance is more than required. Therefore to avoid any major consequences and degrade performance level of chimney, the distance shall be maintained anywhere between 26” to 30”.
UPDATED info by Experienced Designers at Contractorbhai
Well here the distance to be maintained between kitchen hood and chimney is 36″, But in most Modern house you will find a window or say a wall which has some hindrance because of which you have to install the chimney further away. This certainly drops the performance level of chimney, but there’s no other way.
Another important element that plays important role too is the duct size and number of turns in ducts. For those who have ducted chimneys and the duct size is really long, make sure the suction power of these chimneys is higher. The suction here needs to be high for the smoke and other impurities to travel out completely from the duct leaving the kitchen air clean.
This is one of the factor that is very essential to have odor free hygienic cooking experience. The chimney’s suction power, the length of the duct, and number of turns in duct all these factors go together. And therefore I would say that its best to consult an kitchen expert of The Chimney company representative to have appropriate provision made to install chimney and hob.