If you are planning to install a chimney for your kitchen, you need to plan and settle several most important matters like the height of chimney in Kitchen. The effective distance between chimney and stove, suction capacity, and dimension (60cm, 90cm) are such factors you need to consider.
Kitchen Chimney height calculation is easier than you have ever thought. We recommend the installation of the chimney by a specialized technician to avoid unwanted and unsafe practices. This guide can help you calculate and plan proper Kitchen Chimney Installation Height and Suction Capacity Selection in the right way.
Kitchen Chimney Height Calculation and Installation
The height between the chimney hood and stove is very important in terms of the efficiency of the chimney. If you install the hood too close to the stove it may catch fire and highly unsafe. So, you need to maintain a safe height from the cooktop.
But if you install it too high from the stove, it will suck the dirty air along with the surrounding fresh air. Hence, the kitchen chimney height should be balanced and you must maintain an optimum distance between gas stove and chimney.
So, what should be the height of chimney from gas stove?
The Kitchen Chimney height calculation comes handy in this situation to find the chimney distance from gas stove. You need to place the hood at an optimum distance from the stove that is safe and can vent out the dirty air efficiently.
As guided by most of the chimney professionals, you must install the chimney at an ideal height of 24 inches to 30 inches from the stove. Once you have bought a chimney, look for the recommended kitchen chimney height from stove mentioned in the user manual.
For example, Elica has mentioned keeping the chimney fitting height between 70 to 75 cm (27.5 to 29.5 inches) as the distance between chimney and stove. Click Here to Download the Extensive operating manual of Elica Kitchen hood.
Also Read: Best Kitchen Chimneys in India (2020)
Essential Accessories for Chimney
4 Factors to calculate exact installation height of a Chimney
There are several factors that you need to consider while determining the exact installation height of the chimney.
1. Type of Oven/ Cooktop
If you are using a gas stove with a naked flame during cooking, the placement of the chimney should be above 24 inches. If you install the chimney closer than 24 inches, it may suck the flame inside and may catch fire. However, you are safe, if you use an induction cooktop for cooking. As there is no naked flame, the risk of fire hazard is minimized.
2. Number of bends and length of the duct
Installation of a chimney can be complicated with the installation of long ducts to the chimney. If it is required to install a duct with long length with multiple numbers of bends, the flow of the smokey air gets obstructed. As a result, the discharge rate of air outside the duct is reduced affecting the efficiency of suction. For this reason, users tend to lower the installation height of kitchen chimney. But it is not recommended at all due to safety reasons. Instead, you should select a chimney with higher suction power.
In such cases, a higher capacity of chimney like Faber 60 cm 1200 m3/hr Heat Auto Clean Chimney is recommended to install at an optimum height.
3. Effect of Suction Capacity
It is one of the major factors that you must consider while selecting a chimney for your kitchen. A chimney with lower suction capacity (below 800 m3/hr) should never be installed above 30 inches from the stove. This is because low suction capacity cannot suck out the fumes from a longer height above the stove. This relation between suction capacity and height of chimney depends on different factors that vary from brand to brand.
4. Kitchen design and position of Stove
The design of the kitchen and position of the stove above which the chimney is to be installed, have a huge impact to determine the installation height of the chimney. The position of the stove should be near the outer wall of your kitchen so that the air can travel efficiently with minimum obstruction. It reduces the cost of installation and improves the performance of the chimney.
But, if the position of the stove is near the sidewalls of the kitchen, the installation may involve the long length of duct, reduced suction power, inefficient operation. This is why you should shift the position of the stove near the outer wall. However, it is not always possible. In that case, select a chimney with higher suction capacity.
How to Select Chimney Suction Power with respect to Height?
You need to install the chimney in such a way that it can effectively suck out the gases and fumes as well as maintain proper safety during cooking. Before placing at a height, firstly, you have to select the right suction capacity.
The typical dimension of a standard kitchen is 13 ft x 13 ft x 8 ft with lots of open space. For a 240-300 sq. ft. kitchen with 8 ft height you have a bigger volume of air.
In other words, the volume of air in the kitchen= 12ft x 8 ft x 10 ft= 960 cubic foot or 27.18 cubic meters.
So, you need to suck out the 27.18 cubic meters of air from the kitchen a number of times when you are cooking. It is recommended to remove the dirty air 10 times an hour for standard cooking. However if more fume is generated during cooking some special dishes, you may need to vent out the air more than 10 times an hour.
So the formula for selecting the suction capacity of a chimney is as follows.
Suction Capacity= Volume of Kitchen x Number of times to remove air x factor of safety
where the factor of safety denotes an integer that is more than equal to 1. You may require to increase the factor for better results.
For the best result, with the factor of safety= 4, you need the suction capacity to be 1087 cubic meters/ hr. But according to the cooking recipe, you may need higher or lower suction power sometimes with the factor of safety from 1 to 10.
You need to keep in mind that the rated capacity written in the product description is the maximum suction capacity. No electronic devices can work with 100% efficiency. So, it is better to select a higher suction capacity than the calculated figure. For a room dimension mentioned above, you may need an 1100 cubic meters/ hr chimney to cook very efficiently without any problem. This Hindware 60cm 1200 m3/hr Auto Clean Chimney on amazon may fulfill your need.
Length of Duct and number of Bends
A duct is an integral part of a ducted chimney. The blower motor inside chimney sucks the dirty air to remove it outside through this duct. The length of the duct depends upon the placement of the stove and exhaust location on the wall. More complicated is the duct path, more the bends you may require. More bends may affect the suction force by the chimney as there are more restrictions on the flow of air. Depending on the chimney installation height, the length of the duct can be set accordingly.
So, it is recommended to select shorter duct length with fewer bends for efficient working for the chimney.
Provision for Operation & Maintenance
Whenever you buy any appliances that should stay fixed at a particular location like a chimney, a provision for maintenance must be given. You need to clean the chimney routinely. For that reason, the chimney should be placed at a convenient height so that you can handle it easily. Ease of maintenance is very important to keep the appliance in optimum condition.
To operate the chimney, the hood of the chimney should be around the eye-level. The objective here is to avoid strain on the eye as well as operational safety.
Before you install the chimney, you must ensure that the voltage requirements of the chimney match your supply electricity. Generally, it should not create any problems as all household electricity supplies are of 220 V, 60 Hz. But you should check the user manual once. The plug point for the chimney should be very close to it. With this, the cable would not be under tension and you can easily use it. It is very important from the safety point of view as well as user-friendliness.
7 Tips for Fitting & Use of a Chimney
- Install the chimney at the proper height after calculation.
- Before starting cooking, remove the plastic covers and films on the body of the chimney and baffle filters.
- While frying do not leave the pan unattended as the oil may flare up and cause a fire.
- Clean the oil residue routinely on the body and the surface of the chimney to avoid catching fire.
- Wash the filters at least once in 2 weeks to ensure optimum performance.
- Always switch off and disconnect the plug before doing any maintenance of the chimney.
- Read user manuals for any troubleshooting or maintenance but for any repair work, leave it to the professionals.
- For easy cleaning, dip the filters in a warm solution of detergent for 10-15 minutes and then wash in running water. Next, dry up the filters and reinstall them in the chimney.
- Chimneys are a far better system to remove gases and fumes from the kitchen when compared to the exhaust fan.
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