Helper
Not 100 % sure with your choice? Or do you need help with installing your fan? Ventilation can be a really hard subject to understand as not everyone is as much a fan of ventilation as we are. That is exactly why we are here to lend you our helping hand and help you.
You will find here some useful information or a calculator that will help you choose the right fan for your room. The calculator works with the size of the room and its type. Thanks to these parameters it can help you determine the appropriate flow of fresh air in the room on the basis of a suitable coefficient. The table includes residential and commercial premises so everyone should find the room they are looking for.
If you can not find the necessary information here, you can always use one of the methods of direct communication with us. We are here for you every weekday from 7:00 to 15:30 CET in the telephone +420 483 368 706 or at the email address help@klimatom.cz. You can also use our contact form. If you plan to communicate with us more, you can always scan the QR code on the right and add us to your contacts (only available for computer screens).
Our products are covered by five-year warranty only if the customer manually extends the warranty using the form below. You will find all the necessary information on the label of the purchased product and/or on the tax document issued by the seller.
In case you need advice on choosing a fan according to performance, you are at the right address – at least the Internet one. Use our calculator for the recommended fresh air passage for your room or calculate it yourself according to the table below the calculator, where a example is given.
However, it is necessary to know the dimensions of the room (length, height and width) and the type of room in which the fan will be installed. You can choose from many residential and commercial rooms. The calculation is performed according to the set of coefficients for each room. The calculator always calculates with the highest coefficient, which guarantees trouble-free air exchange in the room.
The calculator automatically calculates the volume and recommended airflow of the room. You can find out the recommended range from the table by your own calculation. It is recommended to always choose a higher value. Then look for the resulting value on the product page in the “Parameters” tab.
| Room Type | Air Exchange Coefficient |
| Bathroom | 6 to 8 |
| WC | 2 to 3 |
| Bathroom with WC | 4 to 10 |
| Public WC | 10 to 15 |
| Office WC | 3 to 5 |
| Living room | 2 to 3 |
| Kitchen | 6 to 10 |
| Office | 3 to 7 |
| Laundry room | 10 to 15 |
| Cellar | 4 to 6 |
| Garage, workshop | 4 to 8 |
| Bank | 2 to 4 |
| Commercial/Shopping area | 4 to 8 |
| Cinema, theatre | 7 to 9 |
| Restaurant | 8 to 12 |
| Bar, café | 9 to 11 |
| Restaurant kitchen | 15 to 20 |
| Laboratory | 8 to 12 |
As it was mentioned earlier, it is necessary to know the length, width and height of the room. Based on these three dimensions you will be able to calculate the volume of the room. You will only need to simply multiply these dimensions to get the volume of your room.
My room is 4 meters long, 3 meters wide and 2.7 meters high. The volume of the room is 32.40 m³.
After geeting the volume, it is necessary to determine type of the room and select a suitable coefficient. The calculator above will make it much easier for you, as it always counts with the largest coefficient that guarantees trouble-free air exchange. You will then multiply the calculated room volume by the selected coefficient and you will get the recommended volume of air flow.
I want to install a fan in the bathroom and I calculated that its volume is 32.40 m2. I get a coefficient of 6 to 8 for the bathroom from the table above. I can choose one coefficient or use a range of these coefficients. After multiplying the volume by the coefficient I get recommended air flow that is in the range from 194.40 to 259.20 m³/hour.
So when choosing a fan, I will look at the fan power that it is at least in the range of these values. I can always get more than one fan and add up its power together. Information on the fan volume flow can be found on the product page in the “Parameters” tab.
