The disadvantages of the idea of ​​installing one air conditioner for two rooms outweigh the advantages

Installing a large air conditioner for two small rooms may save electricity when the two rooms have the same usage needs, but in reality it is not so.

Recently, many people have been whispering to each other about installing one large air conditioner for two small rooms, which will not only save you from having to buy multiple air conditioners, but will also cool effectively and save electricity. However, this method is not always effective.

The formula for calculating the power consumption of an air conditioner is: A = P xt, where A is the amount of electricity consumed, P is the capacity of the machine and t is the time the machine is on.

Specifically, depending on the type of air conditioner, a 9,000 BTU machine running at 16 degrees Celsius for 10 hours will consume about 7.5 to 12.5 kWh. If you use these two machines, it will consume 15-25 kWh.

Meanwhile, the capacity of a 12,000 BTU machine is usually around 9.5-16 kwh, if turned on for 10 hours, you will only spend 9.5 to 16 units of electricity.

You can check the machine's capacity in the product's leaflet or specification table. When comparing products of the same brand and model, we see that a 12,000 BTU machine usually has a capacity 20-25% higher than a 9,000 BTU machine.

Thus, if we install a 12,000 BTU machine for two 16m2 rooms at the same time, we will save more than installing a 9,000 BTU machine each, provided that the two rooms have the same cooling needs.

However, the reality is that we rarely use the air conditioner in both rooms equally.At one point in time, one room may be occupied but the other may not be, one room may need to be colder but the other may not.

In addition, even if the air conditioner is on, the coldness in the same room is not the same in different locations. The location directly on the air flow will be colder. You can see in some offices, employees near the air flow have to wear jackets while those sitting far away still feel hot. In order to prevent any employee from feeling hot, the air conditioner temperature must be lowered, while if many small machines are installed around, we can increase the air conditioner temperature and everyone will still be cool.

Remember, if the room temperature without the air conditioner is 34 degrees Celsius, when you turn on the air conditioner, increasing the temperature to 25 degrees Celsius, you can save 50% of the power consumption, regardless of the capacity of the machine (if the room temperature without the air conditioner is higher, you save less electricity).

Also because of different usage needs, in meeting rooms and restaurants with large spaces, people still install many small machines around instead of installing one large machine.

In fact, some people also install one air conditioner for two rooms, but the main reason is not to save money but because of problems with the house structure, for example, living in an old apartment building, the wall is difficult to drill to install an air conditioner, so they have to choose the solution of installing a large capacity air conditioner. They do not drill the wall between the two rooms to install the air conditioner, but usually install the air conditioner in one room and then open the connecting door, releasing the cold air to the next room. Of course, the room that "borrows" the cold air only makes it a little less hot.

In case you only use a room with air conditioning, close the door and increase the temperature to 28-29 degrees. Thanks to that, you can save electricity equivalent to installing a small capacity air conditioner at a low temperature.

According to Le Thanh Tung/vnexpress