Fans: cheap and noisy
The gadget costs less than the simplest oneair conditioner. On average, from 600 to 3,000 rubles. In addition to the price, the fan has another advantage: before using it, you do not need to invite a technician who will connect the device. When choosing a model, you should follow a simple rule: the larger the area of the room in which the fan will work, the more powerful it should be. For example, a room of 20 square meters requires a unit with a power of 50 W. It will need 0.05 kW per hour. It is easy to calculate that if the device works 6 hours a day, then it will consume 0.3 kW of energy daily. For 30 days, it turns out to be 9 kW. At a cost of 5.38 rubles per kW, the electricity bill will increase by 48.42 rubles.
Photo:Getty ImagesBy type, fans are table, floor and ceiling. The most compact and with a low power of 15 W is a table fan, it makes sense to put it only in a small room. The radius of rotation of the device is 90 degrees. Such a fan can be purchased for a price of 600 rubles. A floor fan with large blades cools the air better than a table fan. As a rule, it has several rotation speeds, as well as a high leg, it can be adjusted to change the direction of the air flow. The price of such a device starts from 1300 rubles. The most effective of the fans is the ceiling fan. Its price is from 4000 rubles. It is distinguished by greater power. Disadvantages of fans: increased noise level; inability to cool the air. The hot flow only moves around the apartment. Because of this, the device has to be constantly kept on. While it is working, the room has a comfortable temperature, but as soon as you press pause, it gets hot.
Air conditioning: expensive and efficient
This device cools the air to the desired temperature.temperature. But you will have to spend money on its installation. Installation will be cheaper if you buy the device from the same company that provides the connection of the system. On average, this is from 5 thousand to 8 thousand rubles. The unit must be selected taking into account the area of the room. If the room is large, a low-power model will be forced to work hard and spend much more time and electricity on cooling the room. But there is another indicator that is important to pay attention to. This will help reduce electricity costs during use of the device. When buying, it is better to choose an inverter air conditioner. Usually, sellers in stores offer this option, say that it is better, but they cannot explain what the advantage is. Let's try to understand the situation. A conventional air conditioner cools the air to a set value, and then turns off. After this, the temperature in the room inevitably begins to rise. As soon as the value increases by 3-5 degrees, the device turns on. And again works at full power. An inverter device works differently. After cooling the air, it does not take a break, but continues to work, but only at low speed, consuming 25-75% less energy than when cooling. This is enough to maintain the desired temperature. By the way, units of this type have another advantage, which is noticeable in winter. They can work for heating at 25-degree frost outside. A conventional device can only function at -5 degrees. It cannot cope with lower temperatures. Disadvantages of inverter models: high cost. For example, a conventional model costs from 7900 rubles, an inverter model - 21,500 rubles; sensitivity to voltage drops; expensive repairs. As for the approximate costs of electricity, it is not as easy to calculate them as in the case of a fan. It depends on the conditions: the higher the temperature of the air that needs to be cooled, the higher the electricity bill will be. But an approximate calculation can still be made. If we assume that the device (not inverter) will work 6 hours a day in moderate heat, and the specified need is 0.8 kW per hour, then it will consume 4.8 kW per day. With a cost of 1 kW / h of 5.38 rubles, the cost of cooling in one day will be about 24.21 rubles. Then it is easy to roughly calculate how much electricity the air conditioner consumes per month - the resulting value is multiplied by the number of days in the month. For example, 30 days at 24.21 rubles will cost 726.30 rubles. Again, it is worth keeping in mind that these figures are very conditional. In extreme heat or cold, the data can change significantly. Important! The cost of operating the air conditioner increases by 10-12% with the windows open. Pay attention to the energy efficiency class. If there is the letter "A" on the label, then the device is economical
