The summers are always longer in Pakistan and this month of Ramadan in 2016 appears to be the hottest one in my life. Perhaps, in past few years, we have started to feel the results of global warming.
Despite the effect of electronic devices on the environment, we are always looking for similar solutions for cooling down ourselves. The best way to counter the heat is to have an AC installed at our home or office. And of course, it all depends on upon the size of our pocket. But today, there are other things to worry about as well before taking a decision.
So what options do we have? A split AC? Or, the old power hungry Window AC? — which should only be available in a ‘used’ state today since the technology is obsolete. Of course, the choice would be a split AC, but which one? A DC Inverter AC or an ordinary one?
What bothers you?
Although the prices of air-conditioners are not very high; and even there are always installment plans from the various sellers, however, the electricity is very expensive in the country.
People who cannot afford their electricity bills rely on the air of a ceiling fan. Not to forget that government has already announced a rise in per unit cost for consumers which NEPRA has already approved.
What’s the solution?
If the cost of running an air conditioner is rising, so is the level of innovation which counters the impact. Today, there are some DC Inverter AC units available on the market that promise to save 30 percent of your electricity bill because of their advanced technologies.
The technology is introducing new ways of saving the power. In old days, window ACs were used, but they were hefty and consumed too much electricity. In the present era, almost every house has a split air conditioner, which somehow consumes less power than the older big brothers. Even the split ACs have been modified by introducing the DC inverter technology for further controlling the running cost.
Primary Difference between DC Inverter AC and standard AC
Technically speaking, in an inverter technology, the alternating current in our power supply is first converted into a Direct Current (DC) and then it reconverted into an alternating current (AC) where the frequency is infinitely variable. This variable rate enables the primary compressor motor of the AC to turn at different speeds.
Plainly speaking, a regular air conditioner cools down the room and cuts off the compressor. When the room gets warmer, it restarts the compressor for cooling down the room, and this cycle goes on, and compressor keeps turning off and on. In this way, the temperature of the room keeps fluctuating from cooler to warmer. Recall those days when you felt cold during the night, and you looked for a quilt around you because your AC had started cooling too much. The reason was irregular fluctuation.
Let’s be more specific, for example, if you set the thermostat of a regular AC to 22 degrees, the AC compressor keeps running until it reaches 22 degrees and then the compressor switches off. Once the temperature starts rising, let’s say it reaches 24 degrees, the compressor turns on again, cools the room and stops at 20 degrees, this time, giving you shivery night. The cycle goes on throughout the period your AC is running. It’s a kind of an inefficient working.
How does a DC Inverter AC work?
The DC Inverter AC controls the temperature of the room by running the compressor at different speeds as per requirement. When the DC inverter AC starts, the compressor operates at a high speed for cooling down the room temperature till it reaches the temperature you set.
Unlike regular AC, the compressor does not stop here, rather, slows down, maintaining a constant temperature which certainly saves a lot of energy. If someone opens a door or the window, the AC senses the fluctuation in temperature and instantly adjusts itself accordingly by maintaining the compressor speed and the room temperature.
How can you save huge electricity cost?
If cooling is a major problem so is the electricity bill. With regular AC, the compressor keeps switching on and off. The startup current in any motor is always very high. The compressor in a standard AC starts and stops several times, thus, consuming lots of power at every time it starts. How can you forget those massive electricity bills in summers?
On the other hand, the DC Inverter AC starts its compressor once and then as mentioned above, maintains its motor speed according to the room temperature. When the engine is running very slow, it naturally lessens the electricity consumption.
We can sum up a few main advantages of DC Inverter AC:
- Nearly 40% cheaper to run regarding power consumption
- No voltage peak
- Reach the set temperature quickly
- Quieter than normal AC
There are so many things to compare in both the technologies, but it would be too technical and too boring. There are so many companies advertising in Pakistan, which is a bit confusing as to which AC one has to buy this season. A DC Inverter AC?, or a regular AC? After all, it’s an investment for a couple of years.
Which brand to look for?
Although some companies are advertising on mass media, we have tried to highlight the specifications of 3 leading advertisers including the Haier.
This random comparison comes from a market survey based on the opinion and findings of various engineers and technicians. It looks odd to use Rival 1 and Rival 2 as the brand name, but we found it safer to use them instead of actual names. However, we are using the name of Haier because, somehow, we are more convinced to the specs.