16.04.2015

Inverter air conditioner vs split system

Most people tend to turn off their air conditioner units at the wrong time just to save on their electricity bill. Sometimes spending a bit more money when purchasing your split air conditioner or any air conditioner, can end up saving you alot more in the long run!
If you’re leaning towards a mini split air conditioner, one of my advices would be to get one equipped with an “Inverter Technology ” compressor. If you consider the two factors mentioned above you will be saving a lot more electricity than you think. I’m looking around for a ductless system, very helpful article I will for sure be visiting your store. After surviving last year super hot and humid summer in Kolkata, I finally decided to go for Air Conditioners which are day by day becoming important equipment at homes today. As a consumer it became very difficult for me to determine which air conditioners to go with, I mean Inverters or non-Inverters, the one that provides the best bang for the buck and is also extremely energy efficient?
One way was to go the non-Inverter route where air conditioners are rated from 1 ~ 5 stars in terms of efficiency by Bureau of Energy Efficiency (BEE), a statutory body under the Indian Union Ministry of Power. Efficiency of an air conditioner is normally measured as Energy Efficiency Ratio (EER), which is the ratio of the cooling output, measured in British thermal units (BTU) per hour, to the power input (in Watts, and includes all inputs to compressor, fan motors and controls) to operate AC at standard rating conditions. So the higher the EER number better is its efficiency and more costly it’s going to be, due to the use of more advanced technology. Lets assume someone buys a 5 star rated non-Inverter air conditioner in 2011 with COP of 3.1.
The other way was to go for Inverter Air Conditioners which are sophisticated piece of equipment and expensive. At the start up of an air conditioners operation, powerful cooling is required to reach the set temperature. The Inverter air conditioners on the other hand have a full-output operation mode to operate at maximum capacity as soon as they start thus reaching the targeted temperature faster than non-Inverter air conditioners and then drastically reduce energy consumption when the set temperature is achieved by going into energy-saving operation mode and varies the rotational speed of the compressor along with the indoor and outdoor fan motors for optimum performance at all times. Information from in-built sensors of both the indoor and outdoor units measuring temperature and humidity are processed at over 4000 times per second by Inverter air conditioners brain i.e. Since I plan for extended use on a daily basis, I went for Inverter ones over cheaper non-Inverters. But for sensible buyers who want the most out of his rupee find the current landscape to have changed a lot with multiple international air conditioner companies jumping in the lucrative and nascent Indian air conditioner market raising the performance bar even higher with cut throat competition. But the real deal is how much you get at a certain price point (cost versus efficiency) and from that perspective Sharp Inverter's are truly hard to beat. My 1.5 Ton Sharp AH-XP18MV Inverter air conditioners come fully imported from Thailand with an MRP of INR 50K. I immediately dumped the Hitachi for their un-justified pricing and went for Sharp Inverters, other reasons being their excellent customer support and after sales service provided in Kolkata.
I was able to get two Sharp AH-XP18MV, 1.5 tonners at 82K along with complete free installation kits. I found Sharp provides the best and safest installation kits out here, the liquid and gas side copper tubing are of 4 meters in length having class leading 0.8mm thickness which is super thick along with superior 4 meters of XPE insulation(white), 4 meters of 4-core electric wire, 4 meters of drain pipe et-al. I love their new concept of the cross-flow fan design as found in the indoor units of AH-XP18MV, it is inspired by nature and Sharp calls them NatureWing. While comparing different outdoor units I found Sharp is using a higher cooling capacity compressor for its class with advanced compressor control technology, which adopts a 180° conductance sine wave instead of the conventional 120° conductance waveform, resulting in a smoothing of motor rotation.
Unlike the capillary used in non-Inverter air conditioners which allows free flow of the refrigerant gas, the Sharp Inverter's controls the flow according to the load needed by using superior Electronic Pulse Linear Expansion Valve.
All-aluminium canalicular tubed condensers as pioneered by Sharp in the air conditioner segment are the next step towards advanced technology and improved efficiency where the refrigerant enters multiple tubes at the same time, therefore enhancing the air conditioners performance and reduce the power consumption. Being all aluminum the outdoor units of Sharp 1.5 Ton Inverter's weighs just 35 kilos having a much smaller footprint with reduced weight.
Sharp Inverters not only have the best cooling performance in 1.5 Ton category, it has one of the widest cooling capacity range.
One very important aspect to note is Inverter air conditioners are not star rated in India due to their variable cooling capacity and power consumption which results to variable energy efficiency. Since I installed the Sharp Inverter air conditioners during last winter months I am refraining as of now to provide a conclusive personal review. Anyway just thought it will be useful to provide this link below which I found very useful and helps in decision making. I have been toying with the idea of replacing my air conditioners with inverter types this summer. We have now power off and isolate the air conditioner at the first sign of thunder and lightening. I just thought of sharing the knowledge and experience I acquired during my air conditioners buying exercise.
I find there are lot of misinformation regarding air conditioners floating around forums mainly due to half baked knowledge of the FMs.
With the advent of Inverter air conditioners, which are true digitally controlled electro mechanical devices it became super complex with complete dependability on their digital controller module. But their benefit cannot be overlooked in Inverter air conditioners as they are now capable to control all the electro mechanical devices like compressor and motors to provide superior cooling while consuming the least amount of energy required. The European Directive on Batteries and Accumulators aims to minimise the impact of batteries on the environment and encourage the recovery of the materials they contain. The battery symbol on a product or on its packaging indicates that the product must not be disposed of with general household waste.
All Samsung products that are subject to the Batteries Directive are compliant with the UK battery and accumulator Requirements. The Samsung Air Conditioner’s unique triangular design improves its performance, circulating cool air faster, farther and wider* around your home.
The Samsung Air Conditioner has been designed from the ground up to be outstandingly efficient.


Following Samsung’s tradition of making durable and energy saving products, the Triangle Digital Inverter AC range promises 10 year warranty on Digital Inverter Compressor, thus giving its customers a complete peace of mind. The Samsung Air Conditioner begins cooling the air fast using its powerful Fast Cool mode, so it gets there quickly. It then automatically changes the mode to Comfort Cool to maintain the desired temperature. So you won’t feel cold and don’t have to keep manually changing the settings or turning the Air Conditioner on and off.
The Samsung Air Conditioner’s Single User mode uses less compressor capacity, reducing power consumption*, while still providing a cool and comfortable environment. The pure Crystal Gloss™ finish and uniquely curved design of the Samsung Air Conditioner deliver a premium look and performance. The previous, is completely understandable considering the economic events we are going through in today’s world.
By doing so, you make sure you’re buying a unit that’s energy efficient and on the long run or even on the short run you will see it making a big difference. Inverter compressors operate at adaptable speeds instead of constant ones like the other conventional types.
My first product was a microwave and now it’s a Panasonic split air conditioner, they are Energy Savers! With increasing demand and widely available EMI schemes, it has mooted variety of brands and products availability in the market.
Affixing BEE star label has been made mandatory by BEE to all the manufactures for the benefit of general public, showing the level of energy consumption by the non-Inverter air conditioner both in terms of absolute values as well as equivalent number of stars varying from one to five, in accordance with BEE stipulation.
This provides a highly precise method of maintaining the set temperature and drastically reduces wasteful cooling operation and energy consumption. Digital Micro-computer Module which then maintains targeted room temperature and humidity by constantly controlling the voltage, current and frequency send to the compressors having highly energy efficient DC motor using magnetic force to operate the compressor rather than conventional AC motor used in non-Inverters in conjunction with the electronic pulse linear expansion valve to precisely control coolant pressure for more efficient heat exchange. The hard earned money one pays for Inverter air conditioners are put in using much better quality components which never came with non-Inverters, reaping their benefits in terms performance and efficiency with significant reduction in power consumption.
One will be astounded to learn in Japan almost all air conditioners are Inverter ones where as in India the same Japanese air conditioner companies sell normal non-Inverter 5 star rated air conditioners at same price of Inverter air conditioners since very few people know about the real benefits they offer in terms of cooling performance, efficiency and low power consumption under part load conditions. In Japan, people do not think about how many hours they are going to use them, they just buy Inverter air conditioners. LG uses the most advanced technology of all Inverter air conditioners currently available in India and one will be a lucky to get their 1.5 Ton version at less than INR 54K. The indoor unit looks gorgeous, has amazing cooling performance capability and just oozes quality. After adding two pairs of best after market ODU brackets and installation charge, total damage to my wallet rested at INR 87K. Our installer (he is a very experienced professional being in this air conditioner installation business for over 30 years) said the pipes will last a lifetime and no company even Daikin & Hitachi provides the copper pipes of similar quality to connect the indoor unit to the outdoor unit as provided by Sharp. The fan feature blades modeled on the shape of dragonfly’s wings which have ridged surfaces that generate minuscule air eddies during flight. This greatly reduces energy loss and noise, contributing to higher efficiency, and thus higher energy savings. Other manufacturers like Hitachi, Daikin and Panasonic uses bulky, less costly, age old, less efficient copper-aluminum condensers with circular tubing to save cost. Such efficient condensers with high heat capacity have long been used in cars and are designed with increased surface area and less resistance to airflow enabling improved thermal efficiency and much better performance compared to copper-aluminium circular tubed condenser.
In contrast the similar 1.5 Ton Inverter outdoor units from Daikin are much bigger and weigh 47 kilos!!!
Hats off to LG to perform such a technically daunting task for controlling a 6 kW compressor to run smoothly at just 0.9 kW!!! In other words the Inverters have varying efficiency and as much the air conditioners can reduce its cooling capacity greater will be their overall efficiency. And that too it is an Inverter which means it will provide better cooling performance than a 5 star rated non Inverter air conditioner of 2017 while consuming much less power!!!
Even though the air conditioners are chilling the rooms as of now in no time, let the summer heat of April, May and June arrive and then only I believe a conclusive personal review can be written.
If this works fine in chennai heat in the next month or so, I will plan one for my house as well. As always I do a lot of study while buying consumer electronic goods and I believe it paid off in having the right AC at the correct price. I do not imply them to be ignorant; they never did a through study and just went after brands. Previously non-Inverters were just electro mechanical devices which were super robust but their downfall was power consumption. As with all digital and electronic devices they are very susceptible to voltage change and natural calamities like thunder storms and lightning are a complete no-no. It is the overall efficiency that has drastically improved with the inclusion of these digital micro controller modules. Instead, it is the consumer’s responsibility to dispose of their waste batteries at a designated collection point so that they can be recycled. In accordance with national law, SAMSUNG Electronics (UK) Ltd is a member of an approved batteries producer compliance scheme. Its Digital Inverter also provides significantly greater energy efficiency.** And its Virus Doctor and Easy Filter eliminates dust, contaminants, allergens, bacteria and viruses*** - firstly using a filter and secondly with Virus Doctor. It also improves the look of your home since one doesn’t need to install a separate stabiliser. It can maintain the desired temperature without frequently shutting off and on, so it consumes less energy. So you can use it when you’re alone, even during a hot day, without worrying about the electricity bill.


The filter is designed in such away that it is easy to lift the filter, clean and put it back on the AC.
If you are a consumer that wants to save energy, money on your electricity bills and make the environment a better place then inverter technology is the right choice for you. Energy Star approved air conditioners save up to 20 to 30% more energy than the other types that to not carry the label.
Some of the brands that can be found in the market are Mitsubishi, Hitachi, Daikin, Panasonic, Sharp, LG, Carrier, O-General, Toshiba along with several indigenous brands like Voltas and BlueStar. The greater the number of stars on the label, higher the appliance energy efficiency and lower its electricity consumption. A conventional non-Inverter air conditioner can only operate at a constant speed which is too powerful to maintain the set temperature.
High quality DC motors are also used in the indoor and outdoor fan units instead of AC motors to save energy, all being controlled by the same electronic digital micro-computer module. After haplessly wandering in the forums for a month or so I understood people in India are still happily using stone age star rated non-Inverter technology filled with R22 gas where as the world have moved on to a whole new level with Inverters, filled with energy efficient and environmentally friendly R410A refrigerant gas. Hitachi have an unprecedented reputation in India which they built through the last two decades when there was simply no competition at their level on Indian market by providing excellent products at sky high prices. In the Inverter air conditioner market I find Hitachi and Daikin as just two players along with Sharp, Panasonic, LG, Mitsubishi and Carrier. The compressor of this Sharp Inverter comes enclosed inside a acoustic jacket to eliminate noise and makes the outdoor unit very quiet. These galvanic corrosion resistant all-aluminum condensers also calls for special outdoor fans and motors for proper heat expulsion. You can also opt for 0% EMI schemes available, then I believe you can buy three or four at one go.
Later with the advent of high quality five star rated non-Inverter air conditioners we found the electronic modules started to feature on these devices controlling various features of the air conditioner. The separate collection and recycling of batteries at the time of disposal will help to conserve natural resources and ensure that they are recycled in a manner that protects human health and the environment. Data has been measured under specific testing conditions and may differ based on environmental factors. The improved width and angle of its outlet, extra v-blades and a bigger fan also ensure that air is cooled and expelled faster, farther and wider*.
The Digital Inverter helps you to stay comfortable for long periods of time, while using the minimum amount of energy *. Inverter air conditioners tend have longer life spans in general due to their speed control capabilities. Every brand offers non-Inverter air conditioners with variety of functions such as antibacterial air purifiers, anti-odour, energy efficiency where as the best offers of them offers newer and advanced technology like Inverter air conditioners.
While selecting the non-Inverter air conditioner refer to the BEE Star Rated Label affixed is must. So we find EER star rating of non-Inverter air conditioners to be an ever moving target and its star rating is respective to the year a particular model was released.
Thus, in attempting to achieve this, non-Inverter air conditioners switches the compressor ON and OFF repeatedly.
This is very important since it is the moisture removed from the room which actually produces the feeling of cooling.
Amazingly even today with their extra-high quoted price people go by hype and buy them blindly because it’s a 'Hitachi'. These new dragonfly wing shaped fan blade optimally harnesses the flow of air to boost air circulation efficiency by approx 25% to their older models. It is so quite that it becomes hard for me to guess from a distance whether it is running or not until the ODU fan starts rotating. This is the reason why dealers say a 1.5 Ton Inverter will suffice for a 2 Ton non-Inverter.
It also helps in maintaining a constant temperature unlike typical temperature change that occurs with non-Inverter air conditioners. Thus Sharp outdoor unit employs a newly shaped fan blade which is based on the aeronautical theories of NASA run by highly efficient DC fan motors which in-turn are controlled by the digital micro-computer module.
This results in wider temperature fluctuations leading to wasteful consumption of electrical energy. If the air conditioners can effectively remove enough moisture from the room it will produce a feeling of comfort. And if one can really really bargain like me, he will get them at 41K, below which the dealer will simply refuse to sale since their profit margin falls below 1K. The indoor unit is super quite in Auto Mode and only when I select Super Jet function do I hear jet stream of air gushing out!!! Furthermore, the Digital Micro-computer Module helps in maintaining the room temperature within a 0.5 degree centigrade variation of the set temperature.
The redesigned fan blade cross-section with an ideal streamline greatly increase “lift” (the principle by which airplanes fly), thereby achieving a high rotation efficiency of 120–170% compared to their previous outdoor fans having superior blowing performance.
In comparison the best price I got for the Hitachi i-Clean non-Inverter 1.5 Ton, 5 star air conditioner was a sky high 42K where as their i-Tec Inverter 1.5 Ton costs an earth shattering 56K!!! The AH-XP18MV indoor unit is capable of achieving a max airflow rate of 16.8 CMM (cubic meter per minute) resulting in strong chilling windblasts.



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