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An Intelligent Buyer's Checklist for a Long Lasting and Durable Split Air Conditioners:

Star Ratings
Right Tonnage for your Room Size
Copper Tubes in Indoor & Outdoor Units and Connecting Tubes
Reliable Brand
Price Range

While most buyers check for star ratings, tonnage, key features, brands and price range at the time of selecting a perfect air-conditioner, it is important to note that the efficiency, performance, running cost and lifespan of a room air-conditioner is always highly dependent on two basic factors; Star Ratings and choice of metal used in the condenser coil, evaporator coil and connecting tubes.

A Thumb Rule to select right capacity AC for your room size

AC Capacity (Mumbai) Floor Area
3515 Watts (1 Ton) 100 sq.ft. to 120 sq.ft.
5275 Watts (1.5 Ton) 150 sq.ft. to 175 sq.ft.

Actual heat-load study is recommended to ascertain the correct capacity


Choice Of Metal Used In The Condenser Coil - For A More Cost-Effective, Eco-Friendly AC

Every outdoor unit comprises of condenser coils that need to be cleaned and maintained regularly. Condenser coils made of copper tube or aluminium fin are easy to clean, thus protecting it from heavy penalties like dust choking, gas leakage, major drop in performance and efficiency of the air-conditioner, shorter life for the room AC, higher electricity and maintenance bills.



Q. Which part of the split air-conditioners have copper tubes?

A. Tubes in the following three components need to be made of copper:

  • Copper tubes in evaporator of indoor unit
  • Copper tubes in condenser of outdoor unit
  • Copper tubes as connecting pipes between indoor and outdoor units
All air-conditioners use copper tubes for the indoor units, however substitution usually takes place in in outdoor unit and connecting tubes.



Q. What are the advantages of having all copper tubes in split air-conditioners?

A. Copper has been a proven metal for all types of cooling and heating appliance for decades. Some of the key advantages are:

  • Corrosion Resistance: Copper as a metal lasts long in corrosive environment as compared to alternative metal used in air conditioners. Corrosion takes places in area prone to salty air which is typical of coastal region, dust and pollutions, and fumes from sewerages.
  • Easy to Maintain: Outdoor units are prone to dust and dirt accumulation which needs to be cleaned periodically. A fully chocked condenser can be cleaned with high water pressure in case of copper tube condenser which is not case with alternative alloy condenser.
  • Repairable: In case of leakage in condenser or connecting tube made of copper, it can be repaired on-site by the service mechanic. On the other hand, condenser made with alternative metal cannot be repaired and has to be taken to workshop or replaced thus depriving of cool air till the machine is put to operation after repair or replacement.
As copper is corrosion resistance and can be cleaned easily, it is more durable and maintains the energy efficiency in the long run.



Q. Why are the air conditioning systems in automobiles are made of alternative metal and functions with limited issues?

There are several reasons for having condensers made of alternative metal in automobiles. First, the fraction capacity in terms of tonnage is much smaller as compared to room air conditioners. Second, the refrigerant used is of low pressure and thus there are low changes of leakage. Third, the condensers in automobiles are kept in a totally enclosed box thus protecting it from outside impurities. Last, it is easier to take an automobile to a workshop and get the faulty condenser repaired during periodic service.

Key Attributes Copper Tubes in Indoor & Outdoor Coils Alternative Metal in Outdoor Coils
Long Term High Energy Efficiency
Durable & Longer Life
Easy to Maintain & Clean
Lower Maintenance
Corrosion Resistance from coastal, polluted, dusty and tropical weather areas

Look for similar Cu stickers on Air Conditioners while buying ACs this Summer


Several Brands are doing Self Copper Branding

To View the list of ACs available in India along with their type of condensers
Click Here

Tips to Maintain your AC this Summer

India's economic growth has empowered the average middle-class family to afford a comfortable and healthy lifestyle. Air conditioners, once considered a mark of luxury have now become easily accessible to middle-class. They are found in every Indian household, in both metro and non-metro cities.
With the introduction of new technology, health benefits and energy efficiency, consumers have become aware of the need for an AC. Today they have a wide-range of brands and product offerings to select from.
It is essential to keep in mind some important points, while installing air conditioners at your home:

  • Air conditioners should be installed where there is enough space for maintenance. If it is installed in a cramped space, the maintenance would be difficult which would eventually hike the electricity bills.
  • It is necessary to install the unit under a shaded area as it will prevent direct sunlight on the air conditioner


Indicative annual energy bill and power consumption of various star labelled ACs:


Basic Parts of Split Room Air Conditioners

The main function of air conditioner is to maintain comfortable indoor environment. Air conditioners deliver comfortable indoor environment by delivering the following three functions:

  • Maintaining comfortable room temperature
  • Maintaining humidity levels
  • Evenly distributing air across the room
  • Delivering filtered pure air inside the room.

Air conditioners rely on the fundamental property of gases to cool the surrounding air. As the pressure on the gases decreases, they expand and cool; increasing the pressure makes the temperature rise. These changes can also be called as evaporation and condensation. Thus, the two components of split air conditioners are known as evaporator unit (indoor unit) and condenser unit (outdoor unit).




The outdoor unit of split room air conditioners contains the most important parts of split room air conditioners such as condenser, condenser fan and compressor amongst others.

Function of a compressor in air conditioners is very similar to a human heart. It compresses the refrigerant by increasing its temperature and pressure before sending it to the condenser.

Condenser Coil
The high temperature and high pressure refrigerant from the compressor comes in the condenser where it has to give up the heat. Condenser coils typically made of copper or other metals that easily transfer heat. Your air conditioner runs more efficiently when excess heat leaves the system quickly, so keeping the coils clean will lower your utility bills and lengthen the lifespan of your air conditioners. Outside units are susceptible to collecting dust, pollen and other debris, but they are easier to clean than interior coils. Keeping the coils clean is vital to proper heat exchange. When dust and debris collect on coils, the particles form an insulating layer that prevents refrigerant to condense. It is very important to note that it is very easy to clean condenser coils made of copper tube and aluminium fin due to its design. On the other hand, cleaning a coil made up of alternate materiel is really difficult and this leads to dust choking, gas leakage and drop in efficiency and thus affects the life of the room air conditioners, increases your electricity and maintenance bill.

Condenser Cooling Fan
The heat generated within the compressor has to be thrown out else the compressor will get too hot in the long run and its motor coils will burn leading to complete breakdown of the compressor and the whole air conditioner. Further, the refrigerant within the condenser coil has to be cooled so that its temperature becomes low enough to convert the gas into liquid form.



The connecting piping which connects the indoor and the outdoor unit is made of copper tubing. The refrigerant at low temperature and low pressure leaves the capillary tube enters the evaporator or the cooling coil at the other end.

The connecting tubing is made up of copper since it is highly ductile and malleable element. The copper tubing can be easily bent as they are flexible enough so they can turn into angles and connected easily. The copper tubing used for condenser and evaporator facilitate high rate of heat conduction.


Functioning of the indoor unit results into cooling effect inside the room. The connecting tube supplies liquid refrigerant to the evaporator coil through expansion device called capillary tube. The hot air from the room passes through the evaporator coils leading cooling effects. The evaporator coil is a copper coil made of number turns of the copper tubing with one or more rows depending on the capacity of the air conditioning system. The cooling coil is covered with the aluminium fins so that the maximum amount of heat transfer takes place and room is delivered with cooled air. Your AMC service provider cleans evaporator and condenser coils and thus enabling it to perform at its best.

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