7 important guidelines for split AC installation

Window AC uninstall

The installation of the split air conditioners is a crucial job. If the installation is done accurately your air conditioner will give optimum cooling, but if it is not done properly you won’t get the desired cooling effect. A poor installations also leads to frequent maintenance problems.

Several factors have to considered during the installation of split air conditioner.

Strength of wall to hold the AC

The indoor unit of split AC must be installed on a wall strong enough to hold the unit’s weight.

Proper spacing between wall and AC unit

The indoor unit of split AC requires at least 15 cm of open space surrounding its top and sides for proper air flow.

Appropriate installation height from ground

Mount the indoor unit of split AC at a height of 7-8 feet above the ground for adequate cooling inside the room

Correct tilt angle of indoor unit

While fixing the aluminum bracket on wall make sure that the bracket is given a slight tilt angle, so that the indoor unit of split AC, when fitted is also at a slight angle to enable unrestricted flow of the condensed water from the drain pipe.

Correct location of outdoor unit

For proper cooling, mount the indoor and outdoor units of split AC at location away from direct sunlight and water. Install the outdoor unit of split AC in open space so that there is no hindrance to the heat dissipated from the condenser.

Proper placement of outdoor unit

The outdoor unit of split AC must be placed on a flat and rigid surface. This unit contains key components of split AC like compressor, condenser, fan motor etc. If the unit is not on a flat surface then it will vibrate excessively, which can lead to the breakage of copper pipes, coolant leakage and compressor/condenser damage. Further, the vibrating unit makes lots of noise which could disturb you and your neighbors.

READ ALSO:  How is AC gas filling done? The complete guide

Right distance between indoor and outdoor unit 

Correct distance between the indoor and outdoor unit plays a very important role in cooling. The coolant at very low temperature flows inside the copper tubes between indoor and outdoor units of split AC. There is always some loss of cooling effect to the atmosphere when the refrigerant flows between the units. Hence to reduce this loss, keep the distance between the indoor unit of split AC and the outdoor unit of split AC as minimum as possible. The maximum allowable distance between the indoor and the outdoor units of split AC can be about 15 meters.

Here are some of the tools/fittings that will assist you better when installing an AC.

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    I have heard from a person who installed Air Conditioner at my place…. he quoted that the copper pipes between indoor unit and outdoor unit must be of minimum 10ft. of length as it is made mandatory by the companies who produce ACs and compressor takes extra load with shorter lengths of copper pipes and becomes hot.
    But by logic and reasoning, I find this argument as baseless because lesser the travelling of the gas the greater would be the cooling as the loss would be minimum…. Anyone please suggest some sense and reason in support or against my query..!!!!!!!!!!

    • 4

      You technician is right!!..Minimum 10 ft distance is required so that the gas cycle can be completed between indoor and outdoor units properly.

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    Thanks for your valuable information. I would like to know whether there is any issue of leveling ( relative heights) of indoor and outdoor units.

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    The Article on 7 important guidelines for split AC installation os really amazing . Thanks for Sharing the information . Can u explain more about the features

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    this may seem a silly question but would highly appreciate advice on the matter;
    I am planning on installing split ACs into my bedroom but am planning on some renovations including painting and such. Is it advisable to install the AC and then finish the painting of the walls or the other way around since there will be drilling done to the wall etc.
    Input would be much appreciated

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    These are very important steps. I specially recommend people who are buying first time should read this and follow the steps. I will help in smooth installation of AC.
    Avoiding small points sometimes may cause problem later and you will end up paying money for repair. So follow these steps.

    • 15

      I want your help in installation of split AC in my room above my cabinet. The space available on the cabinet for indoor unit is L-92″, H-26″, D-22″ .
      Connection to outdoor unit has to pass through 30″ (approx.) width of the beam.
      Can you guide me?

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    Service cantre वाले खुद 400₹ , में कचरा काम करवाते हैं , साख कंपनी की गिरती है ,

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    I am from Paradip, Odisha, a coastal town. Need to install a split AC – 2 Ton capacity. Cost of running (electricity) is unimportant. Need advie on selecting an AC which will provide good service, will not be affected by corrosion (especially the condenser part). The price range should be less than 60-65 K (in online)

    Please advise about the brand & model.

    With regards

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    We bought split ac but theven distance between indoor and outdoor is parallel and it is only at the other side of the wall.maybe less than 1 meter. Is there any problem in this?

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    I installed split AC in second floor .

    I installed outdoor unit in first floor 7 meters below the the AC.

    Is it affect the efficiency of AC like cooling affect etc..?


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    Outdoor unit is installed in direct sunlight, what harm will be done to outdoor unit?
    Also, the installation team put no screws to support the outdoor unit, it is jus placed on a small roof outside room window, are there chances unit may fall down, it’s on second floor?

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    I cannot take the outdoor unit connection by making the opening right behind the indoor, can the pipes come out from below the a/c and then exit through a wall on the right?

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    the outdoor unit of the split unit is actually kept out side a room with lattices on the roof of the building open to sunlight but one of our managers recommended to install it inside the the room with lattices as he says it will get enough air for the outdoor unit to work .The room gets filled with dust on a regular basis. what do you recommend?

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    I am planning to get an AC installed in my bedroom and was wondering which is the best position for the indoor unit. It should either be the wall behind my bed (AC unit above my head) or the one opposite to it (AC unit facing the bed) which are about 15 Feet apart.

    Any thoughts on which would be the ideal choice?


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    i have recived ac from flipkart which i orderd 1 ton but they have send otdoor unit 1 ton and indoor unit 1.5 ton if i will fix in this combination is theare any problem

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