How To Install Air Conditioning

What does it take to install air conditioning?

It is becoming more and more apparent that, even here in the UK, air conditioners are a necessity for both homes and businesses during the sweltering summer months. Pollution, noise, and the proximity to others in urban environments means you can no longer just rely on open windows or the availability of a rotating fan. Office workers and residents alike need to have some sort of air-cooling system in place.

First Choice air conditioning are adept at the setup and installation of different types of air conditioning systems. Portable air conditioners are realistically the only type of air conditioning equipment users can install personally due to other types of air conditioning installation requiring the use of specialist tools, such as vacuum pumps, pressure gauges, refrigerant bottles, electric meters, flare tools and professional equipment for drilling holes. However, the instructions provided must be followed exactly during installation and there are often a few confusing points so here is our quick guide to how you can do this yourself.

For the purpose of this how to install air conditioning guide we’ll be looking at what First Choice Air Conditioning term Floor Standing Air Conditioners.

Install Air ConditioningNot only are floor standing air conditioning units able to be installed by users they also provide a unique advantage in that they can be installed in locations where no wall or ceiling space is available. These floor mounted air conditioning units are widely used for domestic installations in conservatories, kitchens and living areas. The design means these units also work excellently in heating mode due to the blown air outlet being low to the ground as well as an outlet to the top of the unit, this gives a good distribution of warm air before rising upwards to heat the room.

Floor standing air con units provide immensely powerful airflow and are quick to install, which can save you money, their main benefits are:

  1. Easy to install
  2. Outlets fit in all different types of windows
  3. Portable air conditioning and heating feature can be used year round
  4. Can be placed in a bedroom or living room to keep extra cool without turning down the thermostat to the whole house


The number one reason that portable air conditioner units are returned to stores is because consumers do not realise that these systems must be vented. This is because the air conditioning process requires the warm air to be pushed outside. With adequate venting you can install a unit virtually anywhere.

Step 1: Purchase a unit that fits

This seems obvious but ensuring you have the space for your desired unit is often overlooked as you must remember that these units need to have an outlet, whether that be outside a vertical window, a hole in the wall, or out through a drop ceiling. First examine the openings in your house, workplace or apartment before purchasing your unit.

Step 2: Setup the outlet

If you are going through a pre-drilled hole in the wall, you can just feed your outlet through this. If drilling a hole, you will need to use a large hole saw and impact drill. Vent sizes vary so be sure to measure this and drill your hole 5mm larger than your outlet diameter.

If you are going out through a window, then whether you have vertical sliding windows or horizontal casement style windows you’ll need to setup a window outlet kit This first involves cutting a foam strip that is supplied with the window kit to the proper length. Next attach the foam piece to the window part that moves. Once the foam is in place insert the actual plastic window piece and close the window tight. Pull out any expansion pieces so that there is a nice tight seal between your room and the outside world.

Step 3: Secure and seal

For hole-in-wall installation run a thin bead of caulk between the ducting and the sheetrock. If the crack is exceptionally large, you may need to use an expanding foam. You can then apply thin weatherstripping to the edges of the underside of the vent which will reduce air-infiltration and create a more energy-efficient enclosure. The vent should then be capped as per the manufacturer’s guidelines.

For window installations most window kits are particularly good when it comes to securing the vent panel and expansion pieces as they recommend screwing them into place with supplied screws.

Once the window kit is solidified, insert a foam seal between the glass and windowpane as a precaution against air and insects entering the room.

Once the window kit is in place the final steps to install a portable a/c are nothing more than applying a security bracket to the window so it cannot be opened from the outside, hooking up a vent from the air conditioner to the window panel, and plugging the system into a grounded outlet.

Step 4: Final setup

There is usually some maintenance involved with a portable air conditioner install, mostly draining the condensed water, unit settings and figuring out how the remote control works but once completed you will find these units are very convenient.

And that’s about it – remember that these units while being great are not usually the best option for lager commercial installations.

And of course, if you are not confident installing a portable system yourself then First Choice Air Conditioning are always on hand to assist you or even just answer your queries. Just contact us or give us a call on 07944 458 905


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