In most building projects, the compressor expansion tank should be placed in an area where there is an opening for the air to pass through the expansion tank. When the tank is full, you will not be able to use the space for your air conditioning system. The best spot is a corner in the floor. Then when you need the air conditioning system, it is possible to open the tank to release the pressure and allow the air to circulate. This will allow you to get the needed air.
Although, it is very important to have a compressor expansion tank, it is not necessary to have a compressor expansion tank that is the same size as the compressor. In fact, it is not even necessary to have a compressor expansion tank of the same size as the compressor itself. The reason why the compressor expansion tank is beneficial is because if you want to replace the compressor, the tank will save you money and time. It is very likely that if you replace the compressor, you will also replace the expansion tank. You will need to determine if you want to invest money or time to replace the compressor and then removing the expansion tank. It would be very useful to determine this prior to starting your project.
A compressor expansion tank will also save you money if you are planning on purchasing a new air conditioner. Because the tank can be filled from the ground up, you do not have to purchase a new unit when you get it, therefore saving you money on the purchase. Furthermore, you can fill the tank yourself with propane if you would like to do so. You can also make a sandwich or a pan full of sand and propane and just fill it up with water and propane to work the same way. This will save you a lot of money.