Air conditioners come in a variety of shapes and sizes, but they all operate on the same basic premise. An air conditioner provides cold air inside your home by actually removing heat and humidity from the indoor air. It returns the cooled air to the indoor space, and transfers the unwanted heat and humidity outside. A standard air conditioner or cooling system uses a specialized chemical called refrigerant (Freon/Puron), and has three main mechanical components: a compressor, a condenser coil and an evaporator coil which is located indoors and is connected to the furnace.

To put in simple words:

The outdoor unit (condenser) will cool the indoor unit (coil). Once the coil reaches a desired temperature, the fan will start blowing the cold air through the indoor coil and throughout the ventilation system (Air-Ducts). This cycle continues until your home reaches the desired temperature set on the thermostat.
The condensers efficiency is rated by SEER (Seasonal Energy Efficiancy Ratting). The higher the SEER number is on your unit, the less energy it will consume
At GreenLand we offer a large variety of high efficiency air conditioners from all brands in different sizes (Tons) and multiple SEER options to fit your indoor cooling needs.