Popular varieties of residential cooling systems include: central air units, split system air conditioning heat pumps, window air conditioners, and portable AC units. Central air conditioners are a favorite as they cool an entire home while split system units save money by cooling only a small section of a home, as needed.

Window AC units come in a variety of sizes and features and provide considerable comfort. Some models have three fan speeds and multiple cooling options to adapt to changing weather environments. Capacities range from small room size to

Some units have a programmable timer that lets you set the unit to turn on and off at specific times, helping you reduce energy consumption. Smart air conditioners can be controlled via your phone and connected app. Mechanical controls allow you to manually adjust fan speed and cooling level with ease.

An evaporative cooler (swamp cooler) is a device that cools air through the evaporation of water. Evaporative cooling differs from other air conditioning systems, which use vapor-compression or absorption refrigeration cycles. Evaporative cooling exploits the fact that water will absorb a relatively large amount of heat in order to evaporate.

They are appropriate for dry climates, They can offer four to six tons of cooling with an energy consumption of 1,200 watts. Its energy efficiency is two to three times as efficient as the best conventional air conditioners.