What is Single-Stage vs. Two-Stage Cooling?
There are two kinds of air conditioning systems to choose from — single-stage and two-stage. Your climate will determine which stage is best for your home. Single-stage air conditioners turn on at full capacity when your home’s indoor temperature rises past the set level on your thermostat. It then turns off completely until your house rises past that temperature again and repeats the process. This is good for climates that don’t fluctuate much in temperature. In hot, humid climates with pulsing solar rays, the air conditioner will turn on often to compensate for the heat outside. This will lead to a lot of loud noises and an increase in your utility bill.
Two-stage air conditioners function at two-thirds or complete capacity, depending on the home’s internal temperature. When your house rises above the preset temperature, it will turn on at two-thirds capacity and work its way to full capacity. Then, it will come down from full capacity to two-thirds capacity and shut off. This saves power and cools your home at the same time. It also reduces noise and emits cleaner air, which makes it the more efficient option for most homeowners.