Using temperature setbacks with air conditioning systems can lead to significant energy savings. Temperature setbacks involve adjusting the thermostat settings to allow slightly higher indoor temperatures during specific times when cooling is not as critical, such as when you're away from home or during nighttime when outdoor temperatures are lower. Here are some potential energy savings from using temperature setbacks:
Reduced Cooling Load: By raising the indoor temperature during periods of lower occupancy or cooler outdoor temperatures, the air conditioning system has to work less to maintain the set temperature. This reduces the cooling load on the system and results in energy savings.
Decreased Runtime: With temperature setbacks, the air conditioner will run for shorter periods or less frequently. This reduced runtime translates to less energy consumption and lower electricity bills.
Avoiding Peak Demand: Temperature setbacks can help you avoid running the air conditioning system at peak demand times when electricity rates may be higher. This can lead to cost savings by taking advantage of off-peak hours.
Improved Efficiency: Air conditioners generally operate more efficiently when the difference between indoor and outdoor temperatures is smaller. Setting the thermostat to a higher temperature during cooler times can improve the system's efficiency.
Longer Equipment Lifespan: Reducing the runtime of the air conditioning system through temperature setbacks can help extend the lifespan of the equipment since it experiences less wear and tear.
The amount of energy savings achieved through temperature setbacks depends on various factors, including the climate, the extent of the temperature setback, the thermal properties of the building, and the efficiency of the air conditioning system. Generally, a temperature setback of around 7 to 10 degrees Fahrenheit (4 to 6 degrees Celsius) during extended periods of absence (e.g., when you're at work or on vacation) can lead to noticeable energy savings without sacrificing comfort.
It's essential to strike a balance between energy savings and comfort. Extreme temperature setbacks may lead to discomfort and might cause the air conditioning system to work harder to cool the space back to the desired temperature, potentially offsetting the savings. Programmable thermostats are valuable tools for automating temperature setbacks and optimizing energy efficiency. They allow you to pre-set temperature profiles based on your schedule and preferences, ensuring that your home is comfortably cooled when you're there while saving energy when you're away.