Using two 12000 BTU air conditioners instead of one 24000 BTU unit for less electricity consumption depends on various factors and the specific situation. Let's analyze some considerations:
Efficiency of the Units: The efficiency of the air conditioners plays a significant role in determining their energy consumption. Generally, newer models are designed to be more energy-efficient. Compare the Energy Efficiency Ratio (EER) or Seasonal Energy Efficiency Ratio (SEER) of both 12000 BTU and 24000 BTU units to see which one consumes less electricity per cooling output.
Cooling Load: The cooling load refers to the amount of cooling required to maintain a comfortable temperature in the space. If you have a smaller area that needs cooling, using two 12000 BTU units might be more energy-efficient as they can be operated independently to cool specific zones, allowing you to cool only the areas that require it.
Insulation and Windows: The insulation quality of the building and the number of windows can significantly impact the cooling load. A well-insulated space with fewer windows will require less cooling capacity.
Number of Rooms: If you have multiple rooms that need cooling, using two 12000 BTU units might allow for more flexibility, as you can choose to cool only the rooms in use.
Maintenance and Repairs: Having two separate units means that if one breaks down, the other can still provide some cooling. On the other hand, a single 24000 BTU unit failure would result in complete loss of cooling until it's fixed.
Initial Investment: Buying two 12000 BTU units may be cheaper than purchasing a single 24000 BTU unit, depending on the brand and model.
Ultimately, the best approach to reduce electricity consumption is to choose an air conditioner with the right cooling capacity for your needs and to ensure that the unit is properly sized and well-maintained. Oversized air conditioners may lead to inefficiencies and increased energy consumption. It's recommended to consult with a professional HVAC technician to determine the appropriate cooling capacity required for your specific space and usage patterns. They can help you make an informed decision on whether to use multiple smaller units or a single larger unit for optimal energy efficiency and comfort.