AAC, or Autoclaved Aerated Concrete, can help save energy consumption in several ways:

1. Insulation: AAC has excellent insulation properties, which means that it can help regulate the temperature inside a building. In hot climates, AAC can help keep the building cool by blocking heat from entering, while in cold climates it can help retain heat and keep the building warm. This can help reduce the need for heating and cooling systems, which can save energy.
   
    Autoclaved aerated concrete (AAC) blocks with low thermal conductivity and high heat resistance can serve simultaneously as the building’s wall and insulation (without an additional insulation layer). This may be one solution to reduce the cooling peak without trapping heat inside the building.
   
   AAC’s excellent inherent thermal insulation properties reduce the need for space heating and cooling, thereby cutting carbon dioxide emissions and combating climate change, and making the use of additional insulation materials unnecessary. 
   
   

   The amount of energy savings that can be achieved by using AAC (Autoclaved Aerated Concrete) blocks will depend on several factors, such as the climate, the size of the building, the building design, and the type of heating and cooling systems used. However, studies have shown that using AAC blocks can lead to significant energy savings compared to traditional building materials.

   
   

   According to one study, a typical building constructed using AAC blocks can reduce energy consumption for heating and cooling by up to 30% compared to a building constructed using traditional concrete blocks. This is due to the excellent insulation properties and high thermal mass of AAC, which can help regulate the temperature inside the building and reduce the need for heating and cooling systems.

   
   

   Another study found that using AAC blocks in construction can lead to a reduction in energy consumption of up to 50% compared to traditional brick or concrete block construction. The study also found that AAC construction can lead to a reduction in carbon emissions by up to 60%.

   
   

2. Thermal mass: AAC has a high thermal mass, which means that it can absorb and store heat. This can help regulate the temperature inside a building by releasing heat slowly over time. This can help reduce the need for heating and cooling systems, which can save energy.
   
   

3. Lightweight: AAC is a lightweight material, which means that it requires less energy to transport and install compared to heavier building materials. This can help reduce the carbon footprint of the building and save energy.

4. Durability: AAC is a durable material that requires less maintenance compared to other building materials. This can help reduce the need for energy-intensive repairs and maintenance, which can save energy.
   

Overall, AAC can help save energy consumption by providing excellent insulation, thermal mass, being lightweight, and requiring less maintenance. By using AAC in construction, buildings can become more energy-efficient, reducing the carbon footprint and saving money on energy costs.

References:
Energy Efficiency of AAC
The Physical and Mechanical Properties of Autoclaved Aerated Concrete (AAC) with Recycled AAC as a Partial Replacement for Sand