This topic has been studied using constant interior and exterior finishing materials (Thermostone, 200 mm thick (A), fired clay bricks, 240 mm thick (B), hollow concrete blocks, 200 mm thick (C), solid concrete blocks, 140 mm thick (D), and limestone, 200 mm thick (E)) due to the availability of many different types of building materials in Iraq and the lack of control over the use of the best. to demonstrate how each of these materials affects a building’s insulation to deliver the appropriate levels of comfort and achieve the greatest possible reduction in the electrical energy needed for air conditioning. A unique chamber was created for performing the actual trials on such walls in their natural environment, which was the climate of the city of Baghdad (zip code 10016,33 ºN latitude, 44 ° E longitude). And a unique room was created for performing real-world tests on those walls, either in their current state of operation or with the addition of thermal insulation (60 mm thick microfiber glass insulation materials). The values for electricity consumption are 199,138,121,101,92 kW/m2 without the insulator, but when the insulator is used, the values become 54,92,63,100,58 kw/m2 for the models Case-C1, Case-E1, Case-B1, Case-D1, and Case-A1. respectively, the percentage of the reduction in electrical energy consumed by the room’s air conditioner ranges from 25–60%, depending on the model compared to the conventional model, and the difference in savings is only 35%. The amount of savings in the electrical energy consumed by the air-conditioning unit used (to provide standard thermal conditions inside the building) will decrease when the insulator is incorporated into the structural components because the savings difference will be equal to 15% only when changing the quality of the wall used (described in the study) compared to the traditional method.