Due to the soaring energy prices, the cost to maintain a basic living standard has increased, therefore choosing right insulated materials when building a new house/appliance is important. The heat transfer coefficient plays a vital role; therefore, developing an effective, accurate, and low cost testing machine is an important issue. This is also the goal of this research. The testing apparatus developed can be used to measure the thermal conductivity as a basis for the choice of the materials. The heat conduction testing equipment was designed using “the thermal conductivity comparison with a known conductivity” method in addition to the basic heat conduction theory. For the best results, several parameters were used to fine-tune the operating conductions, such as cooling flow rate, heat source temperature, etc. Three types of materials were used as the sample for verifying the accuracy of the developed apparatus: gypsum board, silicon cement and PE polyethylene foam. Four heat sources temperatures were tested: 30°C, 35°C, 40°C, and 45°C. Two cooling flow rates were used: 108 liter/hour and 90 liter/hour. In the end, ANSYS was used to validate the testing results. The testing results show that the measured thermal conductivity is accurate. Equilibrium can be reached faster when testing with high cooling flow rates. The best hot plate temperature is 30°C.

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