The heat losses through the walls of the combustion system are determined by the diameter of the pipe and the thickness of the insulation. An optimum insulation thickness which relates energy consumption with economics should be found in every particular case.
Efficient thermal insulation to keep heat losses through the walls at a minimum is normally achieved at the commissioning stage of the installation. However, insulating material may progressively deteriorate, and must be replaced after inspection following maintenance programmes. Some techniques using infrared imaging are convenient to identify the zones of damaged insulation from outside while the combustion installation is in operation in order to plan repairs during shutdown.
經由燃燒系統壁面的熱損失由管子的直徑及絕熱材料的厚度而定。在不同的案例中，可看到考量能源耗用的經濟性所做最適化絕熱材料的厚度。
燃燒系統壁面熱絕緣的有效性：在運轉初期熱損失通常是最小的，但日久絕熱材料會漸漸劣化，所以必須依照定期維護計畫檢查更換劣化部分。在燃燒設施運轉時，可利用紅外線造影技術由外部找到絕緣損壞部分，而後於停機時維修。
