As with all heated equipment, heat losses can be reduced by insulating the drying system, such as ovens and steam pipes and condensate pipes (see also Section 3.2.11). The type of insulation used and the thickness required depends on the operating temperature of the system, the materials being dried and if liquids other than water are being removed, or if the water vapour may be contaminated (e.g. with acid vapour).
The insulation needs to be maintained, as it can suffer deterioration with time due to embrittlement, mechanical damage, action of damp (e.g. from condensing water vapour, steam leaks) or contact with chemicals. Damaged insulation can be identified by visual inspection or by infrared scanning, see Section 2.10.1.
加熱設備可將烘乾系統中組件，如加熱爐、蒸汽管線、冷凝水管線等使用絕熱工藝以減少熱損失。絕熱設施的材料、型式與厚度應依系統的操作溫度、被烘乾的原物料、被分離的液體、可能汙染蒸氣(如酸性氣體)而決定。
絕熱設施會因為使用日久、外力損傷、化學性侵蝕、潮溼(凝結水、蒸汽洩漏) 而降低絕熱效果，故需要經常性的維護保養。
