In HVAC systems, the most crucial performance parameter when selecting insulation materials is thermal performance. Rubber and plastics, due to their stable thermal conductivity and thermal stability, are widely used in refrigeration, heating, and ventilation pipelines.

The thermal conductivity of rubber and plastics typically ranges from 0.030 to 0.034 W/(m·K). Their advantage lies in the minimal change in thermal conductivity regardless of long-term use or temperature fluctuations. This stability makes them ideal for central air conditioning systems with long operating cycles.

The surface temperature control capability of rubber and plastics is also reflected in their heat capacity. Rubber and plastic materials are lightweight, have low specific heat, and heat up slowly, reducing heat loss caused by alternating hot and cold temperatures. Therefore, rubber and plastics are frequently used in indoor energy-saving renovation projects in energy-saving and environmental protection standards.

Another key thermal parameter is water vapor permeability. Since chilled water systems are highly susceptible to condensation, rubber and plastics generally have a water vapor permeability resistance value of ≥3000, significantly reducing the risk of moisture intrusion. This makes the application of rubber and plastics in chiller room, basement, fan coil units, and chilled water pipelines highly reliable.

Rubber and plastic also possess excellent surface heat reflectivity. The specially treated rubber and plastic outer skin further reduces heat exchange, resulting in higher insulation efficiency.

In terms of temperature range, rubber and plastic are suitable for temperatures from -40℃ to 105℃, with some models reaching 120℃, meeting the needs of most HVAC systems for transporting hot and cold media.

In summary, analyzing the various parameters of rubber and plastic based on their thermal performance reveals the reasons for their widespread application in the HVAC industry. Their low thermal conductivity, low heat capacity, and excellent condensation resistance make them an irreplaceable lightweight insulation material for heating and cooling systems.

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