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Insulation of Cooling Systems

Insulation thickness of cooling systems

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To avoid heat gain and reduced efficiency of cooling systems, condensation of water on surfaces, and potential corrosion problems, pipes in cooling systems should always be insulated.

As a rule of thumb the insulation thickness of chilled water, refrigerant and brine systems should be no less than indicated below:

System Operation Temperature Pipe Size (inches)
< 1" 1 1/4" - 2" 2 1/2" - 4" 5" - 6" > 8"
(oF) (oC) Insulation Thickness (inches)
Chilled Water 40 - 55 4 - 12 0.5 0.75 1.0 1.0 1.0
Refrigerant < 40 < 4 1.0 1.5 1.5 1.5 1.5
Brine < 40 < 4 1.0 1.5 1.5 1.5 1.5

The insulation of a cooling system should be made of micro-cellular cross-linked polyethylene foam with low water vapor diffusion.

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