Take them where the work is in the factory or the job site. When you are done, there's no equipment to return. Ideal for adding insulation to spas after installation and for winterizing equipment. Water in an insulated pool remains warmer than non-insulated. Insulating may save, or reduce, the cost of a heater.
Insulated spas require less energy to heat water, retain heat longer.
Insulation protects valves, pipes, control enclosures from moisture, freezing. Insulation adds dimensional stability, internal support to spa vessels.