Kool Wrap has products that fall into both categories. If you are a plumber and you are running hot water pipes, you often wrap the copper hot water pipes in some sort of lagging or fibreglass wrap to prevent the hot water cooling down before it gets to the taps. This is actually saving energy.
Our Kool Wrap range of exhaust wraps and tapes do the same task and have often been used in the heating and cooling industry.
Our heat sleeves and aluminium sheeting do the opposite. They reflect radiant heat and the inner fibreglass matting insulates the hose or cable being protected.