Can Findenser be stored at 0°C or lower? Findenser should not be exposed to temperatures around/below 0˚C. Findenser is composed of an internal glass condenser and an external finned aluminium jacket, between which a small amount of water is permanently sealed (for heat transfer). Since water freezes at 0°C, if it gets cold enough the water inside Findenser could freeze – expand and cause internal damage to the Findenser. To prevent any risk of damage, please do not leave Findenser inside a vehicle if it may be exposed to freezing temperatures.