Allow proper ventilation around the equipment.
Clean filters regularly.
Defrost freezers regularly.
Maintain an updated inventory of stored samples available to all users.
Dispose of unwanted samples regularly.
Choose tube size according to sample size and rack size according to tube size.
Storage at 4 and -20 °C: How to save energy?
Storage at these temperatures is far less energy-costly than at -80 or -70 °C. Still, you may save energy by following many of the same principles as for ULT freezers.
Energy & Water