Abstract: A temperature maintenance storage unit includes a fan assembly, an evaporator coil assembly, a compressor unit, and an interior within which goods may be stored, with the fan assembly configured to selectively generate air currents over the evaporator coil assembly and within the interior. The temperature maintenance storage unit further includes an insulation pack assembly comprising a sealed generally flexible insulation pack containing a temperature control fluid, an insulation thermostat and an interior thermostat, with the insulation thermostat monitoring the temperature of the insulation pack assembly and the interior thermostat monitoring the temperature of the interior.