An automated grid based storage and retrieval system , comprising: - a framework structure comprising upright members and a grid of horizontal rails provided at upper ends of the upright members , the framework structure defining a plurality of storage volumes arranged adjacent one another below the horizontal rails , the storage volumes are open against the horizontal rails such that storage container vehicles may lower and raise storage containers into and out of the storage volumes , - a plurality of vertical walls surrounding each of the plurality of storage volumes , - a cooler system adapted to draw air from an input of the cooler system , cool the air drawn from the input , and blow cooled air through an output of the cooler system , - for each of the plurality of storage volumes , the system further comprises a first air damper connected between the output of the cooler system and an air release area above the storage volume , and a second air damper connected between a void beneath the storage volumes and the input of the cooler system , - a controller , the controller adapted, independently for each of the plurality of storage volumes , to adjust airflow through the first air damper associated with that storage volume to control an overpressure and air temperature in the air release area , and to adjust airflow through the second air damper associated with that storage volume to control an underpressure in the void , such that a storage volume temperature is controlled separately for each of the plurality of storage volumes , the storage volume temperature being regulated by the air temperature in the air release area and by controlling a pressure differential between the overpressure in the air release area and the underpressure in the void in each of the storage volumes . - a framework structure comprising upright members and a grid of horizontal rails provided at upper ends of the upright members , the framework structure defining a plurality of storage volumes arranged adjacent one another below the horizontal rails , the storage volumes are open against the horizontal rails such that storage container vehicles may lower and raise storage containers into and out of the storage volumes , - a plurality of vertical walls surrounding each of the plurality of storage volumes , - a cooler system adapted to draw air from an input of the cooler system , cool the air drawn from the input , and blow cooled air through an output of the cooler system , - for each of the plurality of storage volumes , the system further comprises a first air damper connected between the output of the cooler system and an air release area above the storage volume , and a second air damper connected between a void beneath the storage volumes and the input of the cooler system , - a controller , the controller adapted, independently for each of the plurality of storage volumes , to adjust airflow through the first air damper associated with that storage volume to control an overpressure and air temperature in the air release area , and to adjust airflow through the second air damper associated with that storage volume to control an underpressure in the void , such that a storage volume temperature is controlled separately for each of the plurality of storage volumes , the storage volume temperature being regulated by the air temperature in the air release area and by controlling a pressure differential between the overpressure in the air release area and the underpressure in the void in each of the storage volumes . <EOS>