A fan that runs all day wastes energy, because most of the time the cabinet is not hot enough to need it. The ventilation set bundles a fan with a KTS011 thermostat so the fan starts only when the cabinet reaches the set temperature, typically cutting ventilation energy by about a third.
The set ships as one SKU, so procurement and quoting stay simple. The fan mounts in a panel cut-out and the thermostat on a DIN rail, wired per the datasheet diagram. Set the thermostat switch-on at 30 to 35C for a standard cabinet, or 10K above the ambient design temperature. Operating range -20C to +60C.