Security footage showed two people jumping the barbed wire-topped fence to the yard and running straight to the chiller unit which was parked behind two trucks and a pile of pallets.
"They pushed it around a bit to get it out."
One left, got in a car nearby and returned.
The thieves hitched it to a tow bar and were quickly gone.
The footage showed the car had no registration plates.
"So they've planned this."
The car appears to be Japanese and silver in colour with black wheel hubs.
The chiller-freezer unit was clearly marked with Star Foods on the sides.
Napier Police are seeking information about the car and any sighting of the unit.
"It was custom built for us - there is not another one like it," Mr Bryant said.
- Anyone who may have seen the unit being towed, used or stored is asked to contact Napier Police on 8310700.