Hi,
Best way I can answer this is to purchase the right equipment for the job. A domestic freezer is not designed to work like that, although it may get there in temp it won't hold it. Recovery is slower then the industrial unit you seek. Domestic unit warranties are void if used for commercial settings (i.e. lunch rooms, offices, lab's, etc...) I wish I had a better answer for you but if you need a specific temperature get the correct equipment for the job. Good Luck
I’m happy to help further over the phone at
https://www.6ya.com/expert/gere_bf68e6055dd61249
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