One of my customers wants me to install a 5kW ducted system in a chippy. Due to the grease he wants to supply 100% fresh air into the indoor unit. No recirc at all.

Sounds possible in theory as ambient air will be at a lower temp (and cleaner) than air in the chippy.

Has anyone done this before. The drawbacks I can forsee are freezing up due to running constantly and extra strain on plant. Thoughts?