Below is a link to the Avanti website. See if they provide specifications (BTU output) for the model you''re looking for. There are several good articles on the SailNet site providing BTU loss data for refrigeration size/insulation. In the tropics there''s going to be a lot more heat to remove, so bear that in mind when looking for any refrigeration system. My other concern would be the latching mechanism on what appears to be a residential use system. You may have to have an alternative way to secure the door if you decide on this system. Also, consider how the refrigerator would be secured in that space; certainly not a big problem, just something to think about.