Cooling below ambient

There was a really good post on using a TEC in another feed from @rick_1976 that I would suggest reading.

I do not think there is a one-part complete solution in this case. There would also need to be information on the device you are using and the ability to add a Peltier. You also need to consider factors like the power needed to operate the Peltier, the room for an appropriately sized heat sink to remove the needed heat from the Peltier and the appropriate airflow needed for the heat sink. As mentioned in the article above a thermal model could help to identify some of these answers.