If you want to buy your bat box, anything with the Merlin Tuttle certification is a well made, effective bat box. BCI is also an accredited organization, and any boxes certified by them should also be effective. Make sure to read more about the bats in your area before purchasing a house. Here are a couple recommendations below:
- This link has a list of box vendors at the bottom of the page: https://www.merlintuttle.org/selecting-a-quality-bat-house/
- BCI accredited: https://www.bigbatbox.com/