The following recommendations have been vetted by bat conservationist Merlin Tuttle and will maximize your chances for early BatBnB occupancy. The most important factor to consider is location. Do your best to stick to the following and you should hopefully see bats in the next few seasons!
1) Location: A location on a post or the side of a house, barn, or shed is best. In particularly cool climates, always opt for a building.
2) Sun: Even in hot climates your BatBnB should receive 6+ hours of direct sunlight daily, and in cooler climates, more sunlight is better.
3) Height:Place the BatBnB at least 10-12 feet off the ground making sure the bottom of your BatBnB has 10-12 feet clear. When possible, 15-20 feet is better. For the best chance of success, ensure there are no balcony or roofs blocking the area beneath.
4) Tree Placement: BatBnBs located at least 20 feet away from trees will be most successful. Bat houses mounted on trees are least successful because they often offer limited sun exposure and allow predators (mostly owls) to perch on nearby branches. If a tree is your only option, choose a sunny spot that is far from potential predator perches.