Our large single-chambered bat house weighs 14 lbs. and measures 27" high x 25" wide x 2.5" deep. At peak season, approximately 35 bats* can roost comfortably in this house. Install single-chambered houses on wood or masonry homes, barns, or other structures to help buffer temperature fluctuations. Visit our Bat House FAQs page to learn more about bat houses, including how to build your own. Contact us if you want to pick up your bat house and we'll waive the shipping.