Pikes Peak Market BCI Certified Triple-Chamber Bat House - Brown Certified By Bat Conservation International - 27.25" x 16" x 7" Side vents for increased air circulation in climate Zone 2 (see map) Western red cedar tongue-in-groove construction; sealed, primed and painted Bat-friendly grooved interior surfaces; two 2" access holes in each partition Superior design and construction ensure a 20-30 year life expectancy