The Rheem RTG20248 Recess Box Kit is designed for outdoor installation of mid-efficiency tankless water heaters. This kit provides a protective enclosure, ensuring the unit is shielded from environmental elements while maintaining optimal airflow. Constructed from robust materials, it meets industry standards for durability and safety. The compact design allows for easy installation, making it ideal for both new and existing setups. This recess box kit is essential for enhancing the longevity and performance of your Rheem water heater, ensuring it operates efficiently in outdoor conditions.