The Rheem AS41660 Air Box - Lower ULN 14 in. is designed to enhance airflow in your water heater system. Constructed from durable materials, this air box ensures optimal performance and compliance with industry standards. Its precise dimensions allow for easy installation and compatibility with various Rheem models. This component plays a vital role in maintaining efficient combustion and heat exchange, making it essential for both residential and commercial applications. Upgrade your water heater's airflow with this reliable air box.