The Carrier EF33CW180 is a natural gas valve designed to precisely control the flow of gas in various HVAC equipment, including furnaces and boilers. It features a compact design (4.7 x 4.8 x 2.2") and operates on a 24-volt electrical system. This electronic control ensures accurate gas regulation, leading to improved system efficiency and performance. https://www.partshnc.com/24v-35wc-nat-34-gas-valve-3