Weil-McLain CGi Series 5 Boiler 381359364 Gas-Fired Cast Iron 84% AFUE

The Weil-McLain CGi™ Series 5 (Model 381-359-364) is a premium cast-iron, gas-fired hot-water boiler engineered for long-lasting comfort and efficiency. Designed for both residential and light commercial installations, this unit offers induced-draft performance, an 84% AFUE efficiency rating, and a durable cast-iron heat exchanger that ensures reliable operation for decades. This CGi model includes Unity-CI text-based controls, a built-in low water cutoff, and a fully insulated jacket for improved thermal performance. With flexible venting, quiet operation, and proven reliability from Weil-McLain — North America’s most trusted boiler manufacturer — this system is an excellent choice for hydronic heating systems. 🔥 Key Features 84% AFUE Efficiency for dependable heating performance. Unity-CI electronic control with digital text display for simple setup & diagnostics. Induced-draft design — improves venting reliability and system stability. Integrated low-water cutoff system