Esteem 399
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TECHNICAL DATA SHEET Low NOx Esteem 399 Gas Fired Hot Water Boiler The AERCO Esteem 399 is a wall-hung boiler with a uniquely designed stainless-steel heat exchanger with 95% efficiency. It offers all the benefits of the new generation high efficiency, modulating, condensing boilers along with easy installation, low maintenance and high reliability. At the heart of the AERCO Esteem 399 is a 439 stainless steel fire tube heat exchanger. This highly corrosion resistant heat exchanger is perfect for all condensing Hydronic heating designs. The design of the heat exchanger tube creates flue gas and water turbulence which maximizes thermal efficiency. The AERCO Esteem has a premix air/fuel blower and a high grade stainless steel burner that is capable of modulating the firing rate from 28% to 100% allowing the boiler to closely match your heating needs without short cycling or reducing efficiency. The burner features a long life, quiet operation, reliable spark ignition, and clean combustion for low NOx applications. The AERCO Esteem 399 also offers a smart and convenient 4-digit user interface module displays system stats and fully adjustable parameter values as well as diagnostic codes for easy troubleshooting and optimum system performance. This superior design provides you with a heat source that you can install with confidence that will run at peak efficiency for many years with minimal maintenance. PERFORMANCE SPECIFICATIONS Model Number EST 399 Fuel Natural Gas or Propane Input Modulation *Based on the BTS 2000 test standards as verified by AHRI Condensing Boiler 3.6:1 Turndown 439 Stainless Steel Heat Exchanger Whisper Quite Operation <50dBa Outdoor Temperature Superior Reliability Direct or Conventional Vent with Polypropylene, PVC, CPVC or AL29-4C Materials • Minimal Space Requirements Compact Size, Wall Hanging • Trimax Controller • Graphical Display • On board Sequencing • Simple Setup Menu • Intelligent Trouble Shooting Condensing Firetube Designs

CONNECTIONS/DIMENSIONS/DATA Model Number EST 399 Supply/Return Gas Connections Connections 1 1/2” 1” SPECIFICATIONS: Model # Heating BTU/h AFUE Type of Gas Gas Connections (NPT) Max. Gas Pressure Min. Gas Pressure Max. Allowed Working Pressure Electrical Req. Water Connections (NPT) Min. Water Flow at Max. Firing Rate (GPM) Min. Water Flow at Min. Firing Rate (GPM) Max. Water Flow (GPM) Water Pressure Drop @ Max. Flow (PSI) Water Volume: Gallons Water Volume: Liters Turndown or Operating Range Vent Size Vent Materials (as per local code) Temperature Control Range Maximum Noise Level NOx...