EcoTec 199-H 199 Input MBtu 95% AFUE Gas Combi Condensing Heat Only Water Boiler Series 2

Weil-McLain ECO® Tec 199 Heat-Only Condensing Boiler – Model 383900175

The Weil-McLain ECO® Tec 199 Heat-Only Boiler is a high-efficiency, wall-mounted, condensing gas boiler designed for residential hydronic systems. With a 199,000 BTU/hr input capacity and a 95% AFUE rating, this model is suitable for larger heating loads requiring compact equipment with field-serviceable components. It is compatible with natural gas or propane (field conversion required) and features a stainless steel firetube heat exchanger for corrosion resistance and thermal efficiency.

Engineering & Performance Features

• Heat Exchanger: 316L stainless steel firetube design with water-tube geometry for optimized heat transfer and durability under condensing conditions.
• Combustion System: Fully modulating with a 10:1 turndown ratio; adapts burner output to match real-time system demand, reducing cycling and maximizing efficiency.
• AFUE: 95% (condensing operation), ENERGY STAR® certified.
• Ignition: Direct spark ignition with integrated flame monitoring and diagnostics.
• Emissions: Low NOx (<20 ppm), compliant with regional clean-air regulations including SCAQMD Rule 1146.2.
• Control System: Capacitive touchscreen display with built-in diagnostics, outdoor reset capability, pump control, and full system monitoring.

Technical Specifications

• Model: ECO® Tec 199 Heat-Only (383900175)
• Input Capacity: 199,000 BTU/hr
• DOE Heating Capacity: 184,000 BTU/hr
• Net I=B=R Rating: 160,000 BTU/hr
• Fuel: Natural Gas or LP (field convertible)
• Ignition: Electronic, direct spark
• Vent Type: Direct vent, 2" or 3" PVC/CPVC/Polypropylene (up to 100 ft equivalent length)
• Relief Valve: 30 PSIG ASME pressure relief valve (factory installed)
• Installation Type: Wall-hung

Installation Guidelines

Installation of the ECO® Tec 199 is intended for licensed HVAC or plumbing professionals. The boiler includes mounting bracket hardware, factory-installed circulator, condensate trap, pressure relief valve, and air vent. Venting materials and combustion air intake must be installed per Weil-McLain’s approved guidelines to maintain efficiency and ensure safety.

The onboard control system supports integration with zone valves or pumps, outdoor reset sensors, DHW indirect tanks (with priority), and auxiliary relays. System flushing, pressure testing, and combustion calibration are required at startup.

Integrated Control Capabilities

• Outdoor Reset: Included, with modulating response to ambient temperature shifts.
• Circulator Control: Boiler and system pump logic via integrated relay board.
• Diagnostics: Real-time fault monitoring, history log, and setup wizard through capacitive touchscreen display.

Certifications & Compliance

• ENERGY STAR® listed
• ANSI Z21.13 / CSA 4.9 certified
• ASME Section IV-stamped heat exchanger
• Meets low NOx requirements nationwide

Summary

The Weil-McLain ECO® Tec 199 Heat-Only Boiler (Model 383900175) delivers reliable, high-efficiency performance for modern residential hydronic systems. Its compact, wall-hung design, stainless steel firetube construction, and advanced control interface make it a solid choice for professional installations requiring precision modulation, space savings, and long-term serviceability.