GV90+5 113,000 BTU High Efficiency Gas Boiler (Natural Gas & Liquid Propane)

Weil-McLain GV90+ Gas Boiler – 140 MBH, High-Efficiency Cast Iron Condensing Unit

The Weil-McLain GV90+ Series is a high-efficiency, gas-fired, water boiler designed for hydronic heating applications. Model 382200612 delivers a 140 MBH input with an AFUE of 90.4%, making it suitable for residential installations where long-term performance and fuel savings are critical. This model incorporates a cast iron primary heat exchanger paired with a stainless steel secondary, combining the durability of traditional boiler construction with the thermal efficiency of modern condensing technology.

Engineered for Demanding Hydronic Systems

• Dual Heat Exchanger Design: Features a cast iron primary exchanger for thermal mass and reliability, and a condensing stainless steel secondary exchanger to capture latent heat and increase efficiency.
• 7-Pass Heat Transfer Path: Improves heat exchange and minimizes standby losses through advanced flue gas routing.
• Advanced Circulator Strategy: Integrated system protection via built-in dual circulators simplifies piping and supports outdoor reset control integration.
• Fuel Flexibility: Ships for natural gas with field-supplied LP conversion kit included.
• Condensate Management: Factory-installed condensate trap ensures safe removal and system longevity.

Technical Specifications

• Model: GV90+ (382200612)
• Input Capacity: 140,000 BTU/hr
• DOE Heating Capacity: 130,000 BTU/hr
• Net I=B=R Rating: 113,000 BTU/hr
• AFUE: 90.4%
• Primary Material: Cast Iron
• Secondary Heat Exchanger: Stainless Steel (409 Series)
• Vent Size: 3” PVC, CPVC, or polypropylene
• Venting Options: Direct Vent (2-pipe or concentric) or Direct Exhaust
• Boiler Dimensions: 37.75" L x 16" W x 36.625" H

Installation Considerations

The GV90+ requires direct venting and condensate drainage. The system must be piped in accordance with Weil-McLain’s installation manual and applicable mechanical codes. Its dual circulator configuration simplifies zone integration and is compatible with outdoor reset, priority domestic hot water, and low-temperature radiant circuits. Professional installation is recommended due to the boiler’s advanced controls, multi-pass exchanger design, and sealed combustion system.

Professional Notes

• Control Integration: Supports multiple zones, reset controls, and indirect water heater integration with dedicated relay ports.
• Pre-Piped Circulators: Reduces field labor and wiring time.
• Thermal Shock Protection: Eliminates the need for primary-secondary piping in most systems.
• Field Service Access: Hinged jacket and control board layout designed for rapid diagnostics and maintenance.

Summary

The Weil-McLain GV90+ Series combines cast iron durability with condensing performance, making it a strong candidate for new construction or retrofit projects where traditional boilers may fall short on efficiency. Model 382200612 delivers consistent, efficient heat output with a proven 7-pass exchanger design and broad venting flexibility. Ideal for high-efficiency residential hot water heating systems requiring long service life and low maintenance overhead.