Weil-McLain Ultra Series 4 299,000 BTU Condensing Gas Boiler

Weil-McLain Ultra Series 4 299,000 BTU Condensing Gas Boiler

Weil-McLain is a leading North American Brand of hydronic comfort heating systems for residential, commercial and institutional buildings, since 1881. Contractors, engineers, architects, homeowners, and facility managers alike rely on Weil-McLain boilers for their comfort heating needs. Installed in homes, offices, schools, restaurants, hotels, and other facilities throughout North America, the Weil-McLain brand is among the most trusted and often used in the building industry.

Features

• Cast aluminum coated heat exchanger
• Designed to operate in low temperature condensing applications
• Outdoor reset and domestic hot water priority
• Modulates with 5:1 turn-down ratio
• High grade stainless steel burner features quiet operation
• U-Control gives the power for easy set-up and maintenance
• Multiple set-up and zone options
• System sensing recognizes system and outdoor temperatures
• Temperature management for up to three different set-points
• Control multiple boilers from a single control panel
• Standard screen messages provide service alerts and maintenance reminders

What Our Experts Think

• Top-tier high efficiency: The Weil-McLain Ultra Series 4 299,000 BTU Condensing Gas Boiler delivers industry-leading condensing performance (typically up to ~95% AFUE), maximizing heat output while minimizing fuel costs.

• High-capacity heat: With 299,000 BTU/h output, this boiler is ideal for large homes, multi-unit buildings, and light commercial facilities with substantial heating loads.

• Quiet and dependable operation: Advanced burner and heat-recovery design provide smooth, reliable heat with reduced operational noise and thermal stress.

• Durable, service-oriented design: Weil-McLain’s robust engineering emphasizes corrosion resistance, long-lasting components, and accessible service points — reducing downtime and maintenance costs.

Product Q&A

• What type of boiler is this?
  A high-efficiency condensing gas boiler that uses a second heat exchanger to extract extra heat from exhaust gases before venting.

• Where is this best used?
  Excellent for large residential properties, multifamily housing, schools, churches, and light commercial sites requiring significant hydronic heating capacity.

• What heating systems does it support?
  Works with hydronic baseboard, radiant floor, fan coils, and other hot-water heat distribution systems.

• What fuel does it use?
  Natural gas (propane conversion kits may be available through a qualified HVAC technician if needed).

• Does it require special venting?
  Yes — condensing boilers typically use PVC/CPVC or polypropylene venting due to lower exhaust temperatures and to manage condensate safely.

Maintenance Tips

• Annual professional service: Have a licensed HVAC technician inspect and tune components before the heating season — burner, heat exchanger, combustion air system, and controls.

• Check condensate drainage: Ensure condensate lines are clear and properly pitched to avoid clogs or freezing.

• Monitor system pressure: Keep boiler pressure within manufacturer-recommended range; adjust with an expansion tank if needed.

• Clean air intake & exhaust terminations: Keep vents and air intake areas free of debris and obstructions for safe combustion.

• Inspect for leaks: Periodically check around valves, joints, and fittings for water or gas leaks.

• Maintain water quality: Use corrosion inhibitors and flush the hydronic system periodically to reduce scale and prolong equipment life