Description
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
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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.
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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.
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Quiet and dependable operation: Advanced burner and heat-recovery design provide smooth, reliable heat with reduced operational noise and thermal stress.
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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
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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
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Annual professional service: Have a licensed HVAC technician inspect and tune components before the heating season — burner, heat exchanger, combustion air system, and controls.
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Check condensate drainage: Ensure condensate lines are clear and properly pitched to avoid clogs or freezing.
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Monitor system pressure: Keep boiler pressure within manufacturer-recommended range; adjust with an expansion tank if needed.
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Clean air intake & exhaust terminations: Keep vents and air intake areas free of debris and obstructions for safe combustion.
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Inspect for leaks: Periodically check around valves, joints, and fittings for water or gas leaks.
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Maintain water quality: Use corrosion inhibitors and flush the hydronic system periodically to reduce scale and prolong equipment life
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