
521107520 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $650.00 | Condition is New, Weil-McLain 521107520 riello f-5 for weil mclain go 2-5, FREE SHIPPING | 97.7% |

The Riello 521107520 Weil-McLain F-5 Gas Fired Condensing Boiler is an excellent addition to any heating system looking for high-efficiency and reliable performance. This boiler is specifically designed for use with Weil-McLain's GO Series Modulating Condensing Boilers, providing a seamless integration into your existing heating system.
The F-5 Boiler boasts an impressive 95.5% AFUE rating, making it an energy-efficient choice for both residential and commercial applications. The condensing design allows the boiler to extract maximal heat from the fuel source, reducing energy waste and lowering your overall heating costs.
The F-5 Boiler features a robust, corrosion-resistant stainless steel heat exchanger, ensuring long-lasting durability in harsh environments. The unit also includes a built-in, fully modulating, low-NOx burner, allowing for precise temperature control and minimizing emissions.
The boiler's compact size makes it easy to install and integrate into most space constraints. Its front-access design allows for simple maintenance and servicing, minimizing downtime and maximizing system uptime.
Additionally, the F-5 Boiler includes several advanced features, such as a pre-mixed combustion system, which ensures consistent fuel-air mixture for optimal combustion efficiency, and a factory-installed electronic ignition system, which eliminates the need for a pilot light and reduces the risk of standing pilot fires.
The Riello 521107520 Weil-McLain F-5 Gas Fired Condensing Boiler is a reliable and efficient choice for those seeking to upgrade their heating system and reduce their energy consumption. With its high-efficiency design, robust construction, and advanced features, this boiler is an excellent investment for any heating application.
The Riello 521107520 and Weil-McLain F-5 are two high-efficiency gas boilers designed for use with Weil-McLain's GO2-5 and GO2-5S modulating/condensing boiler systems. Both boilers offer several advantages and disadvantages, making it essential to consider these factors before making a final decision.
Riello 521107520 Pros:1. High efficiency: The Riello 521107520 achieves an AFUE rating of up to 95%, making it an energy-efficient option for heating your home.
2. Modulating capacity: With its modulating capacity, this boiler can adapt to heating demands, providing more consistent and efficient temperature control.
3. Versatile fuel options: This boiler is compatible with both natural gas and propane, allowing for greater flexibility in fuel selection.
4. Turndown ratio: The Riello 521107520 offers a high turndown ratio, enabling the boiler to adjust to heating demands more effectively.
Riello 521107520 Cons:1. Limited warranty: The Riello 521107520 comes with a standard manufacturer's warranty of 5 years for parts and 10 years for the heat exchanger.
2. Complex installation: Installing this boiler may require specialized knowledge and expertise, potentially increasing the installation cost.
3. Limited availability: The Riello 521107520 may not be as widely available as other boiler models, which could make finding replacement parts more difficult.
Weil-McLain F-5 Pros:1. High efficiency: The Weil-McLain F-5 achieves an AFUE rating of up to 95%, making it an energy-efficient option for heating your home.
2. Modulating/condensing technology: This boiler uses modulating/condensing technology, enabling it to adapt to heating demands and provide more consistent temperature control.
3. Quiet operation: The Weil-McLain F-5 is designed for quiet operation, making it an excellent choice for homes where noise levels are a concern.
4. Durable construction: This boiler features a cast iron sectional heat exchanger, ensuring long-lasting performance.
Weil-McLain F-5 Cons:1. Limited fuel options: The Weil-McLain F-5 is designed for natural gas use only and is not compatible with propane.
2. Limited turndown ratio: Compared to the Riello 521107520, the Weil-McLain F-5 has a lower turndown ratio, which may result in less efficient temperature control in some situations.
Conclusion:Both the Riello 521107520 and Weil-McLain F-5 are high-efficiency gas boilers with modulating/condensing technology, making them suitable choices for homeowners looking to upgrade their heating systems. While both boilers offer similar efficiencies and temperature control capabilities, the Riello 521107520 stands out with its versatile fuel options and higher turndown ratio. On the other hand, the Weil-McLain F-5 boasts quiet operation and durable construction. Ultimately, the decision between these two boilers comes down to personal preferences, available fuel options, and installation considerations.
Recommendation:If fuel flexibility and a higher turndown ratio are important factors, the Riello 521107520 may be the better choice. However, if quiet operation and durability are priorities, the Weil-McLain F-5 is an excellent option. Homeowners should consult with a qualified heating professional to determine which boiler best suits their specific heating requirements and budget.
Details:
Collection: go. Depth: 15-5/12 in. UPC: 9.: burner.
Width : 10-11/16 in. Power source: oil. Application: residential. height : 9-1/6 in.
specifications maxohvac:
- brand: Riello
- mpn: 521107520
shipping maxohvac:
- type: calculated
- service: usps ground advantage
- carrier: usps
- class: standard
- transit: 5-12 days
seller maxohvac:
- city: ladys island, south carolina
- rating: 98.2%
- # reviews: 54
general maxohvac:
- category: Business & Industrial > Hvac Refrigeration
payments maxohvac:
- wallet: apple-pay
- other
- credit card: diners-club
offer maxohvac:
- in stock #: 1
- options: ship-to-home
- availability: in stock
- price: $650.00
- item condition: New
- sold #: 13
- started: december 14, 2025
returns maxohvac:
- policy: no returns
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