
100187881 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $149.00 | Condition is New, F. A.O. Smith Part# 100187881 - Spark Ignitor Assembly, FREE SHIPPING | 100.0% |
![]() | $159.99 | Condition is New, READ! A.O. Smith Lochnivar 100187881 9008927015 K Spark Igniter Assy Ships FREE, FREE SHIPPING | ![]() |
![]() | $177.75 | Condition is New, 100187881 A.O. SMITH K SPARK IGNITER ASSEMBLY, shipping cost = $11.95 | 99.9% |
![]() | $232.99 | Condition is New, Lochinvar & A.O. Smith 100187881 Spark Ignitor Assembly, FREE SHIPPING | 99.7% |
![]() | $245.65 | Top Pick! Condition is New, Lochinvar & A.O. Smith 100187881 - Spark Ignitor Assembly for Reliable Ignition, FREE SHIPPING | ![]() |

The Smith 100187881 Lochinvar AO Spark Igniter Water Heater is a high-performance, efficient solution for your residential or light commercial hot water needs. This unit is part of Lochinvar's renowned Knight Series, known for their superior quality and reliability.
This water heater features a powerful, reliable spark igniter system that ensures a consistent ignition of the burner. The igniter system is designed to operate with a low voltage electrical supply, making it an ideal choice for areas with no access to a dedicated 120V power source.
The Smith 100187881 water heater is designed with a high-input, condensing, stainless steel tank that provides an impressive 95% thermal efficiency. This high efficiency rating not only saves energy but also reduces your overall energy costs. The tank is also insulated with a high-density, closed-cell foam insulation to minimize heat loss and maintain consistent water temperature.
This unit is available in various capacities ranging from 30 to 119 gallons, making it a versatile option for different hot water demands. The size of the tank can be customized to suit your specific requirements.
The Smith 100187881 Lochinvar AO Spark Igniter Water Heater comes with a number of advanced features that ensure optimal performance and reliability. These features include a user-friendly, digital control system that allows for easy temperature adjustments, a built-in recirculation system that eliminates the need for a separate recirculation pump, and a diagnostics display that provides real-time system information.
The unit is also equipped with a stainless steel burner and heat exchanger, which provides long-lasting durability and resistance to corrosion. Additionally, the unit has a low NOx burner design, which meets the strictest emissions standards, making it an eco-friendly option for your home or business.
The Smith 100187881 Lochinvar AO Spark Igniter Water Heater is designed with a compact footprint, making it easy to install in tight spaces. It also comes with a factory-installed draft diverter, which ensures proper combustion air intake and eliminates the need for a separate draft diverter.
In summary, the Smith 100187881 Lochinvar AO Spark Igniter Water Heater is a high-performance, efficient, and reliable solution for your hot water needs. Its advanced features, customizable tank sizes, and eco-friendly design make it a top choice for homeowners and business owners alike.
Pros and Cons of Buying a Lochinvar A.O. Spark Igniter Water Heater (Model No. SMITH 100187881)
Introduction:The Lochinvar A.O. Spark Igniter Water Heater (Model No. SMITH 100187881) is a high-efficiency, condensing, residential water heating solution from Lochinvar, a reputable manufacturer in the HVAC industry. This model uses a spark igniter to ignite the gas, making it an attractive option for those seeking a reliable and efficient water heating system. In this analysis, we will outline the primary advantages and disadvantages of investing in this water heater.
Pros:1. High Energy Efficiency: With an AFUE rating of up to 95%, the Lochinvar A.O. Spark Igniter Water Heater is a highly energy-efficient option. This means that more heat is produced from the fuel, resulting in lower energy bills and a smaller carbon footprint.
2. Compact Design: This water heater's compact design allows it to be installed in various locations, including garages, utility rooms, and closets, making it a versatile choice for homeowners with limited space.
3. Durable Construction: Lochinvar is known for building robust and long-lasting water heating products. The SMITH 100187881 model incorporates a heavy-duty, stainless steel heat exchanger, ensuring resistance to corrosion and extending the unit's lifespan.
4. Easy Installation: The water heater's direct venting system and optional power venting kit enable it to be installed in various venting configurations, simplifying the installation process for professionals.
5. Energy Star Certified: The Lochinvar A.O. Spark Igniter Water Heater is Energy Star certified, indicating that it meets or exceeds the energy efficiency guidelines set by the U.S. Environmental Protection Agency and the U.S. Department of Energy.
Cons:1. Higher Upfront Cost: The Lochinvar A.O. Spark Igniter Water Heater has a higher upfront cost compared to conventional, non-condensing water heaters. However, the energy savings and efficiency gains can offset the initial investment over time.
2. Complexity: Due to its advanced features, the installation and maintenance of this water heater may require the expertise of a professional HVAC technician.
3. Potential Noise: Condensing water heaters can produce more noise due to the condensation process. While the Lochinvar model has sound-attenuating features, some homeowners may still find it louder than traditional water heaters.
Conclusion:When considering the Lochinvar A.O. Spark Igniter Water Heater (Model No. SMITH 100187881), homeowners should weigh the benefits of high energy efficiency, compact design, durability, and Energy Star certification against the potential downsides of a higher upfront cost, complexity, and potential noise. Ultimately, if energy savings, a compact footprint, and a reliable, long-lasting water heating solution are priorities, this Lochinvar model is worth the investment.
Recommendation:If you are in the market for a high-efficiency, condensing water heater and are willing to pay a slightly higher upfront cost for the long-term benefits, the Lochinvar A.O. Spark Igniter Water Heater (Model No. SMITH 100187881) is an excellent choice. Its energy efficiency, compact design, durability, and Energy Star certification make it a wise investment for homeowners seeking a reliable and efficient water heating solution.
Details:
specifications maxohvac:
- brand: A. O. Smith
- mpn: 100187881
- type: Spark Igniter Assembly
- country of origin: United States
- upc: 020363184421
seller maxohvac:
- city: wagoner, oklahoma
- rating: 99.9%
- # reviews: 8487
returns maxohvac:
- policy: no returns
general maxohvac:
- category: Business & Industrial > Hvac Refrigeration
offer maxohvac:
- started: february 22, 2026
- best offers: true
- options: ship-to-home
- prices: $149.00–$245.65
- item condition: New
- availability: in stock
- in stock #: 5
- sold #: 11
shipping maxohvac:
- transit: 4-8 days
- type: fixed
- service: standard
- class: standard
payments maxohvac:
- credit card: diners-club
- wallet: paypal
- other
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