AO Smith is one of the industries best manufacturers of Traditional Tank Type Water Heaters. Did you know that they offer different 2 different qualities of water heaters? The AO Smith ProLine is built with "Commercial Grade Components" while your Signature is built with standard components.  Below is a list of points to consider when replacing your water heater.

Availability and Purchase Channels:

• AO Smith Signature: Exclusively available at Lowe's and through the AO Smith shop on Amazon. These models are designed for direct consumer purchase and do not require professional installation for warranty validity.
  
• AO Smith ProLine: Available only through professional installers or contractors, not directly sold to consumers in retail stores. They are often marketed through plumbing supply houses.

Quality and Components:

• AO Smith Signature: These units are typically seen as more budget-friendly options with basic features. They might use more standard components compared to ProLine. Some users and professionals suggest that the quality might be slightly lower than ProLine, especially in terms of materials like drain valves, which could be plastic instead of brass.
• AO Smith ProLine: Known for higher quality components and construction. ProLine models often feature commercial-grade parts like brass drain valves, thicker insulation, and upgraded elements. They are designed with durability in mind, using better anode rods and possibly different tank linings.

Warranty and Support:

• AO Smith Signature: Generally comes with a standard 6-year warranty for tanks, with limited labor warranty coverage (1 year). The warranty process might involve dealing with the retailer where it was purchased, like Lowe's.
• AO Smith ProLine: Offers extended warranty coverage, such as 8-year warranties on some models, and the warranty support is often directly through AO Smith or local supply houses, which might facilitate quicker service or part replacements. The lack of labor warranty is typical for commercial products, but the parts warranty is generally seen as more robust.

Efficiency and Performance:

• AO Smith Signature: While efficient, these models do not typically match the highest efficiency ratings of the ProLine series. They offer good value for money but might not have the latest energy-saving technologies or as high recovery rates.
• AO Smith ProLine: Includes models with higher energy efficiency ratings, possibly ENERGY STAR certifications, and options for high-efficiency technologies like heat pump or tankless systems. They are engineered for better performance in terms of hot water delivery and energy efficiency.

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