AO Smith water heaters are known for their energy efficiency and advanced technology, while Rheem water heaters offer a variety of models with reliable performance and innovative features; choosing between them depends on specific needs such as capacity, fuel type, and warranty options.
Choosing between AO Smith and Rheem water heaters can be tough. Both brands lead the market with reliable, efficient models. This guide compares their warranties, reliability, efficiency, and features to help you decide.
Brand Overview
Rheem Water Heaters
Rheem has been in the water heating industry since 1925. They offer a wide range of tank and tankless models. Rheem focuses on energy efficiency and smart technology. Many models feature Wi-Fi connectivity and self-cleaning systems.
AO Smith Water Heaters
AO Smith started in 1874 and is known for durable construction. They provide both traditional and tankless options. AO Smith emphasizes consistent performance and straightforward designs. Some models include basic smart features.
Energy Efficiency Comparison
Energy efficiency is measured by the Uniform Energy Factor (UEF). Higher numbers mean better efficiency.
| Model | Brand | UEF Rating |
|---|---|---|
| Performance Platinum 50-gal | Rheem | 0.82 |
| Signature Premier 50-gal | AO Smith | 0.70 |
Rheem models typically have higher UEF ratings. This means lower energy bills over time. Their heat pump water heaters are especially efficient.
Warranty Coverage
Rheem Warranties
Rheem offers:
- 6-12 year standard warranties
- Up to 16 years with ProtectionPlus kits
- Lifetime warranty on Marathon series
AO Smith Warranties
AO Smith provides:
- 3-12 year limited warranties
- 1 year labor coverage
- Strict maintenance requirements
Rheem generally offers longer coverage periods. However, AO Smith warranties are still competitive for standard models.
Reliability and Lifespan
Both brands are reliable, but there are differences:
- Rheem: 12-15 year average lifespan
- AO Smith: 10-12 year average lifespan
Rheem’s aluminum anode rods help prevent corrosion. This extends tank life. AO Smith units may need more frequent anode rod replacements.
Installation and Maintenance
Installation
Rheem models often have simpler installation. Features like flexible venting help. AO Smith units may need more adjustments.
Maintenance
Both brands require:
- Annual tank flushing
- Anode rod inspections
- Temperature setting checks
Rheem’s self-cleaning models reduce sediment buildup. This means less maintenance over time.
Technology and Features
Rheem Features
- EverKleen self-cleaning
- EcoNet smart technology
- High recovery rates
AO Smith Features
- Durable glass-lined tanks
- Basic Wi-Fi on select models
- Simple controls
Rheem leads in smart features. AO Smith focuses on core performance. Consider your tech preferences when choosing.
Price Comparison
Prices vary by model and capacity:
- Rheem: $600-$1,800
- AO Smith: $500-$1,600
AO Smith models are often slightly cheaper upfront. However, Rheem’s efficiency may save more long-term. Check depreciation life when calculating costs.
Which Brand Should You Choose?
Choose Rheem if you want:
- Higher energy efficiency
- Longer warranties
- Smart home integration
Choose AO Smith if you prefer:
- Lower upfront cost
- Simple, durable design
- Basic functionality
Both brands make quality water heaters. Your decision should depend on specific needs and budget. For tankless options, see our tankless water heater guide.
