The 30-Second Verdict
Both Rheem and A.O. Smith are top-tier water heater brands with strong Florida track records. Rheem is widely available at big box stores; A.O. Smith is the preferred brand for many HVAC and plumbing professionals. The installer's expertise matters as much as the brand.
Head-to-Head Breakdown
Rheem
Pros
- Widely available at Home Depot and Lowe's throughout Florida
- Strong product lineup including ProTerra hybrid electric heat pump (best efficiency)
- Competitive pricing
- Long warranty options (6-12 year tank, 12 years on ProTerra)
- EcoNet smart monitoring available on some models
Cons
- Big box purchasing means installation quality varies widely
- Some lower-tier models aren't appropriate for Florida's demanding water conditions
- Customer service through dealers rather than direct
A.O. Smith
Pros
- Preferred brand among many Florida plumbing and HVAC professionals
- Vertex power vent gas water heater is popular in Florida market
- NEXT Hybrid electric heat pump is comparable to Rheem ProTerra
- Strong 12-year warranty on premium lines
- Better availability through professional plumbing contractors
Cons
- Less available at retail stores—typically requires professional contractor purchase
- Generally priced slightly higher than comparable Rheem models
- Less accessible for DIY replacement
Side-by-Side Comparison
| Rheem | A.O. Smith | |
|---|---|---|
| Retail Availability | Home Depot, Lowe's statewide | Primarily through plumbing contractors |
| Top Efficiency Model | ProTerra Hybrid Electric (3.75 UEF) | NEXT Hybrid Electric (3.70 UEF) |
| Gas Models for FL | Rheem Performance Platinum (0.93 EF) | Vertex/Signature (0.94 EF) |
| Warranty (tank heaters) | 6-12 years depending on model | 6-12 years depending on model |
| Warranty (hybrid/tankless) | 12 years (ProTerra) | 12 years (NEXT Hybrid) |
| Price Range (50-gal electric) | $500-$1,200+ depending on model | $500-$1,200+ depending on model |
| Florida Suitability | Excellent—strong hard water resistance on premium models | Excellent—anode rod and glass lining rated for Florida water |
Frequently Asked Questions
Is a heat pump water heater worth it in Florida?
Current federal note: the IRS says the Residential Clean Energy Credit is unavailable for residential property placed in service after December 31, 2025. Do not subtract the former credit from a 2026 residential proposal.
What's the typical water heater lifespan in Florida?
Conventional tank water heaters last 10-13 years in Florida. Florida's hard water (high mineral content) accelerates sediment buildup and anode rod depletion. Flushing your tank annually and replacing the anode rod every 3-4 years extends lifespan. Heat pump water heaters generally last 13-15 years. Tankless water heaters last 20+ years but require annual descaling in Florida's hard water areas.
Should I choose tankless or tank water heater in Florida?
For most Florida families, a hybrid heat pump tank water heater offers the best combination of efficiency, cost, and reliability. Tankless heaters make more sense for small households, second homes with intermittent use, or applications needing unlimited hot water. The upfront cost of tankless installation is typically $1,000-$2,000 higher than a tank replacement.