Rheem
A.O. Smith
Rheem vs A.O. Smith
Expert head-to-head water heater comparison by Nassau County installers with 10+ years installing both brands on Long Island.
Head-to-Head Scorecard
Rheem
0 wins
A.O. Smith
0 wins
Dead heat — choose by your priorities
Performance Score Rings
Rheem
premiumTop Strengths
- Industry leader in all water heater types
- Excellent Long Island parts availability
- ProTerra hybrid heat pump line
Watch Out For
- Premium pricing
- Some models require dedicated gas line upgrades
A.O. Smith
premiumTop Strengths
- 150+ years of water heater expertise
- Excellent tank durability
- Blue Diamond glass coating
Watch Out For
- Higher price point
- Some premium features dealer-exclusive
←Swipe to compare→
Expert Verdict
Rheem and A. O. Smith are the two largest water heater makers in North America and build directly comparable tanks, tankless, and hybrid models. Decide on the exact model, warranty document, and how fast the unit can be on site.
Pick Rheem when…
The Rheem model matches your fuel, venting, and recovery needs, or you want its hybrid heat pump lineup and app controls.
Full Rheem reviewPick A.O. Smith when…
The A. O. Smith equivalent is better stocked for your size and fuel, or your installer standardizes on A. O. Smith parts.
Full A.O. Smith reviewCategory-by-Category Breakdown
Click any category to see why one brand wins.
Full Specification Comparison
| Spec | Rheem | A.O. Smith |
|---|---|---|
| Overall Rating |
4.8/5
|
4.7/5
|
| Price Range (Installed) |
$1.2k – $5.5k
|
$1.1k – $5.0k
|
| Efficiency (UEF / COP) |
0.67–3.75
|
0.65–3.5
|
| Parts Warranty |
12 years
|
12 years
|
| Tank Warranty |
12 years
|
12 years
|
| Heater Types |
Tank, Tankless, Hybrid Heat Pump
|
Tank, Tankless, Hybrid Heat Pump
|
| Founded |
1925
|
1874
|
| Country |
USA
|
USA
|
| Parent Company |
Rheem Manufacturing
|
A.O. Smith Corporation
|
Warranty Comparison Timeline
* All warranties shown assume product registration. Unregistered units typically receive 5-year coverage.
Visual Comparison
Pros & Cons
Rheem
Strengths
- Industry leader in all water heater types
- Excellent Long Island parts availability
- ProTerra hybrid heat pump line
- EcoNet smart connectivity
Weaknesses
- Premium pricing
- Some models require dedicated gas line upgrades
A.O. Smith
Strengths
- 150+ years of water heater expertise
- Excellent tank durability
- Blue Diamond glass coating
- iCOMM smart connectivity
Weaknesses
- Higher price point
- Some premium features dealer-exclusive
Need Help Choosing Between Rheem and A.O. Smith?
Our EPA 608-certified technicians install both brands daily. Get a free, no-pressure quote.
Long Island Installation Guide
Long Island Installation Guide
Because these two brands are so close on paper, the deciding factor on a Long Island job is usually what is on the truck today and what the installation requires: venting, drain pan and condensate for a condensing or hybrid unit, thermal expansion control, and a permit where the fuel or venting changes.
Climate Zone 4A
Coastal Salt Air
PSEG Rebates
Customer Reviews
❓Rheem vs A.O. Smith FAQ
Is Rheem or A.O. Smith better for Long Island homes?
Rheem and A. O. Smith are the two largest water heater makers in North America and build directly comparable tanks, tankless, and hybrid models. Decide on the exact model, warranty document, and how fast the unit can be on site.
Which is cheaper to install in Nassau County, Rheem or A.O. Smith?
Rheem ranges from $1.2k – $5.5k installed, while A.O. Smith ranges from $1.1k – $5.0k installed in Nassau County.
Are Rheem and A.O. Smith made by the same company?
No. Rheem is made by Rheem Manufacturing, while A.O. Smith is made by A.O. Smith Corporation.
What warranty does Rheem offer vs A.O. Smith?
Rheem offers 12 years parts warranty. A.O. Smith offers 12 years parts warranty.
Still Deciding?
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