A-o--smith Tankless Water Heaters
Explore A-o--smith’s technology, innovation and top-rated collections
Introduction
- Brand History
- A.O. Smith has been a leading water heating manufacturer since 1874, with over 150 years of experience in the industry. The company began producing tankless water heaters in the early 2000s and has become a major player in the North American market.
- Reputation
- Known for reliability, durability, and innovation in water heating solutions. A.O. Smith is recognized as one of the top water heater brands in North America with strong dealer networks and customer support.
- Specialization
- Focuses on both residential and commercial water heating solutions, with particular expertise in gas and electric tankless units, hybrid systems, and energy-efficient technologies.
Technologies & Innovation
- Proprietary Features
- Features include Intelligent Temperature Control, self-diagnostic systems, freeze protection, and advanced heat exchangers. Many models include built-in recirculation pumps and temperature memory functions.
- Energy Efficiency
- Offers units with up to 0.96 UEF (Unified Energy Factor) ratings and ENERGY STAR certified models. Condensing technology captures and reuses heat from exhaust gases for maximum efficiency.
- Smart Controls
- iCOMM intelligent communication technology allows for system monitoring and diagnostics. Compatible with smart home systems and offers remote monitoring capabilities through mobile apps.
- Certifications
- ENERGY STAR certified models, AHRI certified, meets ANSI standards, and complies with various regional efficiency requirements including California's Title 24.
Best Use Cases
- Residential Use
- Excellent for homes with moderate to high hot water demand, families of 2-6 people, and retrofit applications. Particularly suitable for homes wanting to save space and reduce energy costs.
- Commercial Use
- Well-suited for small to medium commercial applications including restaurants, salons, offices, and multi-unit residential buildings. Offers commercial-grade models for higher demand applications.
- Climate Compatibility
- Performs well in most climates with freeze protection down to -30°F. Condensing models work efficiently in colder climates, while non-condensing units are suitable for warmer regions.
- Installation Types
- Supports both indoor and outdoor installations, direct vent and power vent configurations, and can be installed in series for higher capacity needs.
Why Choose A-o--smith?
- Unique Selling Points
- Strong brand recognition, extensive dealer network, comprehensive product line from basic to premium models, excellent customer service, and proven track record in water heating industry.
- Comparative Advantages
- Competitive pricing compared to premium brands while maintaining quality, wide availability of parts and service, user-friendly controls, and good balance of features across price points.
- Warranty
- Offers up to 15-year limited warranty on heat exchangers and up to 5-year warranty on parts, with some models including labor coverage. Extended warranty options available through authorized dealers.
A-o--smith Best Sellers
| Image | Product Name | SKU | List Price | Low Price | Reviews | Rating | Action |
|---|---|---|---|---|---|---|---|
 | EcoSmart Electric Tankless Water Heater Eco 11 | 7518328603500429114 | — | $189.99 | 452 | 4.2/5 | View Details |
 | A.O. Smith Signature Series Tankless Water Heater GT15-240-NI | 8278911865008573754 | — | $869.00 | 72 | 4/5 | View Details |
 | A.O. Smith Signature Series 240-Volt 14-KW 1.6-GPM Tankless Electric Water Heater | 8765418685588834278 | — | $349.00 | 64 | 2.7/5 | View Details |
 | A.O. Smith Signature Series Tankless Water Heater | 11104048418006062411 | — | $825.00 | 63 | 2.6/5 | View Details |
 | A.O. Smith Signature Premier Tankless Water Heater, Compact, Variable Temperature, Beige, 8GPM, Natural Gas | 190000 BTU/h | 120 V | 15 A | 2968216935662298161 | — | $899.99 | 63 | 2.6/5 | View Details |
 | A.O. Smith Signature Series Tankless Electric Water Heater | 2347660602099718144 | — | $629.00 | 55 | 2.8/5 | View Details |
 | A.O. Smith Signature 100 2.5-Gallon Compact 6-Year Warranty 1440-Watt 1 Element Point | 307638352162186776 | — | $199.00 | 42 | 3.5/5 | View Details |
 | A.O. Smith ATI-540H Tankless Water Heater | 1666685042534751399 | — | $1,369.00 | 22 | 4.8/5 | View Details |
 | Optimal 12 Opti Electric Tankless Water Heater | 9565322888870009029 | — | $499.00 | 17 | 4.8/5 | View Details |
 | AO Smith ATI-140H-P 120,000 BTU ATI-140H Condensing Ultra-Low NOx Indoor Tankless Water Heater | 12891830314073883233 | — | $875.93 | 17 | 4.6/5 | View Details |
 | A.O. Smith Signature Select 8-GPM 190000-BTU Outdoor Natural Gas Tankless Water Heater | 1357283400171844545 | — | $825.00 | 8 | 3.5/5 | View Details |
 | A.O. Smith ATI-140H Tankless Water Heater | 16702523613067275866 | — | $877.88 | 7 | 3.8/5 | View Details |
 | A.O. Smith ATI-540P-N 199000 BTU Natural Gas Tankless Water Heater | 15591095164070429088 | — | $1,686.00 | 6 | 3.7/5 | View Details |
 | A.O. Smith Signature Series 6.6-GPM 160000-BTU Outdoor Natural Gas Tankless Water Heater | 12575735454368363050 | — | $940.00 | 4 | 5/5 | View Details |
 | AO Smith ATI-110U Tankless Water Heater | 13205772996440064158 | — | $929.89 | 3 | 5/5 | View Details |
 | A.O. Smith Signature Series Tankless Water Heater GT15-510C-I | 9274435792633717172 | — | $925.00 | 3 | 2/5 | View Details |
 | AO Smith R4LA-240E 24 Kilowatt 240 Volt 4-Chamber Residential Electric Tankless Water Heater | 5628529519541549741 | — | $618.51 | 3 | 1/5 | View Details |
 | A.O. Smith ATI-310-N Tankless Water Heater | 169568470528551610 | — | $1,064.00 | 1 | 5/5 | View Details |
 | AO Smith ATO-310U Tankless Water Heater | 6059430775157831352 | — | $1,006.06 | 1 | 5/5 | View Details |
 | AO Smith ATO-240H-N 160,000 BTU ATO-240H Condensing Ultra-Low NOx Outdoor Tankless Water Heater | 13583257916935634338 | — | $1,109.00 | 1 | 5/5 | View Details |
 | A.O. Smith ATO-540P 199000 BTU Natural Gas Tankless Water Heater | 5829628496806683751 | — | $1,629.00 | 1 | 5/5 | View Details |
 | A.O. Smith Signature Series Ultra High Efficiency Tankless Water Heater | 11857802605199614459 | — | $2,229.00 | 1 | 5/5 | View Details |
 | AO Smith ATI-310U Tankless Water Heater | 6667964738600752507 | — | $1,259.00 | 1 | 5/5 | View Details |
 | A.O. Smith ProLine XE Tankless Water Heater | 16093314414661062412 | — | $1,726.70 | 1 | 4/5 | View Details |
 | A.O. Smith X3 Residential 199000 BTU Liquid Propane Tankless Water Heater | 18186145108351240561 | — | $1,605.10 | 1 | 4/5 | View Details |
 | AO Smith UPVA-70E Point-of-Use Commercial Electric Tankless Water Heater | 17156422489827053555 | — | $276.99 | 1 | 1/5 | View Details |
 | AO Smith Adapt Tankless Water Heater ATHR-160M | 13743497158881196351 | — | $1,447.00 | /5 | View Details | |
 | A.O. Smith Signature Series Tankless Water Heater GT15-540-NO | 13977249858026066202 | — | $1,235.00 | /5 | View Details | |
 | AO Smith Adapt Tankless Water Heater ATHR-160X3 | 17829780849497591875 | — | $1,892.77 | /5 | View Details | |
 | AO Smith R4LA-180E 18 Kilowatt 240 Volt Residential Indoor Electric Tankless Water Heater | 15301815100391040542 | — | $506.43 | /5 | View Details | |
 | A. O. Smith ProLine XE Outdoor Non-Condensing 199,000 BTU Propane Gas Tankless Water Heater, Instantaneous | Beige | Propane Liquid | 11307804173541885509 | — | $1,079.10 | /5 | View Details | |
 | A.O. Smith X3 Tankless Water Heater | 14256187272368954228 | — | $1,334.25 | /5 | View Details | |
 | AO Smith ATI-510CX3 120 Volt Residential Liquid Propane Natural Gas Tankless Water Heater | 17092545726588218156 | — | $1,842.52 | /5 | View Details | |
 | A.O. Smith ATI-510U Tankless Water Heater | 1441225968234226368 | — | $1,642.87 | /5 | View Details | |
 | AO Smith ATI-510C-N 4.7 GPM 199000 BTU 120 Volt Residential Natural Gas Tankless | 1201877852196928331 | — | $1,259.00 | /5 | View Details | |
 | A.O. Smith ATI-310-P Tankless Water Heater | 2252065221073628936 | — | $1,225.00 | /5 | View Details | |
 | A.O. Smith ProLine XE 199000 BTU Indoor Propane Tankless Water Heater | 16661960154308003711 | — | $1,726.70 | /5 | View Details | |
 | AO Smith ATHR-199X3 Natural Gas Tankless Water Heater | 10788808941033233376 | — | $2,346.76 | /5 | View Details | |
 | A.O. Smith X3 Residential Tankless Water Heater | 10457858809319027629 | — | $1,464.95 | /5 | View Details | |
 | A.O. Smith ATO-140H Outdoor Natural Gas Tankless Water Heater | 15865517548131616245 | — | $917.00 | /5 | View Details |
A-o--smith Collections
EZ Series
Designed for fast and easy tankless upgrades, featuring top-mounted connections that simplify replacement of traditional tank water heaters.
Released: 2019-05-15
Key Features
- High-efficiency condensing (96% UEF)
- 25-year heat exchanger warranty
NRCR Series
Flagship recirculation line with built-in pump providing instant hot water to every fixture.
Released: 2020-11-01
Key Features
- Dual stainless heat exchangers
- Wi-Fi compatibility
- Intelligent recirculation
NRC Series
Dependable condensing units offering high output and excellent thermal efficiency, up to 9.8 GPM.
Released: 2018-08-20
Key Features
- Compact to heavy-duty models
- Long-lasting dual exchanger
ecoTOUGH Series
Eco-friendly line meeting stricter emissions and efficiency standards, ideal for green installs.
Released: 2021-03-10
Key Features
- Low NOx emissions
- ENERGY STAR certified
ProTOUGH Series
Built for contractors with rugged commercial-grade components and extended warranties.
Released: 2022-01-05
Key Features
- Commercial-grade construction
- Extended warranty options
ValueSolutions Series
Budget-friendly, non-condensing models offering reliable performance without premium price.
Released: 2017-06-12
Key Features
- Lower upfront cost
- Proven Noritz quality
NCC Series
Commercial cascade lineup handling up to 199,900 BTU for large-scale hot water demands.
Released: 2019-09-30
Key Features
- Cascadable for higher capacity
- Robust commercial output
NRCB Series
Combination boiler units delivering both space heating and domestic hot water in one compact package.
Released: 2020-07-22
Key Features
- Space heating + DHW
- High efficiency condensing