A.O. Smith Residential Hot Water Heaters

Learn More About A.O. Smith ATI-310C-Nacw-sale-badge
A.O. Smith ATI-310C - Residential 190,000 BTU - Natural Gas Tankless Water Heater - Concentric Vent
Write A Review
Item#: 69982
Model#: ATI-310C-N
Brand: A.O. Smith
$981.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith ATI-310C - Residential 190,000 BTU - Natural Gas Tankless Water Heater - Concentric Vent
Learn More About A.O. Smith ATI-340H-Pacw-sale-badge
A.O. Smith ATI-340H - Residential 180,000 BTU - Liquid Propane Tankless Water Heater - Indoor
Write A Review
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 8.0 GPM at 40° F Rise, 6.8 GPM at 50° F Rise, 5.7 GPM at 60° F Rise, 4.8 GPM at 70° F Rise. 171k Effective BTU/h.
Item#: 69983
Model#: ATI-340H-P
Brand: A.O. Smith
$1,142.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith ATI-340H - Residential 180,000 BTU - Liquid Propane Tankless Water Heater - Indoor
Learn More About A.O. Smith ATI-510C-Nacw-sale-badge
A.O. Smith ATI-510C - Residential 199,000 BTU - Natural Gas Tankless Water Heater - Indoor
Write A Review
Item#: 69985
Model#: ATI-510C-N
Brand: A.O. Smith
$1,160.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith ATI-510C - Residential 199,000 BTU - Natural Gas Tankless Water Heater - Indoor
Learn More About A.O. Smith ATI-510U-Nacw-sale-badge
A.O. Smith ATI-510U - Residential 199,000 BTU - Natural Gas Tankless Water Heater - Indoor
Write A Review
EnergyStar Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 8.3 GPM at 40° F Rise, 6.9 GPM at 50° F Rise, 5.5 GPM at 60° F Rise, 4.8 GPM at 70° F Rise. 199k Max BTU/h.
Item#: 69986
Model#: ATI-510U-N
Brand: A.O. Smith
$1,059.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith ATI-510U - Residential 199,000 BTU - Natural Gas Tankless Water Heater - Indoor
Learn More About A.O. Smith ATO-140H-Nacw-sale-badge
A.O. Smith ATO-140H - Residential 120,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Write A Review
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 5.4 GPM at 40° F Rise, 4.4 GPM at 50° F Rise, 3.8 GPM at 60° F Rise, 3.2 GPM at 70° F Rise. 112k Effective BTU/h.
Item#: 69991
Model#: ATO-140H-N
Brand: A.O. Smith
$845.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith ATO-140H - Residential 120,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Learn More About A.O. Smith ATO-140H-Pacw-sale-badge
A.O. Smith ATO-140H - Residential 120,000 BTU - Liquid Propane Tankless Water Heater - Outdoor
Write A Review
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 5.4 GPM at 40° F Rise, 4.4 GPM at 50° F Rise, 3.8 GPM at 60° F Rise, 3.2 GPM at 70° F Rise. 112k Effective BTU/h.
Item#: 69992
Model#: ATO-140H-P
Brand: A.O. Smith
$845.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith ATO-140H - Residential 120,000 BTU - Liquid Propane Tankless Water Heater - Outdoor
Learn More About A.O. Smith ATO-240H-Pacw-sale-badge
A.O. Smith ATO-240H - Residential 180,000 BTU - Liquid Propane Tankless Water Heater - Outdoor
Write A Review
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 6.7 GPM at 40° F Rise, 6.1 GPM at 50° F Rise, 5.0 GPM at 60° F Rise, 4.3 GPM at 70° F Rise. 171k Effective BTU/h.
Item#: 69994
Model#: ATO-240H-P
Brand: A.O. Smith
Originally $1,324.36$1,022.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith ATO-240H - Residential 180,000 BTU - Liquid Propane Tankless Water Heater - Outdoor
Learn More About A.O. Smith ATO-310U-Nacw-sale-badge
A.O. Smith ATO-310U - Residential 190,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Write A Review
EnergyStar Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 7.9 GPM at 40° F Rise, 6.2 GPM at 50° F Rise, 5.3 GPM at 60° F Rise, 4.5 GPM at 70° F Rise. 190k Max BTU/h.
Item#: 69996
Model#: ATO-310U-N
Brand: A.O. Smith
$849.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith ATO-310U - Residential 190,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Learn More About A.O. Smith ATO-340H-Nacw-sale-badge
A.O. Smith ATO-340H - Residential 180,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Write A Review
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 8.0 GPM at 40° F Rise, 6.8 GPM at 50° F Rise, 5.7 GPM at 60° F Rise, 4.8 GPM at 70° F Rise. 171k Effective BTU/h.
Item#: 69998
Model#: ATO-340H-N
Brand: A.O. Smith
Originally $1,479.80$1,142.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith ATO-340H - Residential 180,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Learn More About A.O. Smith ATO-340H-Pacw-sale-badge
A.O. Smith ATO-340H - Residential 180,000 BTU - Liquid Propane Tankless Water Heater - Outdoor
Write A Review
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 8.0 GPM at 40° F Rise, 6.8 GPM at 50° F Rise, 5.7 GPM at 60° F Rise, 4.8 GPM at 70° F Rise. 171k Effective BTU/h.
Item#: 69999
Model#: ATO-340H-P
Brand: A.O. Smith
Originally $1,479.80$1,142.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith ATO-340H - Residential 180,000 BTU - Liquid Propane Tankless Water Heater - Outdoor
Learn More About A.O. Smith Tank GDHE-75acw-sale-badge
A.O. Smith GDHE-75 - 75 Gallon Capacity - Residential Natural Gas Tank Water Heater - Direct Vent
Write A Review
129 GPH Continuous Recovery Rate at 90
Item#: 70005
Model#: GDHE-75
Brand: A.O. Smith Tank
$5,012.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
In-Stock
A.O. Smith GDHE-75 - 75 Gallon Capacity - Residential Natural Gas Tank Water Heater - Direct Vent
Learn More About A.O. Smith Tank GPHE-50acw-sale-badge
A.O. Smith GPHE-50 - 50 Gallon Capacity -Residential Natural Gas Tank Water Heater - Direct Vent
Write A Review
Item#: 70006
Model#: GPHE-50
Brand: A.O. Smith Tank
$3,141.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
In-Stock
A.O. Smith GPHE-50 - 50 Gallon Capacity -Residential Natural Gas Tank Water Heater - Direct Vent
Learn More About A.O. Smith Tank FPTU-66acw-sale-badge
A.O. Smith FPTU-66 - 66 Gallon Capacity - Residential Heat Pump Water Heater
Write A Review
4.5kW Heating Element.
Item#: 72559
Model#: FPTU-66
Brand: A.O. Smith Tank
$2,153.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
In-Stock
A.O. Smith FPTU-66 - 66 Gallon Capacity - Residential Heat Pump Water Heater
Learn More About A.O. Smith Tank FPTU-80acw-sale-badge
A.O. Smith FPTU-80 - 80 Gallon Capacity - Residential Hybrid Electric Heat Pump Water Heater
Write A Review
4.5kW Heating Element.
Item#: 72560
Model#: FPTU-80
Brand: A.O. Smith Tank
$2,640.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Learn More
Free Lift Gate
*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
In-Stock
A.O. Smith FPTU-80 - 80 Gallon Capacity - Residential Hybrid Electric Heat Pump Water Heater
Learn More About A.O. Smith ATI-540P-Nacw-sale-badge
A.O. Smith ATI-540P - Residential 199,000 BTU - Natural Gas Tankless Water Heater - Indoor
Write A Review
EnergyStar Condensing Water Heater. Ultra-Low NOx (14 ng/J or 20 ppm). Ratings: 9.5 GPM at 40° F Rise, 7.5 GPM at 50° F Rise, 6.3 GPM at 60° F Rise, 5.4 GPM at 70° F Rise. 199k Max BTU/h.
Item#: 76482
Model#: ATI-540P-N
Brand: A.O. Smith
Sale: $1,301.00
On Sale Through 10/31
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
In-Stock
A.O. Smith ATI-540P - Residential 199,000 BTU - Natural Gas Tankless Water Heater - Indoor
Learn More About A.O. Smith ATI-540P-Pacw-sale-badge
A.O. Smith ATI-540P - Residential 199,000 BTU - Liquid Propane Tankless Water Heater - Indoor
Write A Review
EnergyStar Condensing Water Heater. Ultra-Low NOx (14 ng/J or 20 ppm). Ratings: 9.5 GPM at 40° F Rise, 7.5 GPM at 50° F Rise, 6.3 GPM at 60° F Rise, 5.4 GPM at 70° F Rise. 199k Max BTU/h.
Item#: 76483
Model#: ATI-540P-P
Brand: A.O. Smith
Sale: $1,450.00
On Sale Through 10/31
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith ATI-540P - Residential 199,000 BTU - Liquid Propane Tankless Water Heater - Indoor
Learn More About A.O. Smith ATO-540P-Nacw-sale-badge
A.O. Smith ATO-540P - Residential 199,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Write A Review
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 9.5 GPM at 40° F Rise, 7.5 GPM at 50° F Rise, 6.3 GPM at 60° F Rise, 5.4 GPM at 70° F Rise. 199k Effective BTU/h.
Item#: 76484
Model#: ATO-540P-N
Brand: A.O. Smith
$1,501.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith ATO-540P - Residential 199,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Learn More About A.O. Smith ATO-540P-Pacw-sale-badge
A.O. Smith ATO-540P - Residential 199,000 BTU - Liquid Propane Tankless Water Heater - Outdoor
Write A Review
EnergyStar Condensing Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 9.5 GPM at 40° F Rise, 7.5 GPM at 50° F Rise, 6.3 GPM at 60° F Rise, 5.4 GPM at 70° F Rise. 199k Effective BTU/h.
Item#: 76485
Model#: ATO-540P-P
Brand: A.O. Smith
$1,501.00
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Factory-Direct
A.O. Smith ATO-540P - Residential 199,000 BTU - Liquid Propane Tankless Water Heater - Outdoor
Learn More About A.O. Smith Tank PXGT-40acw-sale-badge
A.O. Smith ProLine® XE - 240V Single Phase Water Heater - 40 Gal. Storage - 59 Gal. First Hour Delivery - 0.93 UEF - Leak Detection - Tall
Write A Review
Item#: 117120
Model#: PXGT-40
Brand: A.O. Smith Tank
$1,096.97
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Local Pickup Only
Factory-Direct
A.O. Smith ProLine® XE - 240V Single Phase Water Heater - 40 Gal. Storage - 59 Gal. First Hour Delivery - 0.93 UEF - Leak Detection - Tall
Learn More About A.O. Smith Tank HWR-40-NGacw-sale-badge
A.O. Smith ProLine® Master - 40 Gal. Storage - 80 Gal. First Hour Delivery - 0.59 UEF - Natural Gas Water Heater - Tall
Write A Review
Item#: 117121
Model#: HWR-40-NG
Brand: A.O. Smith Tank
$945.96
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Local Pickup Only
Factory-Direct
A.O. Smith ProLine® Master - 40 Gal. Storage - 80 Gal. First Hour Delivery - 0.59 UEF - Natural Gas Water Heater - Tall
Learn More About A.O. Smith Tank HNS-40acw-sale-badge
A.O. Smith ProLine® Master - 240V Single Phase Water Heater - 40 Gal. Storage - 55 Gal. First Hour Delivery - 0.92 UEF - Short
Write A Review
Item#: 117122
Model#: HNS-40
Brand: A.O. Smith Tank
$701.25
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Local Pickup Only
Factory-Direct
A.O. Smith ProLine® Master - 240V Single Phase Water Heater - 40 Gal. Storage - 55 Gal. First Hour Delivery - 0.92 UEF - Short
Learn More About A.O. Smith Tank HWRL-40-NGacw-sale-badge
A.O. Smith ProLine® Master - 40 Gal. Storage - 67 Gal. First Hour Delivery - 0.59 UEF - Natural Gas Water Heater - Atmospheric Vent - Short
Write A Review
Item#: 117123
Model#: HWRL-40-NG
Brand: A.O. Smith Tank
$945.96
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Local Pickup Only
Factory-Direct
A.O. Smith ProLine® Master - 40 Gal. Storage - 67 Gal. First Hour Delivery - 0.59 UEF - Natural Gas Water Heater - Atmospheric Vent - Short
Learn More About A.O. Smith Tank HWR-50-NGacw-sale-badge
A.O. Smith ProLine® Master - 50 Gal. Storage - 84 Gal. First Hour Delivery - 0.62 UEF - Natural Gas Water Heater - Atmospheric Vent - Tall
Write A Review
Item#: 117124
Model#: HWR-50-NG
Brand: A.O. Smith Tank
$1,085.57
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Local Pickup Only
Factory-Direct
A.O. Smith ProLine® Master - 50 Gal. Storage - 84 Gal. First Hour Delivery - 0.62 UEF - Natural Gas Water Heater - Atmospheric Vent - Tall
Learn More About A.O. Smith Tank HNT-50acw-sale-badge
A.O. Smith ProLine® Master - 240V Single Phase Water Heater - 50 Gal. Storage - 62 Gal. First Hour Delivery - 0.92 UEF - Tall
Write A Review
Item#: 117125
Model#: HNT-50
Brand: A.O. Smith Tank
$873.56
Free Shipping
Learn More
Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Local Pickup Only
Factory-Direct
A.O. Smith ProLine® Master - 240V Single Phase Water Heater - 50 Gal. Storage - 62 Gal. First Hour Delivery - 0.92 UEF - Tall