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To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
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Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.
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Maximum Input Capacity (BTU)
The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
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Uniform Energy Factor
Uniform Energy Factor (UEF) is a measurement of water heater energy efficiency. The higher the energy factor, the more efficient the water heater.
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AFUE (%)
AFUE (Annual Fuel Utilization Efficiency) measures the efficiency of combustion equipment over the entire heating season, and is calculated by dividing the amount of energy that is actually heating your home by the total energy contained in the fuel used by the boiler/furnace.
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80 (2)
82 (2)
First Hour Delivery (Gallons)
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First Hour Delivery (Gallons)
Sometimes called First Hour Rating, this is the number of gallons of hot water the heater can supply per hour when starting with a fully heated tank. The recovery of the water heater depends on your boiler's BTU and boiler output temperature.
70 - 109 (5)
110 - 149 (1)
150 - 189 (4)
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A.O. Smith ATI-510C - 5.5 GPM at 60° F Rise - 0.81 UEF - Gas Tankless Water Heater - Concentric Vent
Model: ATI-510C-N
(6)
Closeout
$900.00
Was
$1,059.00
SAVE $159.00
Only 1 In-Stock
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A.O. Smith Pro - AOW-AS20 - Inline Descaler System
Model: 100314968
1" NPT Connection
20% Buy This
(3)
$119.00
Factory-Direct
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A.O. Smith - AOW-S500 - Salt Based Water Softener - 49,800 Grain Capacity
Model: 100037597
Minimum Capacity/Salt: 8,650 grains/1.66 lbs - Middle Capacity/Salt: 33,410 grains/8 lbs - Maximum Capacity/Salt: 49,800 grains/15 lbs
7% Buy This
(9)
$599.00
Factory-Direct
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A.O. Smith - 75 Gal. Storage - 189 Gal. First Hour Delivery - 96% Thermal Efficiency - 0.86 UEF - Natural Gas Water Heater - Direct Vent
Model: GDHE-75
129 GPH Continuous Recovery Rate at 90
7% Buy This
(1)
$4,049.00
Factory-Direct
Free Shipping & Lift Gate
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2% Check Discount
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2% Check Discount
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A.O. Smith - 80 Gal. Storage - 86 Gal. First Hour Delivery - 3.45 UEF - Heat Pump Water Heater
Model: HPTU-80N
4.5kW Heating Element.
6% Buy This
(7)
$2,129.00
In-Stock
Free Shipping & Lift Gate
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Free Shipping & Lift Gate
*This product qualifies for
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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 may apply, see our full shipping policy for more details.
2% Check Discount
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A.O. Smith - 100 Gal. Storage - 305 Gal. First Hour Delivery - 97% Thermal Efficiency - Liquid Propane Water Heater - Direct Vent
Model: BTH-199-LP
261 GPH Continuous Recovery Rate at 90
6% Buy This
(1)
$5,999.00
Only 3 In-Stock
Free Shipping & Lift Gate
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2% Check Discount
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2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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A.O. Smith - 100 Gal. Storage - 305 Gal. First Hour Delivery - 97% Thermal Efficiency - Natural Gas Water Heater - Direct Vent
Model: BTH-199
261 GPH Continuous Recovery Rate at 90
8% Buy This
(1)
Add to Cart for Price
Backordered
Est. Ship Date Mar 19
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2% Check Discount
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A.O. Smith - 119 Gal. Storage - 659 Gal. First Hour Delivery - 95% Thermal Efficiency - Natural Gas Water Heater - Direct Vent - ASME Certified
Model: BTH-500A
640 GPH Continuous Recovery Rate at 90
5% Buy This
(2)
$11,350.00
In-Stock
Free Shipping & Lift Gate
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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 may apply, see our full shipping policy for more details.
2% Check Discount
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2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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A.O. Smith ATO-540P - 6.3 GPM at 60° F Rise - 0.95 UEF - Gas Tankless Water Heater - Outdoor
Model: ATO-540P-N
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.
4% Buy This
(1)
$1,299.00
Factory-Direct
Free Shipping
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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 may apply, see our full shipping policy for more details.
2% Check Discount
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2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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A.O. Smith Pro - AOW-3000-R - Carbon, Claryum® and Membrane Replacement Filter for AOW-3000
Model: 100315006
3% Buy This
Write a Review
$149.00
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Only 2 In-Stock
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A.O. Smith Pro - AOW-AS20-R - Inline Descaler Replacement Cartridge for AOW-AS20
Model: 100315008
3% Buy This
Write a Review
$75.00
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Only 3 In-Stock
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A.O. Smith - 66 Gal. Storage - 80 Gal. First Hour Delivery 3.17 EF Heat Pump Water Heater
Model: FPTU-66
4.5kW Heating Element.
3% Buy This
(3)
$1,749.00
Factory-Direct
Free Shipping & Lift Gate
×
Free Shipping & Lift Gate
*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 may apply, see our full shipping policy for more details.
2% Check Discount
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2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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A.O. Smith ATO-540H - 6.3 GPM at 60° F Rise - 0.95 UEF - Propane Tankless Water Heater - Outdoor
Model: ATO-540H-P
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. 189k Effective BTU/h.
3% Buy This
(1)
$1,099.00
Factory-Direct
Free Shipping
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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 may apply, see our full shipping policy for more details.
2% Check Discount
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2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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A.O. Smith - 100 Gal. Storage - 361 Gal. First Hour Delivery - 96% Thermal Efficiency - Natural Gas Water Heater - Direct Vent
Model: BTH-250
323 GPH Continuous Recovery Rate at 90
2% Buy This
(1)
Add to Cart for Price
Only 5 In-Stock
Free Shipping & Lift Gate
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Free Shipping & Lift Gate
*This product qualifies for
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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 may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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A.O. Smith Pro - AOW-2000-R - Claryum® Replacement Filter for AOW-2000
Model: 100315002
2% Buy This
Write a Review
$99.00
Subscription Eligible
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Subscription Eligible
*This product is
Subscription Eligible
and can be set up to auto-deliver filters to your home at a discounted price. You select the filter quality, delivery frequency, and quantity.
Factory-Direct
Subscription Eligible
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Subscription Eligible
*This product is
Subscription Eligible
and can be set up to auto-deliver filters to your home at a discounted price. You select the filter quality, delivery frequency, and quantity.
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A.O. Smith ATI-540P - 6.3 GPM at 60° F Rise - 0.93 UEF - Gas Tankless Water Heater - Direct Vent
Model: ATI-540P-N
2% Buy This
(8)
$1,349.00
In-Stock
Free Shipping
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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 may apply, see our full shipping policy for more details.
2% Check Discount
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2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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A.O. Smith - 50 Gal. Storage - 70 Gal. First Hour Delivery - 3.42 UEF - Heat Pump Water Heater
Model: HPTU-50N
4.5kW Heating Element.
2% Buy This
(8)
$1,429.00
In-Stock
Free Shipping & Lift Gate
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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 may apply, see our full shipping policy for more details.
2% Check Discount
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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A.O. Smith 50.0 Gal - 240V / 3 Ph Commercial Tank Water Heater
Model: DEL-50
2% Buy This
Write a Review
$1,779.00
Factory-Direct
Free Shipping & Lift Gate
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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 may apply, see our full shipping policy for more details.
2% Check Discount
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Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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A.O. Smith ATI-540H - 6.3 GPM at 60° F Rise - 0.93 UEF - Propane Tankless Water Heater - Direct Vent
Model: ATI-540H-P
1% Buy This
(10)
$1,139.00
Factory-Direct
Free Shipping
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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 may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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A.O. Smith ATI-140H - 3.8 GPM at 60° F Rise - 0.90 UEF - Gas Tankless Water Heater - Direct Vent
Model: ATI-140H-N
1% Buy This
(10)
$749.00
Only 1 In-Stock
Free Shipping
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A.O. Smith ATI-340H - 5.7 GPM at 60° F Rise - 0.95 UEF - Gas Tankless Water Heater - Direct Vent
Model: ATI-340H-N
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.
1% Buy This
(10)
$1,029.00
In-Stock
Free Shipping
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*This product qualifies for
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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 may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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A.O. Smith - AOW-S400 - Salt Based Water Softener - 34,800 Grain Capacity
Model: 100037605
Minimum Capacity/Salt: 5,210 grains/1lb - Middle Capacity/Salt: 28,775 grains/8 lbs - Maximum Capacity/Salt: 34,800 grains/15 lbs
1% Buy This
(6)
$499.00
Factory-Direct
Free Shipping & Lift Gate
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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 may apply, see our full shipping policy for more details.
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A.O. Smith - 119 Gal. Storage - 432 Gal. First Hour Delivery - 96% Thermal Efficiency - Natural Gas Water Heater - Direct Vent
Model: BTH-300
388 GPH Continuous Recovery Rate at 90
1% Buy This
(1)
$8,743.00
Factory-Direct
Free Shipping & Lift Gate
×
Free Shipping & Lift Gate
*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 may apply, see our full shipping policy for more details.
2% Check Discount
×
2% Check Discount
Save 2% instantly by using our convenient "e-check" option or by simply mailing us a paper check. Yes, your order will be delayed slightly (5 business days). But, if you can wait, the savings are significant.
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A.O. Smith Pro - AOW-100 - High Flow Faucet Filter
Model: 100314965
3/8" Push Fit, 1.5 GPM High Flow Faucet.
1% Buy This
Write a Review
$135.00
Only 1 In-Stock
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