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Bosch Thermotechnology (8)
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Adapter (1)
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Maximum Input Capacity (BTU)
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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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70000 - 99999 (1)
100000 - 129999 (22)
130000 - 159999 (14)
160000 - 189999 (49)
190000 - 219999 (80)
250000 - 279999 (1)
280000 - 309999 (5)
370000 - 399999 (3)
490000+ (1)
Energy Factor
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Energy Factor
Energy Factor (EF) is a measurement of water heater energy efficiency. The higher the energy factor, the more efficient the water heater.
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0.95 (7)
0.99 (2)
3.06 (1)
3.17 (1)
AFUE (%)
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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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84 (2)
88 (2)
97 (1)
98 (8)
Vent Type
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Vent Type
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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Concentric Vent (20)
Direct Vent (89)
Outdoor (No Venting) (63)
Power Vent (4)
Fuel Type
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Fuel Type
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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Electric (71)
Indirect Fired (40)
Liquid Propane (70)
Natural Gas (106)
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Single-Speed (1)
Three-Speed (1)
Flow Rate at 40F Temperature Rise (GPM)
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Flow Rate at 40F Temperature Rise (GPM)
Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location.
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0 (29)
1 (18)
2 (6)
3 (1)
4 (4)
5 (19)
6 (16)
7 (22)
8 (43)
9 (52)
10 (2)
13 (4)
Product Status
Discontinued (87)
Available (301)
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Rinnai Concentric Venting Condensing Horizontal Termination Kit - 21"
Model: 223177PP
(3)
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$73.00
Free Shipping
In-Stock
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Rinnai Concentric Venting Condensing Vent Pipe Extension - 19.5"
Model: 224079PP
(3)
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$29.00
Free Shipping
In-Stock
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Rinnai Concentric Venting Condensing Vent Pipe Extension - 39"
Model: 224080PP
(3)
Q&A
(1)
$37.00
Free Shipping
In-Stock
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A.O. Smith ATI-110U - Residential 140,000 BTU - Natural Gas Tankless Water Heater - Power Vent
Model: ATI-110U-N
(4)
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$845.00
Free Shipping
Factory-Direct!
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A.O. Smith ATI-510U - Residential 199,000 BTU - Natural Gas Tankless Water Heater - Indoor
Model: ATI-510U-N
(4)
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2% Check Discount
$1,059.00
Free Shipping
Factory-Direct!
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Bosch T9800 SE 199 - Residential 199,000 BTU - Natural Gas Tankless Water Heater - Indoor
Model: T9800 SE 199
(4)
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2% Check Discount
$1,813.00
Free Shipping
Factory-Direct!
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Rinnai 11.5" - Universal Non-Condensing Horizontal Termination Kit - Metal Inner/Plastic Outer
Model: 223181
(2)
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$89.00
Free Shipping
In-Stock
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Rinnai 804000074 Condensate Neutralizer Kit
Model: 804000074
(2)
Q&A
(1)
$115.00
Free Shipping
In-Stock
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Rinnai Concentric Venting Condensing Roof Discharge Termination - 38"
Model: 184162PP
(2)
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$70.00
Free Shipping
In-Stock
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Rinnai Concentric Venting Condensing Vent Pipe Extension - 10"
Model: 224087PP
(2)
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$22.00
Free Shipping
In-Stock
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Taco 003 - Plumb N' Plug - 1/40 HP - Circulator Pump - Bronze - Analog Timer - 1/2" Sweat
Model: 003-BC4-PNP
(2)
Q&A
(1)
$511.44
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In-Stock
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Taco 006 - Plumb N' Plug - 1/40 HP - Circulator Pump - Bronze - Analog Timer - 3/4" Sweat
Model: 006-B4-PNP
(2)
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$511.44
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Amtrol Therm-X-Trol - 2 Gallon - In-Line Thermal Expansion Tank
Model: ST-5
(2)
Q&A
(1)
$66.00
Free Shipping
In-Stock
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Amtrol Therm-X-Trol - 34 Gallon - Vertical Thermal Expansion Tank
Model: ST-60V
(2)
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$596.00
Free Shipping
Only 4 In-Stock
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Rheem RTG - Residential 160,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Model: RTG-70XLN
(3)
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Offer Ends Tuesday, December 31
$804.00
$675.50
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In-Stock
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Crown Boiler Mega-Stor 2 - 30 Gallon - Indirect Water Heater
Model: MS2-030
(2)
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2% Check Discount
$1,340.00
Free Freight
Free Lift Gate
Factory-Direct!
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Crown Boiler Mega-Stor 2 - 40 Gallon - Indirect Water Heater
Model: MS2-040
(2)
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2% Check Discount
$1,417.00
Free Freight
Free Lift Gate
Factory-Direct!
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A.O. Smith FPTU-66 - 66 Gallon Capacity - Residential Heat Pump Water Heater
Model: FPTU-66
(3)
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2% Check Discount
$2,153.00
Free Freight
Free Lift Gate
In-Stock
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A.O. Smith FPTU-80 - 80 Gallon Capacity - Residential Hybrid Electric Heat Pump Water Heater
Model: FPTU-80
(3)
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2% Check Discount
$2,640.00
Free Freight
Free Lift Gate
In-Stock
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Bosch T9800 SE 160 - Residential 160,000 BTU - Natural Gas Tankless Water Heater - Indoor
Model: T9800 SE 160
(3)
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2% Check Discount
$1,596.00
Free Shipping
Factory-Direct!
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Bosch T9800 SEO 199 - Residential 199,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Model: T9800 SEO 199
(3)
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2% Check Discount
$1,775.00
Free Shipping
Factory-Direct!
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Bosch T9800 SEO 160 - Residential 160,000 BTU - Natural Gas Tankless Water Heater - Outdoor
Model: T9800 SEO 160
(3)
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2% Check Discount
$1,556.00
Free Shipping
Factory-Direct!
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Bosch T9900 SE 160 - Residential 160,000 BTU - Natural Gas Tankless Water Heater - Indoor
Model: T9900 SE 160
(3)
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2% Check Discount
$1,888.00
Free Shipping
Factory-Direct!
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Amtrol Diatrol - 0.75 Gallon - Water Hammer Arrestor
Model: 537-1
(1)
Q&A
(1)
$176.00
Free Shipping
Factory-Direct!
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