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Gas Tankless Water Heaters
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AO Smith® (29)
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11.4" (3)
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23-5/8 in H x 17-3/4 in W x 11-1/4 in D (6)
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20.75 in (3)
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33.25 in (7)
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12.375 in (5)
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14.05 in (1)
15.625 in (7)
16.19 in (6)
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25 (4)
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20 (4)
20.75" (3)
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28" (5)
29.5" (2)
30.11" (2)
33.25" (7)
36.75" (6)
Type
Tankless (1)
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AO Smith®
AO Smith® 100227678 ATI-310C Tankless Water Heater, Natural Gas Fuel, 190000 Btu/hr Heating, Indoor, Non-Condensing, 8 gpm Flow Rate, Concentric Vent, 3 in, 5 in Vent, 0.82, Commercial/Residential
Part #
107307
MFG #
100227678
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AO Smith®
AO Smith® 100227685 ATI-510C Tankless Water Heater, Natural Gas Fuel, 199000 Btu/hr, Indoor, Non-Condensing, 10 gpm, 3 in, 5 in Concentric Vent, 0.82, Residential
Part #
107308
MFG #
100227685
Add to Cart
Compare
AO Smith®
AO Smith® 100227698 ATO-110U Tankless Water Heater, Natural Gas Fuel, 140000 Btu/hr Heating, Outdoor, Non-Condensing, 6.6 gpm Flow Rate, Direct/Power Vent, 0.81, Commercial/Residential
Part #
544429
MFG #
ATO-110-U
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AO Smith®
AO Smith® 100384228 ATM-160M-N Adapt™ SC Standard Condensing Ultra-Low NOx 160,000 BTU Natural Gas Tankless Water Heater
Part #
1283044
MFG #
100384228
Add to Cart
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AO Smith®
AO Smith® 100384229 ATM-180M-N Adapt™ SC Standard Condensing Ultra-Low NOx 180,000 BTU Natural Gas Tankless Water Heater
Part #
1283053
MFG #
100384229
Add to Cart
Compare
AO Smith®
AO Smith® 100384230 ATM-199M-N Adapt™ SC Standard Condensing Ultra-Low NOx 199,000 BTU Natural Gas Tankless Water Heater
Part #
1283062
MFG #
100384230
Add to Cart
Compare
AO Smith®
AO Smith® Adapt™+ 100374800 ATHR-160X3 Tankless Water Heater, Natural Gas Fuel, 160000 Btu/hr Heating, Indoor/Outdoor, Condensing, 10.5 gpm Flow Rate, Direct/Power Vent, 0.95, Residential
Part #
1245415
MFG #
100374800
Add to Cart
Compare
AO Smith®
AO Smith® Adapt™+ 100374811 ATHR-180X3 Tankless Water Heater, Natural Gas Fuel, 180000 Btu/hr Heating, Indoor/Outdoor, Condensing, 10.5 gpm Flow Rate, Direct/Power Vent, 0.95, Residential
Part #
1245424
MFG #
100374811
Add to Cart
Compare
AO Smith®
AO Smith® Adapt™+ 100374812 ATHR-199X3 Tankless Water Heater, Natural Gas Fuel, 199000 Btu/hr Heating, Indoor/Outdoor, Condensing, 10.5 gpm Flow Rate, Direct/Power Vent, 0.95, Residential
Part #
1245433
MFG #
100374812
Add to Cart
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AO Smith®
AO Smith® ProLine® 100123378 ATI-540H Tankless Water Heater, Natural Gas Fuel, 199000 Btu/hr Heating, Indoor, Condensing, 10 gpm Flow Rate, Direct/Power Vent, 3 in, 4 in Vent, 0.95, Commercial/Residential
Part #
101933
MFG #
100123378
Add to Cart
Compare
AO Smith®
AO Smith® 100227678 ATI-310C Tankless Water Heater, Natural Gas Fuel, 190000 Btu/hr Heating, Indoor, Non-Condensing, 8 gpm Flow Rate, Concentric Vent, 3 in, 5 in Vent, 0.82, Commercial/Residential
Part #
107307
MFG #
100227678
Add to Cart
Compare
AO Smith®
AO Smith® 100227685 ATI-510C Tankless Water Heater, Natural Gas Fuel, 199000 Btu/hr, Indoor, Non-Condensing, 10 gpm, 3 in, 5 in Concentric Vent, 0.82, Residential
Part #
107308
MFG #
100227685
Add to Cart
Compare
AO Smith®
AO Smith® 100227698 ATO-110U Tankless Water Heater, Natural Gas Fuel, 140000 Btu/hr Heating, Outdoor, Non-Condensing, 6.6 gpm Flow Rate, Direct/Power Vent, 0.81, Commercial/Residential
Part #
544429
MFG #
ATO-110-U
Add to Cart
Compare
AO Smith®
AO Smith® 100384228 ATM-160M-N Adapt™ SC Standard Condensing Ultra-Low NOx 160,000 BTU Natural Gas Tankless Water Heater
Part #
1283044
MFG #
100384228
Add to Cart
Compare
AO Smith®
AO Smith® 100384229 ATM-180M-N Adapt™ SC Standard Condensing Ultra-Low NOx 180,000 BTU Natural Gas Tankless Water Heater
Part #
1283053
MFG #
100384229
Add to Cart
Compare
AO Smith®
AO Smith® 100384230 ATM-199M-N Adapt™ SC Standard Condensing Ultra-Low NOx 199,000 BTU Natural Gas Tankless Water Heater
Part #
1283062
MFG #
100384230
Add to Cart
Compare
AO Smith®
AO Smith® Adapt™+ 100374800 ATHR-160X3 Tankless Water Heater, Natural Gas Fuel, 160000 Btu/hr Heating, Indoor/Outdoor, Condensing, 10.5 gpm Flow Rate, Direct/Power Vent, 0.95, Residential
Part #
1245415
MFG #
100374800
Add to Cart
Compare
AO Smith®
AO Smith® Adapt™+ 100374811 ATHR-180X3 Tankless Water Heater, Natural Gas Fuel, 180000 Btu/hr Heating, Indoor/Outdoor, Condensing, 10.5 gpm Flow Rate, Direct/Power Vent, 0.95, Residential
Part #
1245424
MFG #
100374811
Add to Cart
Compare
AO Smith®
AO Smith® Adapt™+ 100374812 ATHR-199X3 Tankless Water Heater, Natural Gas Fuel, 199000 Btu/hr Heating, Indoor/Outdoor, Condensing, 10.5 gpm Flow Rate, Direct/Power Vent, 0.95, Residential
Part #
1245433
MFG #
100374812
Add to Cart
Compare
AO Smith®
AO Smith® ProLine® 100123378 ATI-540H Tankless Water Heater, Natural Gas Fuel, 199000 Btu/hr Heating, Indoor, Condensing, 10 gpm Flow Rate, Direct/Power Vent, 3 in, 4 in Vent, 0.95, Commercial/Residential
Part #
101933
MFG #
100123378
Add to Cart
Sort by
Best Match
Product: A to Z
Product: Z to A
Brand: A to Z
Brand: Z to A
Product List View
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