Shop Best Gas Water Heaters 2021

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$891.99
Rheem RRTGH84DVLN3701171 Rheem RTGH Series 8.4 GPM 157,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Amazon.com
129
Free shipping
$891.99
Rheem RRTGH84DVLN3701171 Rheem RTGH Series 8.4 GPM 157,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Amazon.com
129
$799.99
Reliance 40 Gal 40000 BTU Natural Gas Water Heater
Ace Hardware
$799.99
Reliance 40 Gal 40000 BTU Natural Gas Water Heater
Ace Hardware
$953.00
Rheem RTG-84DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater, 8.4 GPM
Amazon.com
91
Free shipping
$953.00
Rheem RTG-84DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater, 8.4 GPM
Amazon.com
91
$867.23
Rheem RTG-84XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 8.4 GPM
Amazon.com
2
Free shipping
$867.23
Rheem RTG-84XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 8.4 GPM
Amazon.com
2
$1,259.99
Reliance 50 Gal 40000 BTU Natural Gas Water Heater
Ace Hardware
$1,259.99
Reliance 50 Gal 40000 BTU Natural Gas Water Heater
Ace Hardware
$669.00
A.O. Smith Signature 100 50-Gallons Tall 6-Year Warranty 40000-BTU Natural Gas Water Heater | G6N-T5040NVR
Lowe's
1K+
$669.00
A.O. Smith Signature 100 50-Gallons Tall 6-Year Warranty 40000-BTU Natural Gas Water Heater | G6N-T5040NVR
Lowe's
1K+
$799.00
A.O. Smith Signature 100 40-Gallon Tall 9-Year Warranty 40000-BTU Natural Gas Water Heater | G9-UT4040NVR
Lowe's
298
$799.00
A.O. Smith Signature 100 40-Gallon Tall 9-Year Warranty 40000-BTU Natural Gas Water Heater | G9-UT4040NVR
Lowe's
298
$699.00
A.O. Smith Signature 100 40-Gallon Tall 9-Year Warranty 40000-BTU Natural Gas Water Heater | G9-T4040NVR
Lowe's
$699.00
A.O. Smith Signature 100 40-Gallon Tall 9-Year Warranty 40000-BTU Natural Gas Water Heater | G9-T4040NVR
Lowe's
$709.00
A.O. Smith Signature 100 40-Gallons Short 9-Year Warranty 40000-BTU Natural Gas Water Heater | G9-S4040NVR
Lowe's
$709.00
A.O. Smith Signature 100 40-Gallons Short 9-Year Warranty 40000-BTU Natural Gas Water Heater | G9-S4040NVR
Lowe's
$1,179.99
Reliance 40 Gal 40000 BTU Natural Gas Water Heater
Ace Hardware
$1,179.99
Reliance 40 Gal 40000 BTU Natural Gas Water Heater
Ace Hardware
$1,513.73
NEW Rinnai rx180in Condensing Smart Sense Natural Gas Or Propane Tankless Water Heater, Indoor Or Outdoor Water Heater, Up To 10 GPM, 180,000 BTU
Amazon.com
Free shipping
$1,513.73
NEW Rinnai rx180in Condensing Smart Sense Natural Gas Or Propane Tankless Water Heater, Indoor Or Outdoor Water Heater, Up To 10 GPM, 180,000 BTU
Amazon.com
Free shipping
$632.87
Dometic WH-10GEA 10-Gallon Water Heater, Gas/Electric
Amazon.com
90
Free shipping
$632.87
Dometic WH-10GEA 10-Gallon Water Heater, Gas/Electric
Amazon.com
90
$1,693.49
Rinnai cx199in Condensing Smart Sense Commercial Natural Gas Or Propane Tankless Water Heater, 199,000 BTU, 11.1 GPM
Amazon.com
10
Free shipping
$1,693.49
Rinnai cx199in Condensing Smart Sense Commercial Natural Gas Or Propane Tankless Water Heater, 199,000 BTU, 11.1 GPM
Amazon.com
10
$650.19
Furrion Tankless Gas Water Heater With Antifreeze Protection- 2.4GPM, White
Amazon.com
Free shipping
$650.19
Furrion Tankless Gas Water Heater With Antifreeze Protection- 2.4GPM, White
Amazon.com
Free shipping
$1,009.99
Reliance 50 Gal 37,000 BTU Propane Water Heater
Ace Hardware
$1,009.99
Reliance 50 Gal 37,000 BTU Propane Water Heater
Ace Hardware
$939.99
Reliance 50 Gal 37,000 BTU Propane Water Heater
Ace Hardware
$939.99
Reliance 50 Gal 37,000 BTU Propane Water Heater
Ace Hardware
$1,193.25
Rheem RTGH-95DVELN-3 Super High Efficiency Condensing Indoor Tankless Natural Gas Water Heater, 9.5 GPM With Wifi
Amazon.com
22
Free shipping
$1,193.25
Rheem RTGH-95DVELN-3 Super High Efficiency Condensing Indoor Tankless Natural Gas Water Heater, 9.5 GPM With Wifi
Amazon.com
22
$399.00
Ranein Natural Gas Tankless Water Heater With Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
Amazon.com
227
Free shipping
$399.00
Ranein Natural Gas Tankless Water Heater With Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
Amazon.com
227
$1,260.00
AO Smith XCR-40, 40 Gal Proline® Gas Water Heater
Craft Supply
$1,260.00
AO Smith XCR-40, 40 Gal Proline® Gas Water Heater
Craft Supply
$299.00
Ranein Natural Gas Tankless Water Heater, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater
Amazon.com
507
Free shipping
$299.00
Ranein Natural Gas Tankless Water Heater, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater
Amazon.com
507
$399.00
MIZUDO MIZUDO Natural Gas Tankless Water Heater Indoor Non-Direct Vent, Max 4.3 GPM 100,000 BTU CSA Certified 3/4" NPT On Demand Instant Hot Water
Amazon.com
289
Free shipping
$399.00
MIZUDO MIZUDO Natural Gas Tankless Water Heater Indoor Non-Direct Vent, Max 4.3 GPM 100,000 BTU CSA Certified 3/4" NPT On Demand Instant Hot Water
Amazon.com
289
$1,669.00
Rheem IKONIC rectgh-s11in Professional Grade Super High Efficiency Condensing Tankless Natural Gas Water Heater, 11.2 GPM
Amazon.com
Free shipping
$1,669.00
Rheem IKONIC rectgh-s11in Professional Grade Super High Efficiency Condensing Tankless Natural Gas Water Heater, 11.2 GPM
Amazon.com
Free shipping
$349.99
Aquah Indoor Natural Gas Tankless Water Heater 16L / 4.3 Gpm, Whole House
Amazon.com
$349.99
Aquah Indoor Natural Gas Tankless Water Heater 16L / 4.3 Gpm, Whole House
Amazon.com
$994.00
A.O. Smith Signature 100 40-Gallon Short 6-Year Warranty 38000-BTU Direct Vent Natural Gas Water Heater | G6-DVS4038NVL
Lowe's
$994.00
A.O. Smith Signature 100 40-Gallon Short 6-Year Warranty 38000-BTU Direct Vent Natural Gas Water Heater | G6-DVS4038NVL
Lowe's
$219.90
VEVOR Rv Tankless Water Heater 15x15 in Propane Gas 42000BTU With Controller
VEVOR
$219.90
VEVOR Rv Tankless Water Heater 15x15 in Propane Gas 42000BTU With Controller
VEVOR
$89.00
$155.00
Instant Water Heater Tankless
Until Times Up
42% off
$89.00
$155.00
Instant Water Heater Tankless
Until Times Up
$1,151.29
$1,564.60
NEW Rinnai rx199in Condensing Smart Sense Natural Gas Or Propane Tankless Water Heater, Indoor, Up
Aliexpress
Free shipping
26% off
$1,151.29
$1,564.60
NEW Rinnai rx199in Condensing Smart Sense Natural Gas Or Propane Tankless Water Heater, Indoor, Up
Aliexpress
Free shipping
$789.99
Reliance 40 Gal 35,500 BTU Propane Water Heater
Ace Hardware
$789.99
Reliance 40 Gal 35,500 BTU Propane Water Heater
Ace Hardware
$1,259.99
Reliance 6.6 Gal 160000 BTU Natural Gas Tankless Water Heater
Ace Hardware
$1,259.99
Reliance 6.6 Gal 160000 BTU Natural Gas Tankless Water Heater
Ace Hardware
$408.28
$562.99
Suburban Direct Spark Ignition (D Model) Gas Water Heater, 6 Gallons | Camping World
Camping World
2
Free shipping
27% off
$408.28
$562.99
Suburban Direct Spark Ignition (D Model) Gas Water Heater, 6 Gallons | Camping World
Camping World
2
$102.15
$163.44
A.O. Smith GCR-40 Promax Plus High Efficiency Gas Water Heater, 40 Gal
Saasforge
37% off
$102.15
$163.44
A.O. Smith GCR-40 Promax Plus High Efficiency Gas Water Heater, 40 Gal
Saasforge
$269.99
Camplux 8L Propane Tankless Water Heater
The Cabin Depot US
1
$269.99
Camplux 8L Propane Tankless Water Heater
The Cabin Depot US
1
$979.99
GE Realmax Platinum 50-Gallon Tall Natural Gas Atmospheric Water Heater 56.6 H X 22.0 W X 22.0 D In White
Wayfair
10
Free shipping
$979.99
GE Realmax Platinum 50-Gallon Tall Natural Gas Atmospheric Water Heater 56.6 H X 22.0 W X 22.0 D In White
Wayfair
10
$529.00
$679.99
Suburban 6-Gallon SW6DEL Gas Water Heater, Direct Spark Ignition / Electric | Camping World
Camping World
Free shipping
22% off
$529.00
$679.99
Suburban 6-Gallon SW6DEL Gas Water Heater, Direct Spark Ignition / Electric | Camping World
Camping World
Free shipping
$209.99
VEVOR Rv Tankless Water Heater 15x15 in Propane Gas 42000BTU With Controller
VEVOR
17
$209.99
VEVOR Rv Tankless Water Heater 15x15 in Propane Gas 42000BTU With Controller
VEVOR
17
$1,336.30
Rinnai Re199en Natural Gas Wall-Mounted Outdoor Tankless Water Heater - 120V, 199,000 BTU, 9.8 GPM
WebstaurantStore
52
29% off
$1,336.30
Rinnai Re199en Natural Gas Wall-Mounted Outdoor Tankless Water Heater - 120V, 199,000 BTU, 9.8 GPM
WebstaurantStore
52
What Is the Best Gas Water Heater? 2025 Buyers Guide Review
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The best electric heaters to buy now for all budgets and spaces
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Shop Best Gas Water Heaters 2021

Sponsored
About our ads
$891.99
Rheem RRTGH84DVLN3701171 Rheem RTGH Series 8.4 GPM 157,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Amazon.com
129
Free shipping
$891.99
Rheem RRTGH84DVLN3701171 Rheem RTGH Series 8.4 GPM 157,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Amazon.com
129
$799.99
Reliance 40 Gal 40000 BTU Natural Gas Water Heater
Ace Hardware
$799.99
Reliance 40 Gal 40000 BTU Natural Gas Water Heater
Ace Hardware
$953.00
Rheem RTG-84DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater, 8.4 GPM
Amazon.com
91
Free shipping
$953.00
Rheem RTG-84DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater, 8.4 GPM
Amazon.com
91
$867.23
Rheem RTG-84XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 8.4 GPM
Amazon.com
2
Free shipping
$867.23
Rheem RTG-84XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 8.4 GPM
Amazon.com
2
$1,259.99
Reliance 50 Gal 40000 BTU Natural Gas Water Heater
Ace Hardware
$1,259.99
Reliance 50 Gal 40000 BTU Natural Gas Water Heater
Ace Hardware
$669.00
A.O. Smith Signature 100 50-Gallons Tall 6-Year Warranty 40000-BTU Natural Gas Water Heater | G6N-T5040NVR
Lowe's
1K+
$669.00
A.O. Smith Signature 100 50-Gallons Tall 6-Year Warranty 40000-BTU Natural Gas Water Heater | G6N-T5040NVR
Lowe's
1K+
$799.00
A.O. Smith Signature 100 40-Gallon Tall 9-Year Warranty 40000-BTU Natural Gas Water Heater | G9-UT4040NVR
Lowe's
298
$799.00
A.O. Smith Signature 100 40-Gallon Tall 9-Year Warranty 40000-BTU Natural Gas Water Heater | G9-UT4040NVR
Lowe's
298
$699.00
A.O. Smith Signature 100 40-Gallon Tall 9-Year Warranty 40000-BTU Natural Gas Water Heater | G9-T4040NVR
Lowe's
$699.00
A.O. Smith Signature 100 40-Gallon Tall 9-Year Warranty 40000-BTU Natural Gas Water Heater | G9-T4040NVR
Lowe's
$709.00
A.O. Smith Signature 100 40-Gallons Short 9-Year Warranty 40000-BTU Natural Gas Water Heater | G9-S4040NVR
Lowe's
$709.00
A.O. Smith Signature 100 40-Gallons Short 9-Year Warranty 40000-BTU Natural Gas Water Heater | G9-S4040NVR
Lowe's
$1,179.99
Reliance 40 Gal 40000 BTU Natural Gas Water Heater
Ace Hardware
$1,179.99
Reliance 40 Gal 40000 BTU Natural Gas Water Heater
Ace Hardware
$1,513.73
NEW Rinnai rx180in Condensing Smart Sense Natural Gas Or Propane Tankless Water Heater, Indoor Or Outdoor Water Heater, Up To 10 GPM, 180,000 BTU
Amazon.com
Free shipping
$1,513.73
NEW Rinnai rx180in Condensing Smart Sense Natural Gas Or Propane Tankless Water Heater, Indoor Or Outdoor Water Heater, Up To 10 GPM, 180,000 BTU
Amazon.com
Free shipping
$632.87
Dometic WH-10GEA 10-Gallon Water Heater, Gas/Electric
Amazon.com
90
Free shipping
$632.87
Dometic WH-10GEA 10-Gallon Water Heater, Gas/Electric
Amazon.com
90
$1,693.49
Rinnai cx199in Condensing Smart Sense Commercial Natural Gas Or Propane Tankless Water Heater, 199,000 BTU, 11.1 GPM
Amazon.com
10
Free shipping
$1,693.49
Rinnai cx199in Condensing Smart Sense Commercial Natural Gas Or Propane Tankless Water Heater, 199,000 BTU, 11.1 GPM
Amazon.com
10
$650.19
Furrion Tankless Gas Water Heater With Antifreeze Protection- 2.4GPM, White
Amazon.com
Free shipping
$650.19
Furrion Tankless Gas Water Heater With Antifreeze Protection- 2.4GPM, White
Amazon.com
Free shipping
$1,009.99
Reliance 50 Gal 37,000 BTU Propane Water Heater
Ace Hardware
$1,009.99
Reliance 50 Gal 37,000 BTU Propane Water Heater
Ace Hardware
$939.99
Reliance 50 Gal 37,000 BTU Propane Water Heater
Ace Hardware
$939.99
Reliance 50 Gal 37,000 BTU Propane Water Heater
Ace Hardware
$1,193.25
Rheem RTGH-95DVELN-3 Super High Efficiency Condensing Indoor Tankless Natural Gas Water Heater, 9.5 GPM With Wifi
Amazon.com
22
Free shipping
$1,193.25
Rheem RTGH-95DVELN-3 Super High Efficiency Condensing Indoor Tankless Natural Gas Water Heater, 9.5 GPM With Wifi
Amazon.com
22
$399.00
Ranein Natural Gas Tankless Water Heater With Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
Amazon.com
227
Free shipping
$399.00
Ranein Natural Gas Tankless Water Heater With Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
Amazon.com
227