Gas Tankless Water Heaters

Loading Image
Gas tankless water heaters can use either natural gas or liquid propane for their fuel source and be installed either indoors or outdoors. If you are looking for this type of versatility, shop our wide selection of gas tankless water heaters from the top brands and find the perfect match today.
Tools & Articles
How to Pick the Perfect Tankless Water Heater
What Size Tankless Water Heater Do I Need
Filter By
  • Best Selling
  • Price: Low to High
  • Price: High to Low
  • Name: A-Z
  • Name: Z-A
  • Recommends Only
  • Closeouts Only
  • In-stock Only
  • Next Day Air Only
  • Availability
Model Number T-H3-DV-N is the Number 1 Seller
Learn More About Takagi T-H3-DV-N
$944.10
Was 
$1,049.00
SAVE $104.90
In-Stock
Freight Icon
Free Shipping
Learn More About Free Freight
Model Number T-H3M-DV-N is the Number 2 Seller
Learn More About Takagi T-H3M-DV-N
$629.10
Was 
$699.00
SAVE $69.90
Factory-Direct
Freight Icon
Free Shipping
Learn More About Free Freight
Model Number NR98-OD-NG is the Number 3 Seller
Learn More About Noritz NR98-OD-NG
$1,239.00
In-Stock
Freight Icon
Free Shipping
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Model Number RTG-84XLN is the Number 4 Seller
Learn More About Rheem Tankless RTG-84XLN
Rheem Tankless
EnergyStar Non-Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD rule 1146.2 Compliant). Ratings: 7.8 GPM at 40 F Rise, 6.1 GPM at 50 F Rise, 5.1 GPM at 60 F Rise, 4.3 GPM at 70 F Rise.
3% Buy This
$799.00
Factory-Direct
Freight Icon
Free Shipping
Learn More About Free Freight
Model Number RTG-95XLN is the Number 5 Seller
Learn More About Rheem Tankless RTG-95XLN
Rheem Tankless
EnergyStar Non-Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD rule 1146.2 Compliant). Ratings: 8.5 GPM at 40 F Rise, 6.6 GPM at 50 F Rise, 5.5 GPM at 60 F Rise, 4.7 GPM at 70 F Rise.
3% Buy This
$959.00
Factory-Direct
Freight Icon
Free Shipping
Learn More About Free Freight
Learn More About Rheem Tankless RTGH-95DVLN
Rheem Tankless
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD rule 1146.2 Compliant). Ratings: 9.5 GPM at 40 F Rise, 7.7 GPM at 50 F Rise, 6.4 GPM at 60 F Rise, 5.5 GPM at 70 F Rise.
3% Buy This
$1,034.10
Was 
$1,149.00
SAVE $114.90
Factory-Direct
Freight Icon
Free Shipping
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Takagi TK-110U-I-N
Takagi
Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 5.8 GPM at 40° F Rise, 4.5 GPM at 50° F Rise, 3.9 GPM at 60° F Rise, 3.3 GPM at 70° F Rise. 115k Effective BTU/h.
2% Buy This
$539.10
Was 
$599.00
SAVE $59.90
Only 4 In-Stock
Freight Icon
Free Shipping
Learn More About Free Freight
Learn More About Rinnai V65EP
Rinnai
EnergyStar Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 6.2 GPM at 40
2% Buy This
$714.61
In-Stock
Freight Icon
Free Shipping
Learn More About Free Freight
Learn More About Rheem Tankless RTG-84DVLN
Rheem Tankless
EnergyStar Non-Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD rule 1146.2 Compliant). Ratings: 7.8 GPM at 40 F Rise, 6.1 GPM at 50 F Rise, 5.1 GPM at 60 F Rise, 4.3 GPM at 70 F Rise.
2% Buy This
$719.10
Was 
$799.00
SAVE $79.90
Factory-Direct
Freight Icon
Free Shipping
Learn More About Free Freight
Learn More About Takagi T-H3M-DV-P
$629.10
Was 
$699.00
SAVE $69.90
Factory-Direct
Freight Icon
Free Shipping
Learn More About Free Freight
Learn More About Rheem Tankless RTGH-95DVLP
$1,034.10
Was 
$1,149.00
SAVE $114.90
Factory-Direct
Freight Icon
Free Shipping
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Takagi T-H3-DV-P
$944.10
Was 
$1,049.00
SAVE $104.90
Factory-Direct
Freight Icon
Free Shipping
Learn More About Free Freight
Learn More About Noritz NR98-OD-LP
EnergyStar Non-Condensing Water Heater. Ultra Low Nox Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 8.4 GPM at 40 F Rise, 6.7 GPM at 50 F Rise, 5.6 GPM at 60 F Rise, 4.8 GPM at 70 F Rise. 199.9k Effective BTU/h.
2% Buy This
$1,239.00
Factory-Direct
Freight Icon
Free Shipping
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Takagi TK-110U-E-N
$494.10
Was 
$549.00
SAVE $54.90
In-Stock
Freight Icon
Free Shipping
Learn More About Free Freight
Learn More About Noritz NR98-SV-NG
EnergyStar Non-Condensing Water Heater. Ultra Low Nox Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 8.4 GPM at 40
2% Buy This
$1,239.00
In-Stock
Freight Icon
Free Shipping
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Rheem Tankless RTGH-84DVLN
Rheem Tankless
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD rule 1146.2 Compliant). Ratings: 7.5 GPM at 40 F Rise, 6 GPM at 50 F Rise, 5 GPM at 60 F Rise, 4.3 GPM at 70 F Rise.
2% Buy This
$836.10
Was 
$929.00
SAVE $92.90
Factory-Direct
Freight Icon
Free Shipping
Learn More About Free Freight
Learn More About Rheem Tankless RTGH-84DVLP
$836.10
Was 
$929.00
SAVE $92.90
Factory-Direct
Freight Icon
Free Shipping
Learn More About Free Freight
Learn More About Rinnai V94IP
$1,024.20
In-Stock
Freight Icon
Free Shipping
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Rinnai V53DEN
Rinnai
EnergyStar Water Heater. Low NOx Emissions (< 40 ng/J or 55 PPM). Ratings: 4.9 GPM at 40
2% Buy This
$583.20
In-Stock
Freight Icon
Free Shipping
Learn More About Free Freight
Learn More About Takagi TK-310U-I-N
Takagi
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. 156k Effective BTU/h.
1% Buy This
$729.00
Factory-Direct
Freight Icon
Free Shipping
Learn More About Free Freight
Learn More About Rheem Tankless RTG-70XLN
Rheem Tankless
EnergyStar Non-Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD rule 1146.2 Compliant). Ratings: 6.5 GPM at 40 F Rise, 5.4 GPM at 50 F Rise, 4.5 GPM at 60 F Rise, 3.9 GPM at 70 F Rise.
1% Buy This
$699.00
Factory-Direct
Freight Icon
Free Shipping
Learn More About Free Freight
Learn More About Takagi TK-310U-E-N
$656.10
Was 
$729.00
SAVE $72.90
In-Stock
Freight Icon
Free Shipping
Learn More About Free Freight
Learn More About Takagi T-H3M-OS-P
Takagi
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.
1% Buy This
$656.10
Was 
$729.00
SAVE $72.90
Only 1 In-Stock
Freight Icon
Free Shipping
Learn More About Free Freight
Learn More About Noritz NRC111-DV-NG
EnergyStar Condensing Water Heater. Ultra Low NOx Emissions (SCAQMD Rule 1146.2 Compliant). Ratings: 9.3 GPM at 40 F Rise, 7.4 GPM at 50 F Rise, 6.2 GPM at 60 F Rise, 5.3 GPM at 70 F Rise. 184k Effective BTU/h.
1% Buy This
$1,499.00
In-Stock
Freight Icon
Free Shipping
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Flow Rate at 40F Rise
Flow Rate at 50F Rise
Flow Rate at 60F Rise
Flow Rate at 70F Rise