Indoor
CX360
- Listed flow
- 3.6 GPM
- Fuel options
- NG / LP variants
Climatech 3 · 82,000 BTU/h listed
$359.99 USD
RESIDENTIAL / GAS
Gas Tankless Water Heaters
Choose the right fuel. Then size for your coldest day.
Find on-demand gas hot water for your home. Narrow the range by natural gas or propane and indoor or outdoor installation, then check the flow your fixtures need at the same time.
Different demand.
Inlet70°F
+50°F rise
Outlet120°F
Inlet50°F
+70°F rise
Outlet120°F
Colder inlet water takes more heat per gallon. Compare flow at the temperature rise your home actually needs.
Illustrative temperatures. Check your model’s performance chart.THE GAS LINEUP
Match the model to the home.
Start with the fuel your property uses and the proposed installation location. Use listed GPM to browse the range, then check the exact model’s flow at your temperature rise.
18 heater models
Indoor
CX422
- Listed flow
- 4.22 GPM
- Fuel options
- NG / LP variants
Climatech 3 · 102,000 BTU/h listed
From $399.99 USD
Indoor
CX264
- Listed flow
- Check SKU
- Fuel options
- NG / LP variants
Check the flow rating for the exact SKU
$299.99 USD
Indoor
CM264
- Listed flow
- 2.64 GPM
- Fuel options
- NG / LP variants
Compact CM series · White
$299.99 USD
Indoor
CM264B
- Listed flow
- 2.64 GPM
- Fuel options
- NG / LP variants
Compact CM series · Black
$299.99 USD
Indoor
CA318WWT236
- Listed flow
- 3.18 GPM
- Fuel options
- Check model options
White · WT236 wall thimble bundle
$429.99 USD
Indoor
CA318WT236
- Listed flow
- 3.18 GPM
- Fuel options
- Check model options
Black · WT236 wall thimble bundle
$429.99 USD
Indoor
CA360
- Listed flow
- 3.6 GPM
- Fuel options
- NG / LP variants
Climatech 7 · Tempered-glass front
$429.99 USD
Indoor
CA422
- Listed flow
- 4.22 GPM
- Fuel options
- NG / LP variants
Climatech 7 · Tempered-glass touch panel
$499.99 USD
Indoor
CA528
- Listed flow
- 5.28 GPM
- Fuel options
- NG / LP variants
Climatech 7 · Tempered-glass front
$599.99 USD
Indoor
CA686
- Listed flow
- 6.86 GPM
- Fuel options
- NG / LP variants
Climatech 7 · Tempered-glass front
$699.99 USD
Indoor
CA318W
- Listed flow
- 3.18 GPM
- Fuel options
- NG / LP variants
White · Base model
From $349.99 USD
Indoor
CA318
- Listed flow
- 3.18 GPM
- Fuel options
- Natural gas
Black · Base model
$399.99 USD
Indoor
CA422G
- Listed flow
- 4.22 GPM
- Fuel options
- NG / LP variants
Gray · Standard CA series
$539.99 USD
Indoor
CA528M
- Listed flow
- 5.28 GPM
- Fuel options
- NG / LP variants
White · CA528M indoor series
$499.99 USD
Outdoor
WA528M
- Listed flow
- 5.28 GPM
- Fuel options
- NG / LP variants
WA528 outdoor series · White
$599.99 USD
Outdoor
WA686M
- Listed flow
- 6.86 GPM
- Fuel options
- NG / LP variants
WA686 outdoor series · White
$699.99 USD
Outdoor
WA528G
- Listed flow
- 5.28 GPM
- Fuel options
- NG / LP variants
WA528 outdoor series · Gray
$599.99 USD
No heaters in this view
Change the fuel, location or listed flow rating.
Listed flow is the published catalog figure. It is not a promise of winter flow or a count of showers.
YOUR SHORTLIST
Compare the details that matter.
Select two or three heater cards to compare.
YOUR COLDEST DAY
Estimate the load, then check the curve.
Size for the fixtures you expect to run together and the coldest inlet temperature you need to plan for. A bigger listed GPM does not tell you what the unit will deliver at that temperature rise.
TEMPERATURE RISEHeater outlet − cold inletCompare the resulting flow and rise with the exact SKU’s performance chart.
If the flow you measured mixes hot and cold water, the worksheet estimates how much of it the heater supplies.
U.S. DOE sizing guidanceWater demand worksheet
Example: 50°F inlet and 120°F outlet require a 70°F rise. A combined 3 GPM at 105°F uses about 2.36 GPM from the heater. Use those two numbers together when checking the chart.
BEFORE YOU ORDER
Send your installer a better shortlist.
Include the exact SKU, your fuel type, the proposed location and your flow at the required rise. Ask them to check these details against the current installation manual.
Fuel and supply
Verify the rating-plate gas type and the gas supply capacity under load. Natural gas and propane variants are separate choices.
Location and vent route
Confirm that the unit is listed for the location and that its approved vent, combustion air and termination requirements can be met.
Low-flow operation
Check the exact model’s activation flow and water pressure. A small draw can be below the point at which the burner starts.
Site conditions
Check power, altitude, freeze protection and service access. Confirm whether the installation needs condensate management.
INSTALLATION ACCESSORY
View details
VP70T
3-inch horizontal vent kit. Verify approved model compatibility.
Need help checking a model?
Start with the model manual. Share your shortlisted SKU and demand estimate with our team.
How much flow do I need in winter?
Add the hot-water-side flow for fixtures you expect to use together. Subtract the coldest inlet temperature from the planned heater outlet temperature. Compare both results with the exact SKU’s published performance curve.
Is the listed GPM the flow I will get at home?
The listed figure is a reference point for the range. Available flow depends on temperature rise and the selected model. Use a performance chart for your inlet and outlet temperatures rather than converting the listing into a number of showers.
Can I switch a natural gas model to propane?
Choose the fuel variant that matches the property and the unit’s rating plate. Treat the variants as separate choices. Do not assume a conversion is permitted; check the exact model documentation with your installer.
Can I reuse the vent from my old water heater?
Have your installer check the approved vent material, routing, termination and clearances for the new model. The vent requirements depend on the specific unit. Confirm any condensate management requirements at the same time.
Why might a very small draw not start the burner?
Tankless units require a minimum activation flow and suitable water pressure. Check the exact model’s requirements, especially if your priority is a low-flow faucet.
Will tankless hot water arrive faster at the tap?
The heater starts heating as water flows through it. Water already sitting in the pipe between the heater and the fixture still has to clear. Discuss pipe length and supported recirculation options with your installer.
Gas Tankless Water Heaters
Experience exceptional performance with Camplux’s Gas Tankless Water Heaters, ideal for residential use, providing instant and continuous hot water. Utilizing clean-burning gas technology, these heaters deliver superior efficiency and reliability, significantly lowering your energy consumption compared to traditional tank systems. Perfect for medium to large households, our gas tankless water heaters offer flexible installation options, sleek design, and excellent temperature control.
To fully customize your home water heating setup, browse our complete range including versatile Tankless Water Heaters, efficient Electric Tankless Water Heaters, or compact Electric Mini Tank Water Heaters for supplemental hot water storage.