CO-Z JSD-24
CO-Z JSD-24 is not in the current certification listing as of Oct 26, 2026.
It has a certified UEF of 0.83 and a certified flow of 3.1 gal/min at a 67°F rise.
- Gas tankless water heater
- 1 listed model
This model is not in the current certification listing as of Oct 26, 2026. It was last listed on Oct 2, 2026.
Certified figures
- Flow at a 67°F rise
- 3.1gallons per minute
- UEF
- 0.83Uniform energy factor
Your fixtures at once
Change your hour and flowFlow where you live
Colder incoming water needs a bigger rise, so the heater gives less flow.
- Cold water
- Cold water must be at least 10°F colder than the hot water setting.
- Flow estimate
- The estimate uses the lowest certified flow among the listed models. It is about 3.0 gal/min at a 70°F rise.
Flow limits
- The estimate excludes the flow needed to turn the heater on, heat lost in pipes, and installation.
- Cold water from a well or long pipe run can differ from the temperature you enter.
- Without a stated flow limit, estimates for warmer water may exceed the heater’s actual flow.
Product history
CO-Z JSD-24 left the DOE listing between Oct 2, 2026 and Oct 17, 2026.
CO-Z JSD-24 was in the DOE listing by Oct 1, 2026.
Certified figures by listed model
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|
| JSD-24 | 0.83 | 3.1 | 83% | Low |
UEF is the uniform energy factor. A dash means the model has no such figure.
At a 67°F rise, its flow in the test is 3.1 gallons per minute.
In tests, 83% of the energy went to hot water, so its UEF is 0.83. The daily hot water use in the test, called its draw pattern, was low. Of the energy it spends heating water, 83% ends up in it (its recovery efficiency).
It may qualify for one rebate program if it meets their other terms.
Rebates
| Program | State | Status | Program page |
|---|---|---|---|
| SoCalGas High-Efficiency or ENERGY STAR Certified Natural Gas Tankless Water Heaters rebate | CA | May qualify if it meets the other terms | Its own page |
Programs change their terms. Check the program's own page before you buy.
Not covered
- Advertised figures. We have none on file for this model.