Vesta VX 9
Vesta VX 9 is in the DOE listing as of Oct 26, 2026 and is in the ENERGY STAR list as of Oct 26, 2026.
It has a certified UEF of 0.96 and a certified flow of 6.0 gal/min at a 67°F rise.
- Gas tankless water heater
- 1 listed model
Certified figures
- Flow at a 67°F rise
- 6.0gallons per minute
- UEF
- 0.96Uniform energy factor
Your fixtures at once
Change your hour and flowFlow where you live
A bigger rise from colder incoming water leaves the heater with 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 5.7 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
Vesta VX 9 was in the DOE listing by Oct 1, 2026.
Vesta VX 9 has a recorded ENERGY STAR market-availability date of Oct 1, 2025. It first appeared in the ENERGY STAR list between February 2026 and October 2026.
Certified figures by listed model
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|
| VX 9 | 0.96 | 6.0 | 96% | High |
UEF is the uniform energy factor. A dash means the model has no such figure.
ENERGY STAR certified models
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency |
|---|---|---|---|
| VX 9 | 0.96 | 6.0 | 96% |
At a 67°F rise, its flow in the test is 6.0 gallons per minute. The median flow among gas tankless models is 4.8 gallons per minute. Among 487 gas tankless models, 4 give more flow at a 67°F rise.
The single model number sold under it is ENERGY STAR certified. In tests, 96% of the energy went to hot water, so its UEF is 0.96. In the test, daily hot water use was set to high (its draw pattern). Its UEF is lower than that of 15 of the 399 gas tankless models with its draw pattern. For its type and draw pattern, the UEF runs from 0.81 to 0.98. When it runs, 96% of the energy it uses reaches the water (its recovery efficiency).
There is one more basic model with the same test figures.
It may qualify for 6 rebate programs. It may qualify for 2 more if it meets terms its figures do not show.
Also listed as
They carry every figure in the table above.
Rebates
| Program | State | Status | Program page |
|---|---|---|---|
| SoCalGas High-Efficiency or ENERGY STAR Certified Natural Gas Tankless Water Heaters rebate | CA | May qualify | Its own page |
| Colorado Springs Utilities Water heater rebate (gas storage, gas tankless) | CO | May qualify | Its own page |
| Nicor Gas Energy Efficiency Rebates for Your Home (gas tankless) | IL | May qualify if it meets the other terms | Its own page |
| DTE Energy Water Heaters (gas storage, gas tankless) | MI | May qualify | Its own page |
| Xcel Energy MINNESOTA RESIDENTIAL ENERGY EFFICIENCY PROGRAMS (gas storage, gas tankless) | MN | May qualify | Its own page |
| PSE&G Tankless Water Heaters | NJ | May qualify | Its own page |
| Energy Trust of Oregon Residential Incentives | OR, WA | May qualify | Its own page |
| Focus on Energy (gas tankless) | WI | May qualify if it meets the other terms | Its own page |
Programs change their terms. Check the program's own page before you buy.
- Every Vesta basic model
- Every gas tankless water heater certified at 6.0 gallons per minute or more
- Every gas tankless water heater
- The most-searched gas tankless models side by side
Not covered
- Advertised figures. We have none on file for this model.