Hot Water List

Vesta VTP-199

Vesta VTP-199 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

Flow 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 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 VTP-199 was in the DOE listing by Oct 1, 2026.

Vesta VTP-199 was included in the recall notice “VESTA.DS Recalls VST Brand Tankless Water Heaters Due to Carbon Monoxide (CO) Poisoning Hazard and Risk of Serious Injury and Death” on Oct 16, 2025 (recall date).

Vesta VTP-199 has a recorded ENERGY STAR market-availability date of Oct 16, 2023. It first appeared in the ENERGY STAR list between October 2025 and February 2026.

Certified figures by listed model

Vesta VTP-199: certified figures by listed model
Model numberUEFFlow at a 67°F rise (gal/min)Recovery efficiencyDraw pattern
VTP-1990.966.098%High

UEF is the uniform energy factor. A dash means the model has no such figure.

ENERGY STAR certified models

Vesta VTP-199: ENERGY STAR certified models
Model numberUEFFlow at a 67°F rise (gal/min)Recovery efficiency
VTP-1990.966.098%

It heats 6.0 gallons per minute of water by 67°F in the test. The gas tankless type has a median flow of 4.8 gallons per minute. Of 487 gas tankless models, 4 have a higher flow than this one.

Its single model number, VTP-199, is ENERGY STAR certified. In tests, 96% of the energy went to hot water, so its UEF is 0.96. Its test simulated a day of high hot water use (its draw pattern). Among 399 gas tankless models on its draw pattern, 15 have a higher UEF. For its type and draw pattern, the median UEF is 0.93. Of the energy it spends heating water, 98% ends up in it (its recovery efficiency).

In 7 states, 6 rebate programs may accept it. It may qualify for 2 more if it meets terms its figures do not show.

Rebates

Programs change their terms. Check the program's own page before you buy.

Updated Oct 26, 2026 · Methodology

Not covered

  • Advertised figures. We have none on file for this model.