Vesta VX 9 is a gas tankless water heater from Vesta rated 6 GPM at a 0.96 UEF — 2 therms/yr certified use, 199k BTU/h input.
Efficiency
Uniform Energy Factor (UEF)
0.96
Annual gas use (natural gas)
2 therms/yr
Recovery efficiency
96 %
Annual propane use
2.19 gal/yr
General
Fuel
Natural Gas, Propane
Capacity
Max flow rate
6 GPM
Draw pattern
High
Minimum activation flow
0.5 GPM
Performance
Gas input rate
199 kBTU/h
Installation
Max current draw
5 A
Vent type
Direct Vent
Vent size
2
Smart features
Smart / connected capable
No
Dimensions
Width
18.1 in
Depth
14.7 in
Certification
ENERGY STAR certified
Yes
Real flow rate by climate
A tankless heater's usable flow depends on how far it must raise incoming water
temperature. Sustained hot-water flow of the Vesta VX 9 at common temperature
rises (a typical shower uses about 2 GPM of mixed water):
Temperature rise
Climate
Sustained flow
Simultaneous showers
45 °F
Warm climate (~75 °F groundwater)
6 GPM
3
55 °F
Mild climate (~65 °F groundwater)
6 GPM
3
70 °F
Cold climate (~50 °F groundwater)
5.5 GPM
2
77 °F
DOE test condition
5 GPM
2
Also sold as
The Vesta VX 9 is certified hardware that Vesta and its partner brands
publish under 2 names. The same specifications apply to every
variant:
Yes, the Vesta VX 9 holds a current ENERGY STAR certification for water heating efficiency (UEF 0.96).
How much does the Vesta VX 9 cost to run per year?
About $3 per year at national average energy rates, based on its certified annual energy use under the DOE test draw pattern. Your rate and usage change this figure.
What venting does the Vesta VX 9 use?
The Vesta VX 9 uses Direct Vent venting with 2 in vent connections. Matching the existing vent type is usually the cheapest replacement path.
Is the Vesta VX 9 a smart water heater?
No, the Vesta VX 9 is not connected-capable — it has no app connectivity or demand-response support.
