DoesTheMath

LOCHINVAR T-H3J-DV-N 1** vs VESTA VRP-PLUS-150: which uses less energy?

At the high draw pattern the VESTA VRP-PLUS-150 uses 178 therms a year and the LOCHINVAR T-H3J-DV-N 1** 180 — 2 therms (1%) less, about 19 therms over ten years. Both are filed as a gas tankless unit, so the comparison holds. Enter your ZIP below to price the difference.

Side by side

Compared within one class only: models filed as a gas tankless unit at the high draw pattern.

Filed and computed figures
LOCHINVAR T-H3J-DV-N 1** VESTA VRP-PLUS-150
UEF (Uniform Energy Factor) 0.94 0.95 (better)
Energy use per year (therms) 180 178 (better)
Max flow (GPM) 4.7 4.7
Installed cost range $2,311–$3,350 $2,358–$3,405
ENERGY STAR certified not matched yes
On the market since not filed 2023-10-16
DOE CCD · 2026-09-19

What it costs to run

LOCHINVAR T-H3J-DV-N 1**: 180 therms a year VESTA VRP-PLUS-150: 178 therms a year

LOCHINVAR T-H3J-DV-N 1** — 180 therms a year VESTA VRP-PLUS-150 — 178 therms a year

VESTA VRP-PLUS-150 is 2 therms a year lower than LOCHINVAR T-H3J-DV-N 1**.

DOE CCD · 2026-09-19

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Enter your ZIP to price both units on the same rate where you live.

Reliability

Not published: Reliability, failure rates and each model’s actual warranty term.

The registries these figures come from certify energy performance under a federal test; none of them records how long a unit lasts or how often it fails, so this page does not rank the two on reliability.

What is here instead:

  • The filed efficiency, capacity and tank size of both models, side by side below.
  • The actual warranty term is printed in each model’s documentation, not in any registry.

Which should you pick?

  • Pick the VESTA VRP-PLUS-150 if running cost matters most: it uses 2 therms less a year on the same test.
  • Pick the LOCHINVAR T-H3J-DV-N 1** if it is the one you can get installed sooner or for less — on the filed figures it has no advantage over the VESTA VRP-PLUS-150.
  • Neither if you need more than 4.7 GPM at the same time — neither unit lists more. Check how to size a tankless unit by GPM.

Each model on its own

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