DoesTheMath

FRIEDRICH PROG40-40N RH67 PDV vs Richmond PRO+G40-38U RH67 PD*: which uses less energy?

At the medium draw pattern the Richmond PRO+G40-38U RH67 PD* uses 173 therms a year and the FRIEDRICH PROG40-40N RH67 PDV 176 — 3 therms (2%) less, about 27 therms over ten years. Both are filed as a gas tank, 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 tank at the medium draw pattern.

Filed and computed figures
FRIEDRICH PROG40-40N RH67 PDV Richmond PRO+G40-38U RH67 PD*
UEF (Uniform Energy Factor) 0.63 0.64 (better)
Energy use per year (therms) 176 173 (better)
First hour rating (gal) 67 67
Rated storage volume (gal) 38 38
Installed cost range $1,585–$2,613 $1,643–$2,763
ENERGY STAR certified not matched not matched
DOE CCD · 2026-09-19

What it costs to run

FRIEDRICH PROG40-40N RH67 PDV: 176 therms a year Richmond PRO+G40-38U RH67 PD*: 173 therms a year

FRIEDRICH PROG40-40N RH67 PDV — 176 therms a year Richmond PRO+G40-38U RH67 PD* — 173 therms a year

Richmond PRO+G40-38U RH67 PD* is 3 therms a year lower than FRIEDRICH PROG40-40N RH67 PDV.

DOE CCD · 2026-09-19

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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 Richmond PRO+G40-38U RH67 PD* if running cost matters most: it uses 3 therms less a year on the same test.
  • Pick the FRIEDRICH PROG40-40N RH67 PDV if it is the one you can get installed sooner or for less — on the filed figures it has no advantage over the Richmond PRO+G40-38U RH67 PD*.
  • Neither if your household's busiest hour needs more than 67 gallons of hot water — neither lists more. Check whether a 40-gallon heater is enough.

Each model on its own

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