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A. O. Smith GCRH-40 4**

A. O. Smith GCRH-40 4** is in the DOE listing as of Oct 26, 2026.

It has a labeled size of 40 gallons, a certified storage volume of 38 gallons, a certified UEF of 0.59, and a certified first-hour rating of 65 gallons of hot water.

Its advertised UEF of 0.66 from A. O. Smith differs from the certified 0.59 (Read Oct 5, 2026).

  • Gas storage water heater
  • 3 listed models

Not listed as ENERGY STAR certified on Oct 26, 2026.

Storage volume
38gallons
UEF
0.59Uniform energy factor
First-hour rating
65gallonsHot water in the first hour
See it among every gas storage model

Advertised and certified figures

A. O. Smith GCRH-40 4**: advertised and certified
A. O. Smith GCRH-40 4**: advertised and certified Size: advertised 40 gal, certified 38 gal (advertised nominal size, certified storage volume). Size: advertised 38 gal, certified 38 gal (certified storage volume). UEF: advertised 0.66, certified 0.59. UEF: advertised 0.61, certified 0.59 (advertised up to). Size · advertised nominal size, certified storage volume Advertised 40 gal Certified 38 gal Size · certified storage volume Advertised 38 gal Certified 38 gal UEF Advertised 0.66 Certified 0.59 UEF · advertised up to Advertised 0.61 Certified 0.59
FigureAdvertisedCertifiedAdvertiserRead
Size 40 gal, nominal size 38 gal storage volume A. O. Smith Read Oct 5, 2026
Size 38 gal 38 gal storage volume A. O. Smith Read Oct 5, 2026
UEF 0.66 0.59 A. O. Smith Read Oct 5, 2026
UEF up to 0.61 0.59 A. O. Smith Read Oct 5, 2026
First-hour rating 80 gal 65 gal A. O. Smith Read Oct 5, 2026
First-hour rating 65 gal 65 gal A. O. Smith Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
G6-T4035NVR 4**380.596580%Medium
GCRH-40 4**380.596580%Medium
XCRH-40 4**380.596580%Medium

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

It holds 38 gallons in the test, 2 gallons less than its 40-gallon sold size. It delivers 65 gallons of hot water in the test's first hour. Reheating lets it give 27 gallons beyond the 38 gallons in its tank. Among 763 gas storage models, 600 have a higher first-hour rating. The median gas storage model gives 78 gallons in its first hour.

On Oct 26, 2026, this heater was not listed as ENERGY STAR certified. In tests, 59% of the energy it uses ends up as hot water (UEF 0.59). In the test, daily hot water use was set to medium (its draw pattern). Its UEF is lower than that of 185 of the 288 gas storage models with its draw pattern. A UEF of 0.60 is the median for its type and draw pattern. The water took in 80% of the energy used to reheat it (its recovery efficiency).

It is the basic model for G6-T4035NVR 4**, GCRH-40 4**, and XCRH-40 4**. All of its test figures are shared by 5 other basic models. Each of them is listed under a different brand.

Also listed as

They carry every figure in the table above.

Updated Oct 26, 2026 · Methodology

Not covered

  • Changes to an advertised figure after the date beside it.