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Ruud XE50T12CS55U1

Ruud XE50T12CS55U1 is in the DOE listing as of Oct 19, 2026.

  • Electric storage water heater
  • 5 listed models

ENERGY STAR certification does not cover this type of water heater.

Its figures are also listed under Rheem XE50M12CS55U1.

Storage volume
45gallons
UEF
0.92Uniform energy factor
First-hour rating
63gallonsHot water in the first hour
See it among every electric storage model

Advertised and certified figures

Ruud XE50T12CS55U1: advertised and certified
Ruud XE50T12CS55U1: advertised and certified Size: advertised 50 gal, certified 45 gal (advertised nominal size, certified storage volume). Size: advertised 45 gal, certified 45 gal (certified storage volume). UEF: advertised 0.92, certified 0.92. First-hour rating: advertised 63 gal, certified 63 gal. Size · advertised nominal size, certified storage volume Advertised 50 gal Certified 45 gal Size · certified storage volume Advertised 45 gal Certified 45 gal UEF Advertised 0.92 Certified 0.92 First-hour rating Advertised 63 gal Certified 63 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 50 gal, nominal size 45 gal storage volume Ruud Read Oct 5, 2026
Size 45 gal 45 gal storage volume Ruud Read Oct 5, 2026
UEF 0.92 0.92 Ruud Read Oct 5, 2026
First-hour rating 63 gal 63 gal Ruud Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
PRO+E50 T2 RU CG450.926398%Medium
PRO+E50 T2 RU92 CL450.926398%Medium
PROE50 T2 RU CG450.926398%Medium
PROUE50 T2 RU CG450.926398%Medium
PROUE50 T2 RU92 CS450.926398%Medium

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

It holds 45 gallons in the test, 5 gallons less than its 50-gallon sold size. Over one hour from a full tank, it gave 63 gallons in the test (its first-hour rating). That is 18 gallons more than its tank holds, since it reheats during the hour. In the first hour, 99 of the 477 electric storage models give more hot water. Among electric storage models, the median first-hour rating is 55 gallons.

In tests, 92% of the energy it uses ends up as hot water (UEF 0.92). In the test, daily hot water use was set to medium (its draw pattern). Its UEF is lower than that of 81 of the 297 electric storage models with its draw pattern. On its draw pattern, its UEF is also the median electric storage UEF. The water took in 98% of the energy used to reheat it (its recovery efficiency).

A tag or quote may show any of its 5 model numbers. There are 12 more basic models with the same test figures. Between them, those basic models carry 6 other brand names. For the full group, see the Rheem XE50M12CS55U1 page.

Also listed as

They carry every figure in the table above.

Updated Oct 19, 2026 · Methodology

Not covered

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