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Ruud XE55T12CS55U0

Ruud XE55T12CS55U0 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 XE55T12CS55U0.

Storage volume
55gallons
UEF
0.92Uniform energy factor
First-hour rating
74gallonsHot water in the first hour
See it among every electric storage model

Advertised and certified figures

Ruud XE55T12CS55U0: advertised and certified
Ruud XE55T12CS55U0: advertised and certified Size: advertised 55 gal, certified 55 gal (advertised nominal size, certified storage volume). Size: advertised 55 gal, certified 55 gal (certified storage volume). UEF: advertised 0.92, certified 0.92. First-hour rating: advertised 74 gal, certified 74 gal. Size · advertised nominal size, certified storage volume Advertised 55 gal Certified 55 gal Size · certified storage volume Advertised 55 gal Certified 55 gal UEF Advertised 0.92 Certified 0.92 First-hour rating Advertised 74 gal Certified 74 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 55 gal, nominal size 55 gal storage volume Ruud Read Oct 5, 2026
Size 55 gal 55 gal storage volume Ruud Read Oct 5, 2026
UEF 0.92 0.92 Ruud Read Oct 5, 2026
First-hour rating 74 gal 74 gal Ruud Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
PRO+E55 T2 RU CG550.927498%Medium
PRO+E55 T2 RU92 CL550.927498%Medium
PROE55 T2 RU CG550.927498%Medium
PROUE55 T2 RU CG550.927498%Medium
PROUE55 T2 RU92 CS550.927498%Medium

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

Sold as 55 gallons, it holds 55 gallons in the test. It delivers 74 gallons of hot water in the test's first hour. Its tank holds 55 gallons, so reheating adds 19 gallons during the first hour. Of 477 electric storage models, 23 give more hot water in the first hour. The median electric storage model gives 55 gallons in its first hour.

In tests, 92% of the energy went to hot water, so its UEF is 0.92. Its test ran at the medium level of daily hot water use. Of 297 electric storage models with the same draw pattern, 81 have a higher UEF. Its UEF is the median for its type and draw pattern. When it reheats water in the test, 98% of the energy it uses ends up in the water.

It is sold under 5 model numbers in all. All of its test figures are shared by 3 other basic models. Of those, one or more are under the Friedrich, Rheem, and Richmond brands. You can find the whole group on the page for the Rheem XE55T12CS55U0.

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.