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RELIANCE WATER HEATERS MHE6-40R-045D 1**

RELIANCE WATER HEATERS MHE6-40R-045D 1** is in the DOE listing as of Oct 19, 2026.

  • Electric storage water heater
  • 2 listed models

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

Its figures are also listed under A. O. Smith MHE6-40R-045D 1**.

Storage volume
36gallons
UEF
0.95Uniform energy factor
First-hour rating
54gallonsHot water in the first hour
See it among every electric storage model

Advertised and certified figures

RELIANCE WATER HEATERS MHE6-40R-045D 1**: advertised and certified
RELIANCE WATER HEATERS MHE6-40R-045D 1**: advertised and certified Size: advertised 40 gal, certified 36 gal (advertised nominal size, certified storage volume). Size: advertised 36 gal, certified 36 gal (certified storage volume). UEF: advertised 0.95, certified 0.95. First-hour rating: advertised 54 gal, certified 54 gal. Size · advertised nominal size, certified storage volume Advertised 40 gal Certified 36 gal Size · certified storage volume Advertised 36 gal Certified 36 gal UEF Advertised 0.95 Certified 0.95 First-hour rating Advertised 54 gal Certified 54 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 40 gal, nominal size 36 gal storage volume RELIANCE WATER HEATERS Read Oct 5, 2026
Size 36 gal 36 gal storage volume RELIANCE WATER HEATERS Read Oct 5, 2026
UEF 0.95 0.95 RELIANCE WATER HEATERS Read Oct 5, 2026
First-hour rating 54 gal 54 gal RELIANCE WATER HEATERS Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
6-40-EMHSDH 1**360.955498%Medium
6-40-SHMSE 1**360.955498%Medium

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

It holds 36 gallons in the test, 4 gallons less than its 40-gallon sold size. It delivers 54 gallons of hot water in the test's first hour. That is 18 gallons more than its tank holds, since it reheats during the hour. Among 477 electric storage models, 239 have a higher first-hour rating. The median electric storage model gives 55 gallons in its first hour.

In tests, 95% of the energy it uses ends up as hot water (UEF 0.95). Its test simulated a day of medium hot water use (its draw pattern). No other electric storage model among the 297 on its draw pattern has a higher UEF. For its type and draw pattern, the UEF runs from 0.91 to 0.95. Of the energy spent to reheat water, 98% goes into it (its recovery efficiency).

It is sold as 6-40-EMHSDH 1** and 6-40-SHMSE 1**. Its test figures match those of 3 other basic models. Of those, one or more are under the A. O. Smith, American, and State brands. You can find the whole group on the page for the A. O. Smith MHE6-40R-045D 1**.

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.