waterheaterspecs

Lochinvar, LLC

Lochinvar, LLC is the ENERGY STAR partner of record for 26 certified model numbers in 5 rating sets, all residential-duty commercial gas storage, under 5 brand names. Four of this partner’s sets hold the four lowest first-hour ratings of the 15 residential-duty commercial gas storage sets, from 100 gal to 130 gal. None of them carries the Lochinvar name: they are listed as A. O. Smith, American, GSW, Reliance and State. The two sets with the lowest UEF among those 15 sets, 0.86, are both listed here.

Certified models as of October 27, 2026 · Open these sets in the Heater finder

First-hour rating against rated volume, this partner against the other residential-duty commercial sets

Listed hereOther sets of the same type

First-hour rating, gal

First-hour rating against rated volume, this partner against the other residential-duty commercial sets8012016020030405060708090100110120Rated volume, gal2×3×American PG10 34 100 2V 2HTP PH100-119HTP PH100-55HTP PH100-80HTP PH76-50HTP PH76-60HTP PH76-80Rheem ECE G50-100U CN HE EC3Rheem ECE G50-76U CN HE EC3Rheem PROPG75-100P RH HE EC3GSW 6G5076NVC 1A. O. Smith GDHE-50 3A. O. Smith GDHE-75 3A. O. Smith HDHE-50 4A. O. Smith HDHE-75 4
First-hour rating against rated volume, this partner against the other residential-duty commercial sets80120160200306090120Rated volume, galAmerican PG10 34 100 2V 2HTP PH100-119HTP PH100-55HTP PH100-80HTP PH76-50HTP PH76-60HTP PH76-80Rheem ECE G50-100U CN HE EC3Rheem ECE G50-76U CN HE EC3Rheem PROPG75-100P RH HE EC3GSW 6G5076NVC 1A. O. Smith GDHE-50 3A. O. Smith GDHE-75 3A. O. Smith HDHE-50 4A. O. Smith HDHE-75 4
Each circle is one rating set; filled circles grow with the number of model numbers. Dashed lines mark first-hour output of 2× and 3× the rated volume.

Every rating set

Sorted by first-hour rating.

Gas storage rating sets
Rating setRated volumeFirst-hour ratingUEFGas useGas inputFuel
Gas storage, residential-duty commercial5 of 15 sets, all high draw
A. O. Smith HDHE-75 4Also listed as American, GSW, Reliance, State
Show 5 model numbers
  • A. O. Smith HDHE-75 4**
  • American VG8275T100*V
  • GSW 8G-75100*PDV-H06* 4**
  • Reliance 8-75-*TPDT 4**
  • State GP-8-75-*TPDT 4**
74 gal150 gal0.86197 therms/yr100,000 Btu/hnatural gas or propane
A. O. Smith GDHE-75 3Also listed as American, GSW, Reliance, State
Show 5 model numbers
  • A. O. Smith GDHE-75 3**
  • American VG6275T100*V 3**
  • GSW 6G75100*PDVH0* 3**
  • Reliance 6-75- *TPDT 3**
  • State GP6-75- *TPDT 3**
74 gal130 gal0.86197 therms/yr100,000 Btu/hnatural gas or propane
GSW 6G5076NVC 1Also listed as A. O. Smith, American, Reliance, State
Show 6 model numbers
  • A. O. Smith GPHE-50 1**
  • American VG6250T76NV 1**
  • GSW 6G5076NVC 1**, 6G5076NVC02 1**
  • Reliance 6-50-YTVIT 1**
  • State GP6-50-YTVIT 1**
48 gal119 gal0.88192 therms/yr76,000 Btu/hnatural gas only
A. O. Smith HDHE-50 4Also listed as American, GSW, Reliance, State
Show 5 model numbers
  • A. O. Smith HDHE-50 4**
  • American VG8250T100*V
  • GSW 8G-50100*PDV-H06* 4**
  • Reliance 8-50-*TPDT 4**
  • State GP-8-50-*TPDT 4**
49 gal118 gal0.88192 therms/yr100,000 Btu/hnatural gas or propane
A. O. Smith GDHE-50 3Also listed as American, GSW, Reliance, State
Show 5 model numbers
  • A. O. Smith GDHE-50 3**
  • American VG6250T100*V 3**
  • GSW 6G50100*PDVH 3**
  • Reliance 6-50-*TPDT 3**
  • State GP6-50-*TPDT 3**
49 gal100 gal0.88192 therms/yr100,000 Btu/hnatural gas or propane

One rating, five brand names

6

model numbers here share every certified value of GSW 6G5076NVC 1: 48 gal rated, 119 gal first hour, UEF 0.88.

Why one rating set carries several brand names

Model numbers in that set, by brand

  • GSW2
  • A. O. Smith1
  • American1
  • Reliance1
  • State1

Fuel listing

Counted by model number. Separate natural-gas and propane versions of one heater usually carry their own model numbers.

Model numbers by brand

Each row is one set of certified values; each column is a brand name it is sold under. An asterisk in a model number stands for a variant character.

Model numbers by brand for each rating set
Rating setA. O. SmithAmericanGSWRelianceState
GSW 6G5076NVC 148 gal rated · 119 gal first hour · UEF 0.88GPHE-50 1**VG6250T76NV 1**6G5076NVC 1**, 6G5076NVC02 1**6-50-YTVIT 1**GP6-50-YTVIT 1**
A. O. Smith GDHE-50 349 gal rated · 100 gal first hour · UEF 0.88GDHE-50 3**VG6250T100*V 3**6G50100*PDVH 3**6-50-*TPDT 3**GP6-50-*TPDT 3**
A. O. Smith HDHE-50 449 gal rated · 118 gal first hour · UEF 0.88HDHE-50 4**VG8250T100*V8G-50100*PDV-H06* 4**8-50-*TPDT 4**GP-8-50-*TPDT 4**
A. O. Smith GDHE-75 374 gal rated · 130 gal first hour · UEF 0.86GDHE-75 3**VG6275T100*V 3**6G75100*PDVH0* 3**6-75- *TPDT 3**GP6-75- *TPDT 3**
A. O. Smith HDHE-75 474 gal rated · 150 gal first hour · UEF 0.86HDHE-75 4**VG8275T100*V8G-75100*PDV-H06* 4**8-75-*TPDT 4**GP-8-75-*TPDT 4**

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