A. O. Smith PG10 34 100 2*V 2**

A. O. Smith PG10 34 100 2*V 2** is in the DOE listing as of Oct 26, 2026 and is in the ENERGY STAR list as of Oct 26, 2026.

It has a labeled size of 34 gallons, a certified storage volume of 33 gallons, a certified UEF of 0.90, and a certified first-hour rating of 170 gallons of hot water.

Its advertised UEF of 0.90 from A. O. Smith matches the certified 0.90 (Read Oct 5, 2026).

Gas storage water heater
1 listed model

Storage volume: 33gallons
UEF: 0.90Uniform energy factor
First-hour rating: 170gallonsHot water in the first hour

Advertised and certified figures

A. O. Smith PG10 34 100 2*V 2**: advertised and certified

A. O. Smith PG10 34 100 2*V 2**: advertised figures, where and when read
Figure	Advertised	Certified	Advertiser	Read
Size	34 gal, nominal size	33 gal storage volume	A. O. Smith	Read Oct 5, 2026
Size	33 gal	33 gal storage volume	A. O. Smith	Read Oct 5, 2026
UEF	0.90	0.90	A. O. Smith	Read Oct 5, 2026
First-hour rating	170 gal	170 gal	A. O. Smith	Read Oct 5, 2026

Certified figures by listed model

A. O. Smith PG10 34 100 2*V 2**: certified figures by listed model
Model number	Storage volume (gal)	UEF	First-hour rating (gal)	Recovery efficiency	Draw pattern
GSP-100 2**	33	0.90	170	95%	—

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

ENERGY STAR certified models

A. O. Smith PG10 34 100 2*V 2**: ENERGY STAR certified models
Model number	Storage volume (gal)	UEF	First-hour rating (gal)	Recovery efficiency
GSP-100 2**	33	0.90	170	95%

It holds 33 gallons in the test, 1 gallon less than its 34-gallon sold size. It delivers 170 gallons of hot water in the test's first hour. Its tank holds 33 gallons, so reheating adds 137 gallons during the first hour. In the first hour, 7 of the 763 gas storage models give more hot water. Among gas storage models, the median first-hour rating is 78 gallons.

It is ENERGY STAR certified under its single model number. In the test, 10% of its energy does not reach the hot water (UEF 0.90). When it reheats water in the test, 95% of the energy it uses ends up in the water.

There are 3 more basic models with the same test figures. Of those, one or more are under the American, Lochinvar, and State brands.

It may qualify for 3 rebate programs. Another one rebate program may accept it if it meets their other terms.

Also listed as

They carry every figure in the table above.

Rebates

A. O. Smith PG10 34 100 2*V 2**: rebate programs
Program	State	Status	Program page
Colorado Springs Utilities Water heater rebate (gas storage, gas tankless)	CO	May qualify	Its own page
Nicor Gas Energy Efficiency Rebates for Your Home (gas storage)	IL	May qualify if it meets the other terms	Its own page
DTE Energy Water Heaters (gas storage, gas tankless)	MI	May qualify	Its own page
Avista Home and small commercial: HVAC and water heating incentives (gas storage)	WA	May qualify	Its own page

Programs change their terms. Check the program's own page before you buy.

Updated Oct 26, 2026 · Methodology

Not covered

Changes to an advertised figure after the date beside it.