AO Smith Vertex Water Heater

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AO Smith Vertex water heaters are state-of-the-art products, featuring a fully-condensing design with incredible 96% thermal efficiency. Vertex models are tank-type units using natural gas and propane, built for homes with high hot water demand due to its high capacity characteristics and continuous supply of hot water.

AO Smith Vertex family of gas water heaters is the most advanced and ultra efficient series of tank-type heaters not only from this manufacturer but in the whole industry.

An amazing energy efficiency of 96% is not only outperforming similar models, but is much better than today's popular on-demand or tankless type.

Models and Features

The Vertex family of ultra-efficient water heaters is designed in two sizes; 50-gal and 75-gal and with the two venting options; power vent and power direct vent, all utilizing natural and propane gas.

AO Smith Vertex GPHE-50 is the only model that comes with the power vent option and lower 76,000 Btu power, while the Vertex 100 which includes GDHE-50 and GDHE-75 models utilize the power direct vent option, have the higher power of 100,000 Btus, and utilizing both natural and LP gas. Another significant difference is that Vertex 100 series uses the ultra-low NOx blower, which greatly reduces the greenhouse gases.

Comparing Technical Data

Capacity 50 75 50
76,000 100,000 100,000
Water Flow
92 129 129
90% 96% 96%
Power Vent Power Direct Vent Power Direct Vent
Gas type Natural Natural
Approx. dimensions
68x16x27 65x28x28 67x22x22

Easy installation

AO Smith Vertex GPHE-50 and GDHE-50 are easy to install as their size is close to the size of a standard 50 gallon water heater, and the gas and water connections are 3/4 and 1".

High efficiency

What makes the Vertex water heaters ultra efficient is the outstanding heat transfer with specifically designed helical coil heat exchanger, located inside the tank and completely surrounded by water, providing higher contact surface than standard straight flue tubes.

This is what helps these water heaters to have 90% and 96% thermal efficiency saving you even more money than standard type Energy Star models.

Advanced gas control and clean combustion

All units are equipped with the advanced electronics such as the Intelli-Gas control valve which ensures more precision and simple problem diagnostics. On the other side, the Green-Choice gas burner provides significant emission of NOx gases.

Recirculation capability

Hot and cold re-circulating taps allows both models not only for water heating, but space heating and radiant floor heating and for systems that require a re-circulating hot water loop.

Quality glass lining

All Vertex models are fully protected from the agggresive water action, mainly because of the quality glass lining and two anode system.

Commercial grade glass lining, PermaGlas Ultra Coat, protects not only the interior of the metal tank, but inside and outside of the heat exchanger.

Video about AO Smith Vertex features and benefits

emergency plumber

Power-Vent - Vertex GPHE-50 Review

ao smith vertex 50

Vertex is a 50-gallon power vent gas water heater with 90 % thermal efficiency and since it provides over 3 gallons of hot water per minute it is ideal for long showers and tons of dishes.

AO Smith Vertex GPHE-50 is a power vent unit that is using PVC pipe for venting, through the outside wall and by combining vertical and horizontal option, it has potential lengths of 128 ft or 42 m.

Green Choice is the patented eco-friendly gas burner that produces less greenhouse gases than a standard gas burner. Gas input power is 76,000 BTU per hour and the first-hour delivery rate is great 127 gallons.

Intelli-Vent gas control system is equipped with a hot surface igniter, there is no standing pilot light, and advanced electronics allow precise hot water temperature control and system diagnostics, which is great for troubleshooting and repair.

User reviews. Based on the online reviews, users are pretty impressed with the Vertex GPHE-50. They say that the unit is performing great, heats the water fast, the energy efficiency is high and the operating cost are much lower; up to 30% when comparing to standard gas water heaters. They are pleased with the 30% tax rebate, but not happy with the initial cost. Review are mixed when talking about the noise level.

Power Direct Vent - Vertex 100 GDHE-50 Review

ao smith water heater vertex

AO Smith GDHE-50-NG Vertex 100 is designed as a condensing water heater and because of its great characteristics this 50-gallon model performs as the 75-gallon size atmospheric unit

AO Smith Vertex GDHE-50 is a power direct vent gas water heater with fabulous 96% thermal efficiency and great delivery rate of 4 gallons of hot water.

This water heating system allows up to 128 ft or 42 m venting, using PVC, ABS, and CPVC pipes, vented either vertically through the roof, or horizontally through the wall. Concentric vent kit is also available (one pipe inside the other), where one pipe is used for air intake and the other for venting gases out.

In the front of the Vertex GDHE-50 you can see a large LCD display for temperature control and system diagnostics.

Its specially design Eco friendly and low NOx gas burner, Green Choice, provides an amazing 100 000 BTU per hour and 164 gallons first hour delivery.

Since Vertex GDHE-50 is the condensing water heating unit a condensate is produced in the venting system, so the vent pipe should be sloped downward and away from the blower.

User reviews. Based on the online reviews AO Smith Vertex 100 or GDHE-50-NG is very powerful and reliable unit that definitely meets the expectations. Some users are using Vertex 100 for water heating only while other for both hot water and home heating, such as radiant floor heating. The installation is easy, and they say that controls and menu are user friendly. For some the energy bill was lower so it can pay off in a year.

Buying a Vertex

If planning to buy AO Smith Vertex, the price is higher than conventional type... it is around $1500, and the place to buy it is from Amazon.

(Pictures are courtesy of AO Smith)