AO Smith Power Vent Water Heaters

Reviews  | Submit a Review

Review of the AO Smith power vent water heaters from Vertex and ProMax series, including high efficiency and low NOx models.

AO Smith manufacturer offers over twenty tank-type, power vent gas water heaters that utilize the metal tank with the capacities from 40 to 75 gallons, and divided in two sizes: short and tall. All the models are coming from two groups: ultra-efficient Vertex and ProMax, both powered by natural and propane gas.

Vertex

AO Smith Vertex Power Vent

Vertex is the only super efficient model from all AO Smith power vent water heaters that is capable of providing a thermal efficiency of over 90%.

Vertex is equipped with the 50-gallon tank and can deliver over 92 gallons of hot water in one hour and water flow of 3 gallons per minute, continuously.

The environment-friendly and top-fired gas burner helps the water heater in reducing the emission of NOx gases and together with the spiral heat exchanger increases the efficiency which saves the energy and money.

The advanced electronics allows better and precise control of the water temperature and makes the troubleshooting easier.

ProMax

ProMax is the widest group of all power vent gas water heaters whose energy factor is in the range from 0.65 to over 0.7, making many of them Energy Star compliant (EF has to be higher than 0.67). ProMax models are available in 40, 50 and 75-gallon sizes and are grouped in three categories:


ProMax Power Vent

ao smith promax power vent

ProMax Power Vent Higher EF are high efficiency water heaters that are design to maximize the efficiency and performance. As the Energy Star approved, ProMax water heaters save money and time, while protecting the environment with the low NOx gas combustion.

The main features include the DynaClean II system and its specially designed dip tube for the optimized water heating and protection against the sediment build-up inside the metal tank.

The most applied pilot light has been replaced by the hot surface ignitor, which is not only more reliable feature but saves more energy.

The metal tank is protected with the Blue Diamond glass coating and factory installed anode rod.

Power vent design brings the great versatility as its vent pipes can be installed horizontally through the outside wall and vertically through the roof. Such an enhanced flexibility brings you more options during the installation especially with the use of the 3-position rotatable blower outlet. The pipe can use various materials: PVC, ABS or PP and can run up to 180 feet, making them perfect even in homes with the limited space.

emergency plumber

The advanced gas control valve increases the accuracy in temperature control and makes diagnostic easier. The protected sensor and air intake snorkel enhance the safety since the combined system prevents the accidental ignition of the flammable vapors.

Models
---
Specs
GPVL 40 GPVT 40 GPVL 50 GPVT 50 GPVX 50L GPVX 75L
Capacity (Gal) 40 40 50 50 50 75
Gas Input
(BTUs)
40,000 50,000 40,000 50,000 62,000 72,000
FHR
(GPH)
73 90 90 96 110 155
Energy Factor
EF
0.70 0.70 0.70 0.70 0.70 0.68
Recovery rate
(GPH)
44.7 55.9 44.7 55.9 69.3 80.4
Max. vent length
(ft)
180' 180' 180' 180' 125' 125'
Weight
(Lb
174 176 198 192 212 277

ProMax Ultra-Low NOx Power Vent

ao smith promax ultra low power vent

AO Smith power vent water heaters from Ultra-low series utilize the advanced burner system that combines the radiant heat and access air to increase the energy efficiency to 0.68, while providing the gas combustion with reduced amount of green-house gases.

The burner system uses the high quality materials and is more efficient and durable than standard type.

The Ultra low NOx water heaters are equipped with the Coregard anode rod and DynaClean dip tube for protection against corrosion and sediment build-up. Ultra low models utilize the FVIR system with the flame arrestor.


Models
---
Specs
GPNH 40 GPNH 50
Capacity (Gal) 40 50
Gas Input
(BTUs)
42,000 42,000
FHR
(GPH)
69 81
Energy Factor
EF
0.68 0.68
Recovery rate
(GPH)
42.6 42.6
Max. vent length
(ft)
120' 120'
Weight
(Lb
170 207

ProMax SL

ao smith power vent sl series

AO Smith power vent water heaters that are coming from the ProMax SL series are found in two sizes; 40- and 50-gallon, both designed for use in residential homes. Both models utilize the FVIR feature that protects the unit and the environment from accidental ignition of the flammable vapors.

ProMax SL water heaters are equipped with several top AO Smith features such as the intelli-vent gas control valve that uses the hot surface ignitor, advanced electronics for the accurate temperature control and diagnostics.

Side mounted gas connection allows easier installation while the recirculating taps provide combined space and potable water heating.

All the units from this group are FVIR compliant and the system includes the sealed combustion chamber, flame arrestor and flammable vapor sensor which shuts down the gas control valve and burner.



Models
---
Specifications
GPVT-40L GPVT-50L GPVX-50L GPS-75L
Capacity (Gal) 40 50 50 75
Gas Input
(BTUs)
50,000 50,000 62,500 80,000
FHR
(GPH)
80 83 114 N/A
Energy Factor
EF
0.65 0.65 0.65 N/A
Recovery rate
(GPH)
53 53 66 86
Max. vent length
(ft)
160' 160' 120' 100'
Weight
(Lb
166 186 186 245

All the models that comply with the Energy Star requirements, such as the High EF and Ultra low NOx series, provide more energy and money savings than the SL series, which doesn't comply. The above models are factory built to use natural gas, while propane models have the same specifications and warranty of 6 years.



(Pictures are courtesy of AO Smith)

water heaters