Water heaters are an important part of every household. Lack of warm water in winters makes every little chore difficult.

And even though they’re a basic requirement, nearly 21% of your home’s total energy usage is consumed by water heaters. Advanced technologies in modern heaters can reduce your energy usage dramatically and more energy-efficient options are introduced in the market every day.

One such company is AO Smith, which manufactures water heaters evaluated by experts and featuring the latest technologies that can provide a number of benefits.

Why Choose AO Smith Water Heater?

Here are a few key features found across many designs by AO Smith, each of these carrying great advantages!

DynaClean System

This is a self-cleaning system, effectively reducing the lime and sediment build-up to boost the performance of the water heaters. The system is a standard feature across all Promax models.

Green-Choice Gas Burners

These eco-friendly burners lower the nitrogen dioxide and other common pollutant emissions from the heater.

CoreGuard Anodes

The anode rod can be manufactured from either aluminium or magnesium with a core of stainless steel, for the protection of the tank from aggressive water pressure. It’s found in the Promax and Conservationist series.

Blue-Diamond Coating

This strong coating protects the inner portion of the water heater from corrosion.

Permaglass Coating

This is a well-known, efficient and long-lasting coating that protects the water heater from corrosion.

Flame Arrestor

It’s made from Cordierite, a fireproof material that spreads air evenly to the gas burner inside the combustion chamber.

9 Best AO Smith Water Heaters:

Here’s a list of the most efficient water heaters by AO Smith!

1. AO Smith (BTH-150) Tank-Type Water Heater

Features-

• LCD Display.
• Intelligent Control System.
• Vent Size is 3
• Permaglass ultra coating/lining for longer lifespan.
• Powered anodes which offers tank protection for longer periods, even under a rough water quality.
• Submerged combustion chambers that comprises of a helical coil for heat exchange.
• 100 Gal tank volume.

Pros-

• Doesn’t run out of water quickly.
• Cuts on energy bills by 30-50%
• Smaller in size, can easily be fit or hung on the wall for more floor space.

Cons-

• Installation may take longer.
• 3-8 seconds lag time for lighting up burners and heating to achieve set temperature.

2. AO Smith ENS-50 ProMax Short Electric Water Heater

Features-

• 52 Gal tank.
• Boasts 3-inch thick foam insulation that traps atmospheric heat.
• CFCs-free.
• DynaClean system for sediment clearing and effective heating.
• 4500W Phoenix Incoloy low-density steel material.
• Superior corrosion resistance thanks to Blue Diamond glass lining.

Pros-

• Low cost of operation during milder temperatures.
• Qualified for rebates and tax incentives.
• Frequent cycling from the heater’s faucets is eliminated.

Cons-

• Cost is high in comparison to other water heaters.
• Air filters need to be cleaned every now and then to ensure proper working efficiency.

3. AO Smith GPVL-50 ProMax Electric Water Heater

Features-

• 60 Gal tank.
• Voltex operation offers the same quantity of heated water at less operating cost in comparison to other electric water heaters. It’s beneficial for users of a whole house generator.
• Permaglass coating is present that increases the tank’s lifespan and saves it from being corroded by bad quality water.
• Features 3 operating modes; efficiency, electric and hybrid. You can pick the mode matching your heating requirements and environmental conditions.
• Heating elements last longer, 240V/4500W upper and 240V/2000W lower helps in heating water whenever in hybrid or a conventional electric model.
• The tank has a higher storage capacity that enables heat pump to work more effectively.
• The operating costs are saved due to efficient heat pump, saving more money than lower capacity units.

Pros-

• Reduces water waste.
• Increases the efficiency of actual water heater.
• Cuts the heating period of water dramatically.

Cons-

• Needs a 110V or 220V circuit with high Ampere, which usually needs to be installed separately.
• Costly when buying.

4. AO Smith EJCS-20 Residential Electric Water Heater

Features-

• 20 Gal tank.
• A compact design.
• Side-mounted plumbing.
• Installation by the electrical connections counter made possible by its design.
• Features a drain valve made of brass, which is both durable and tamper-proof.

Pros-

• Very reliable, even after decades.
• Heating time for water is really short.
• Improved efficiency of the main heater.

Cons-

• Operation can be costly.
• Smaller lifespan due to short tank life.

5. AO Smith PNS-50 ProMax

Features-

• 50 Gal tank.
• Blue Diamond coating and high quality glass lining that offer strong corrosion resistance.
• Electronic gas valve is self-powered and utilizes thermopile for creating power required for operation of gas control. Doesn’t need any external power supply.
• DynaClean dip tube made of PEX polymer reduces lime and sediment build-up in the heater while promoting hot water output.
• Internal microprocessor is built upon enhanced operating parameters and tighter differentials for precise sensing and faster response.
• Model meets all regulations formed by NAECA.

Pros-

• Consumes less energy.
• Operation cost is low.
• Efficient and reliable to use.

Cons-

• Taller heat pump which makes it harder to fit in small spaces.

6. AO Smith ENT-50 ProMax High Efficiency Tall Electric Water Heater

Features-

• Permaglass coating prevents corrosion in the tank and maximizes the life of heater.
• DynaClean diffuser tube made with sturdy cross-linked polymer reduces sediment build-up and boosts hot water output.
• CoreGuard anode made from aluminium with a core of stainless steel protects against corrosion and lasts longer, as compared to ordinary anodes.
• The height is 60 inches.
• Drain valve, made from brass is tamper-resistant and durable.
• National Appliance Energy Conservation Act approved.
• 52 Gal tank.

Pros-

• Provides reliable and accurate performance.
• Temperature control is strong.
• Hot water recovers swiftly.

Cons-

• Hot water quantity is less.
• The model is harder to fit in some spaces due to the tall heat pump.

7. AO Smith GDV-50 Residential Natural Gas Water Heater

Features-

• 45 Gal tank.
• Uses external air during combustion.
• CSA certified & ASME rated
• Vent size is 3-6
• DynaClean system is present to stop lime build-up.
• FVIR compliant.

Pros-

• Efficient and energy-saving.
• Hot water never finishes.
• Easy installation process.

Cons-

• Newer models can cost twice or thrice more.
• May require venting reconfiguration.
• A gas line is needed.

8. AO Smith BTR-200 Tank Type Water Heater

Features-

• Electronic Ignition
• CSA standard model, ASME rated.
• Vent Size is 6
• 100 Gal tank.
• Exceeds thermal efficiency.

Pros-

• Buying cost is cheap.
• Simple installation and operation.
• Doesn’t bear fans and pumps that burn out.

Cons-

• Less efficient than other options.
• Operating is more expensive.
• Needs to be flushed with special chemicals every 10-12 months for maintenance of efficiency.

9. AO Smith GPVT-40 Residential Natural Gas Water Heater

Features-

• Green-Choice Gas Burner decreases nitrogen dioxide and pollutant emissions with it’s a quality patented design.
• The Piezo igniter can be lighted by simply pushing a button.
• CoreGuard anode is made of magnesium, saving the tank from strong action of water.
• DynaClean system with a diffuser dip tube prepared from cross-linked PEX polymer reduces sediment build-up and accelerating the heated water output.
• 41 Gal tank.

Pros-

• Very efficient and consumes less energy.
• Heat loss during standby mode is minimum.
• Prevents water wastage.

Cons-

• Needs proper space for installation.
• A complex design that can be costly to install.