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A O Smith Condensing Tankless Water Heater Reviews Ato 520h

AO Smith Tankless H2o Heaters
Review & Buying Tips

Explore small and compact AO Smith tankless water heaters designed for on-demand water heating in residential and commercial applications without occupying the floor space.

What to look for and review of the best of AO Smith condensing water heaters, engineered to provide hot water in countless supply, with the high flow rates and ultimate efficiency. Cheque out the best models to buy.

Blazon and model review

AO Smith tankless water heaters are divided into three groups for residential and lite commercial use, all generally set to use natural gas and convert to liquid propane with the right conversion kit.

Several types and sizes are available, from the economy, such every bit non-condensing, to the advanced condensing models with the congenital-in recirculation pump, ultimate efficiency, and ultra-low NOx - all coming from the ProLine XE serial.

ATI (ATO) - 110 (U/C), 310 (U/C), 510 (U/C)

Tankless h2o heaters from these groups are the simplest of all tankless from AO Smith. As they are equipped with only 1 oestrus exchanger, these non-condensing units are available as indoor (ATI) with the power or ability straight vent, or outdoor (ATO) - ventless, too with the ultra-low NOx (U), and concentric vent (C) option.

The ATI-510 model is the all-time, likewise the largest non-condensing tankless model to cull equally information technology comes with a durable commercial-grade copper oestrus exchanger, high energy factor of 0.82, a maximum flow rate of 10 GPM, and adequacy to connect up to 4 units into ane system. The users mostly like its compact size, prissy appearance, reliable operation, and endless hot water, while the primary "outcome" is the longer look time than with the tank-type.

An even better model to purchase is ATI-510U, due to the ultra-low NOx emission - bang-up for environment-conscious users and integrated control. In addition to an Like shooting fish in a barrel-Link organization, the Multi-Link tin connect up to twenty units to operate as one system - delivering more ability and hot water.

ATI (ATO) - 140H, 240H, 340H, 540H and 540P

This serial consists of ultra-efficient and ultra-low NOx condensing tankless water heaters, where the free energy cistron is over 0.xc. Indoor models have the temperature controller built-in, while the outdoor model comes with the wall mount controller.

A model 540H is the largest and most powerful - one of the top models to purchase, and, equally the 510 series, is congenital for heavier hot water usage - 10 GPM water flow and capability to utilize an Easy-Link and Multi-Unit system.

Basic features

On-demand engineering

AO Smith tankless water heaters are designed for on-demand water heating at the point of service and for the whole firm use, supplying hot water to one or several applications simultaneously. Also, they are used for loftier demanding applications such equally to fill up the whirlpool tubs or simply supplementing primary storage tank-blazon water heaters.

High-quality components

The best AO Smith tankless h2o heaters accept loftier efficiency and condensing technology, using one or two rut exchangers.

The primary heat exchanger is fabricated of thick, commercial-class copper - difficult and durable, while the secondary is fabricated of corrosion-resistant, stainless steel for utilizing "already lost" rut from the flue gases. This way, the total efficiency is significantly increased where the energy gene is over 0.90.

For example, one of the best tankless models, the 540 series, utilizes a recirculation pump for fast, hot water commitment and has an free energy gene of high 0.93, meaning that only 7% of free energy is wasted. This is the largest tankless unit of measurement, and due to the flow rate of 10 GPM is recommended for homes with upwards to four showers.

Venting

AO Smith tankless water heaters built for indoor utilise come with a direct venting system and sealed combustion, so the water heater tin only accept the fresh air and vent the gases exterior, keeping the within air protected and untouched.

Non-condensing units use the category Iii stainless steel venting, while condensing models use cheaper PVC pipes as the exhaust gas temperature is lower. The tankless installation allows flexible venting, including a long vertical or horizontal run through the roof or walls.

The outdoor units are ventless and take corking advantages as the outdoor installation saves valuable indoor space, and whatsoever leak of the products of combustion or gas stays outside. A recommendation is to install the outdoor unit inside the recess box for protection from the elements, which is available as an optional accompaniment.

Water menses

AO Smith gas tankless water heaters are designed to provide hot h2o in continuous supply only when it is needed - on-need. These can provide enough hot water for several fixtures simultaneously, where the water menses of x GPM, equally found on the largest unit ATI-540H, is the maximum available.

Up to four units can be connected into ane organisation without purchasing whatsoever additional parts or accessories, or up to xx units connected into one organization with some modifications.

In the state of affairs with the high volume conditions (iv and more showers) found on heavy-duty water heaters, such as the series 510 and 540, AO Smith includes durable featherbed and flow adjustment valves to handle units with less stress.

If you are looking for a tankless h2o heater for one to three showers, small and medium-size homes, series 110, 140, 310, and 340 are recommended.

Electronics

Electronic ignition, temperature, and other heating processes inside the AO Smith tankless gas heaters are monitored by the electronic control board. This is what helps one unit to have high performance, accurate temperature control, elementary diagnostics, and troubleshooting. The built-in display shows the temperature and error codes if the problem occurs.

Remote control

The remote controller is included as the standard characteristic on some models. Information technology shows the current inlet and outlet temperature, flow charge per unit, and fault codes when the fault is detected and allows you to increase or subtract the outgoing hot water temperature, a very user-friendly feature.

Safety features

AO Smith gas units are equipped with several rubber features for greater protection:

  • An Air-Fuel Ration Sensor or AFR ensures proper air/gas mixture for the make clean gas combustion inside the combustion chamber. This style, gas emission is reduced, the performance is optimized, and parts can last longer.
  • An Overheat protection will shut downwardly the unit of measurement if the pre-set temperature is exceeded.
  • Power failure protection will cutting off the gas supply to the unit if the unit loses electrical power.
  • Flame failure protection allows the tankless heater to close down if, for any reason, the burner flame is extinguished.
  • A fusible link would break and shut down the tankless h2o heater if overheat protection didn't forbid the temperature from rise.
  • A power surge fuse is a glass fuse that blows in the instance of an over-current.
  • Internal freeze protection, an essential feature when the unit of measurement is exposed to cold conditions.

Warranty

AO Smith tankless water heaters come with a xv-year limited warranty on the heat exchanger and for residential water heating, 6 years in the commercial application (or 10 years on 510 and 540 models), and v years on all other parts. The extended warranty and advanced features are what brand tankless models the best type to buy.

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