1. Water Heaters New/Used Products
  2. sku: 4945546371772632
  3. SMITH ATO-540HX3-P

A. O. SMITH ATO-540HX3-P Propane Tankless Water Heater A.o. 101

Ato-540hx3-p A. O. Smith A.o. 101 Outdoor Liquid Propane Tankless Water Heater

( Brand: A. O. Smith ), ( Manufacturer Part Number: ATO-540HX3-P ), ( Model: ATO-540HX3-P 101 ), ( Type: Tankless Water Heater/boiler ), ( Power Source: Propane Liquid )

Review A. O. SMITH Ato-540hx3-p.o. 101 Outdoor Liquid Propane Tankless Water Heater

The Smith ATO-540HX3-P propane tankless water heater is a high-performance, energy-efficient solution for your home's hot water needs. This model is part of Smith's Advanced Technology Outdoor (ATO) series, which is designed for outdoor installation and is capable of delivering a constant supply of hot water for multiple applications.

The ATO-540HX3-P is rated for a maximum input of 540,000 BTUs and can deliver a flow rate of up to 10.1 gallons per minute. This makes it an excellent choice for larger homes or commercial applications where high hot water demand is common. The unit is also equipped with a condensing technology that extracts more heat from the exhaust gases, resulting in greater energy efficiency and cost savings.

The tankless design of the ATO-540HX3-P means that it heats water on demand, eliminating the need for a storage tank. This not only saves space but also reduces standby energy losses and the potential for tank leaks. The unit is also equipped with a digital control panel that allows for easy temperature adjustment and diagnostics.

The ATO-540HX3-P is designed for outdoor installation and comes with a weatherproof, powder-coated stainless steel exterior that provides excellent durability and resistance to the elements. It also features a compact size and a low NOx emission rating, making it a great option for installations in areas with strict emission regulations.

Additional features of the ATO-540HX3-P include a built-in recirculation system that can help reduce hot water wait times, a freeze protection system that can be activated during cold weather, and a direct vent kit that allows for installation in areas with limited venting options. The unit also comes with a 15-year heat exchanger warranty and a 5-year parts warranty, ensuring peace of mind for homeowners and business owners alike.

In summary, the Smith ATO-540HX3-P propane tankless water heater is a powerful, energy-efficient, and reliable solution for high hot water demand applications. Its outdoor design, advanced technology, and user-friendly features make it an excellent choice for larger homes or commercial installations, while its compact size, low NOx emissions, and long warranty provide peace of mind for homeowners and business owners alike.

The Smith ATO-540HX3-P PRO Series Natural Gas Tankless Water Heater is a popular choice for those seeking an efficient and continuous water heating solution. Here are some pros and cons that might help you make an informed decision:

Pros:

1. Energy Efficiency: Tankless water heaters do not store hot water, instead, they heat water on demand. This results in energy savings as you only heat the water you need.

2. Endless Hot Water: Since the water is heated on demand, you can have an endless supply of hot water.

3. Space Savings: Traditional tank water heaters can take up a significant amount of space. Tankless models are much smaller and can be installed on walls, freeing up floor space.

4. Longer Lifespan: Tankless water heaters have a longer lifespan compared to traditional tank water heaters.

Cons:

1. Initial Cost: Tankless water heaters can be more expensive to purchase and install compared to traditional tank water heaters.

2. Installation Complexity: Installing a tankless water heater requires specialized knowledge and tools. Hiring a professional plumber is recommended.

3. Cold Water Sandwich Effect: When using multiple appliances that require hot water simultaneously, there might be a brief delay between the hot water supply. This is known as the cold water sandwich effect.

4. Venting Requirements: Proper venting is necessary for safe and efficient operation. This may require additional costs for venting materials and installation.

In conclusion, the Smith ATO-540HX3-P PRO Series Natural Gas Tankless Water Heater offers energy savings, endless hot water, and space savings. However, it comes with a higher initial cost, installation complexity, the possibility of a cold water sandwich effect, and venting requirements.

Based on the information provided, if you are looking for energy savings, endless hot water, and space savings, the Smith ATO-540HX3-P PRO Series Natural Gas Tankless Water Heater could be a good investment. However, if you are on a tight budget or prefer a simpler installation process, a traditional tank water heater might be a better option. Ultimately, it's essential to weigh the pros and cons and consider your specific needs and budget before making a decision.

Details:

With a power source of propane liquid, this tankless water heater is designed to quickly and effectively heat on demand, making it convenient energy-efficient option for those in need reliable hot. Smith brand is known for ensuring quality and performance, making this model a trusted choice various residential commercial applications. Smith ATO-540HX3-P 101 Outdoor Liquid Propane Tankless Water Heater is a reliable and efficient solution for providing hot water in outdoor spaces.

part #: ato540hx3 price

  • $989.95

specifications wateheat:

  • brand: A. O. Smith
  • mpn: Ato-540hx3-p
  • model: Ato-540hx3-p 101
  • type: Tankless Water Heater/boiler
  • power source: Propane Liquid

general wateheat:

  • condition: New
  • Heating, Cooling Air > Water Heaters > Tankless Water Heaters

shipping wateheat:

  • type: Fixed
  • carrier: USPS
  • class: Expedited
  • cost: $395.00
  • service: USPS Priority Mail
  • transit: 4-10 Days

returns wateheat:

  • method: Money back
  • policy: Returns Accepted
  • paid by: Buyer
  • time: 30 Days

offer wateheat:

  • best offers: True
  • availability: In Stock
  • sold: 0
  • quantity: 1
  • options: Ship-to-home
  • started: August 19, 2025

seller wateheat:

  • city: Pompano Beach, Florida
  • rating: 80.0%
  • # reviews: 6

payments wateheat:

  • credit card: Mastercard
  • other
  • wallet: Google-pay
type: tankless water heater/boiler, power source: propane liquid,
category: home & garden > heating, cooling air > water heaters > tankless water heaters, sku: 4945546371772632,

A. O. Smith ATO-540HX3 Is Similar To:

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1 offer $989.95 USD
  • Offer #1: $989.95 price + $395.00 shipping estimate = $1384.95* total. Smith brand is known for ensuring quality and performance, making this model a trusted choice for various residential and commercial applications. The A.O.+$395.00 shipping

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