Tank vs. Tankless Water Heaters

Arizona Comfort Specialists are here to compare traditional storage water heaters and tankless water heaters, so you can decide what is right for your home.

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$100 Off A New Water Heater

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What's The Difference?

Water heaters, regardless of traditional tank or tankless, are costly investments for homeowners. Whether you're a new homeowner with first time construction or you're replacing an old system, it's important to understand the pros and cons of tank vs tankless water heaters.

What is a Traditional Tank Water Heater?

Storage tank water heaters are found in the majority of homes. Essentially, a tank water heater is an insulated tank that holds between 30 and 50 gallons of water. This tank is used to heat and store the water until it's needed at it's destination. Destinations can include the kitchen, bathroom, or even laundry. Additionally, there are natural gas and electric water tanks. Natural gas tank water heaters utilize almost 50% less energy to operate, resulting in lower costs.

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Pros and Cons of Tank Water Heaters


Significantly lower initial cost

Simpler technology; therefore, resulting in less maintenance and repair costs

Hot water can be used by multiple sources at once


Slightly higher utility bills

Occupy more space due to their size and cannot be installed outside of the home

Shorter lifespan (10-15 years) than tankless water heaters

You could run out of water in storage

What is a Tankless Water Heater?

Tankless water heaters are also known as on-demand water heaters. Why? Well, as you might be able to infer by the name, tankless water heaters don't store water like their traditional counterpart. Instead, high-power burners rapidly heat water as it transfers through the heat exchanger. Then, the hot water is delivered to it's destination. Tankless water heaters can be powered by electricity or gas and are found to be over 20% more energy efficient than storage water tanks.

Pros and Cons of Tankless Water Heaters


Saves money over time 

Longer lifespan (20-30 years) than tank water heaters 

Require a lot less space and can also be installed on outside walls

The water supply is hot when you need it versus waiting 30 seconds for it to heat up 


Higher initial cost

Installation, repair, and labor costs are more costly due to the complexity

Require yearly servicing to prevent damage and ensure efficiency

Limited flow rate

1-Year Warranty

If you're not satisfied, we're not satisfied. Arizona Comfort Specialists provides a 100% satisfaction guarantee on our work and a one-year parts and labor warranty on all plumbing repairs.


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Tank vs Tankless Water Heaters


If a tankless water heater fits the budget, it can end up saving you money in the long run and have a longer lifespan; however, tankless water heaters can also have output restrictions. Though the water is hot instantly, if there are multiple destinations requiring hot water, one might suffer.

Storage tank water heaters offer a reserve of hot water and typically cost less for installation and maintenance, but take up more space, and if you run out of stored hot water, it can take a while for the water to warm up again.

When it comes to tank versus tankless water heaters, it really depends on what you are looking and how much hot water you need at a time, where the unit can go, and your long-term goals for the unit and its costs.

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Need Water Heater Services?

If you need water heater services, whether it's new installation, repair, or replacement services, Arizona Comfort Specialists are here to help! Contact us today.

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Raving Reviews
Nickolas Schulz
Nickolas Schulz
April 15, 2024
Thank you to the Arizona Comfort Specialists team that came to my house and replaced our 27-year-old AC unit. Starting off, we had a great experience with Josias walking the site and figuring out the quote. His professionalism and warm personality were fantastic to interact with. I explained my needs and what we were looking for, and we were able to find the right product at the right price for our home. A week later Bryan and Tim came to the house and started bright and early on the dismantling of our old unit. After removing the old unit, they found that the compressor could not fit through our back gate, so they ordered a mobile crane to make sure it was done right without damaging the new compressor or our house. When they were done with the new air handler install, I asked a few clarifying questions. They both took time and care to make sure that I understood everything and felt comfortable with the result, phenomenal customer service! Once everything was installed, they cleaned up by vacuuming and wiping down the stair rails and trim, along with vacuuming the carpet. They didn't cut corners and did a thorough job! I would recommend the Arizona Comfort Team to anyone, they are a great company and they hire great people to do great work!
T Harrison
T Harrison
February 22, 2024
Had a great experience with Arizona Comfort Specialists! Josias was awesome during my initial quote and was very professional and knowledgeable about the Bosch systems (which was what I was most interested in). He noticed that my supply duct was a bit undersized for the unit and included an upsizing in the quote to allow the unit to have a better static pressure. They had great prices compared to my other quotes and a great warranty on the unit as well! On install day Bryan and I believe Tim? were a fantastic install team, they did a lot of hard work in the attic running the new flex ducts for the system. The unit had a bit of a dent on the louvers but they were able to come out that same day and replace the panel ASAP and the unit is looking great. Looking forward to a nice cool summer coming up!
Van Hansen
Van Hansen
January 16, 2024
We use John and his team at Arizona Comfort Specialists all the time on our remodeling projects. They do great work, are reliable and stand behind their services. Highly recommend them!
James Rooney
James Rooney
January 9, 2024
I've been working in all sectors of construction for 27 years. From residential to major commercial construction. I've crossed paths with a hell of a lot of HVAC Contractors in those years. It's safe to say, I've never worked with a HVAC company more professional than Arizona Comfort Specialists. Not only are their entire team (from office staff to field techs) a pleasure to work with but their owner (John) is both extremely knowledgeable and very gracious with his time when it comes to figuring out the intricacies of Air Conditioning (be it new install, retrofit, upgrade or servicing) as a whole. ACS are consummate professionals.
Victoria Hathaway
Victoria Hathaway
January 5, 2024
I have used Arizona Comfort Specialists for many years. I. Have found both Jason and David to be friendly, professional, knowledgeable, and honest. This year, when I needed a new HVAC, I knew I was in good hands. Quickly and efficiently had me up and running in no time. I highly recommend Arizona Comfort Specialists. Period.
Sakda Kesgomol
Sakda Kesgomol
January 5, 2024
The service was outstanding! Jay and David have worked with installing my air-conditioning unit and have always been so helpful with any questions or concerns that I had. They are easy to deal with and very respectful.
Gary Warnica
Gary Warnica
January 5, 2024
AZ Comfort Specialists did what they said, showed up on time, charged a fair price that didn’t exceed the estimate, performed excellent installation and clean-up! Josias was knowledgeable, friendly and professional. He communicates effectively and I felt like I understood exactly what needed to be done AND what didn't need to be done. EXCELLENT!!!
Jerzy Poprawa
Jerzy Poprawa
January 4, 2024
Arizona Comfort upgraded my Trane HVAC system end of last year. They are affordable, professional, and very organized. I will use them again for any HVAC needs.
Tony Martin
Tony Martin
January 2, 2024
Great response when we had a concern, and our problem was fixed in short order. Thanks for the excellent after-sale service!


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