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Water Heater Doctor

We Do Tankless
Water Heaters
Fast Service
Affordable Prices
Best Tanks
Best Technicians
Best Warranty
Satisfaction Guaranteed
Military Discounts

At Water Heater Doctor We Understand That Each Home has unique needs when it comes to heating water factors such as the size of the home, the number of occupants, the frequency and manner of hot water usage, and even geographical location can greatly influence the optimal choice of water heating system. Choosing a water heater is about assessing your specific needs, preferences, and circumstance and making an informed decision accordingly. Tankless water heaters shine particularly in homes where space is limited, or where demand for hot water is high. Our team at Water Heater Doctor is committed to helping you navigate this process, offering expert advice and top-notch service to ensure you find the right water heater for your home.

Gas Tank Compare Gas Tankless
Lower up front, higher over lifetime
Higher up front, lower over time
10-15 years
15-20 years
100% gas dependent units will keep providing hot water
During power outage
No hot water
60% + | stand by heat loss
Efficiency Rating
95%+ Efficeincy
6-10 year tank/parts
15 year heat exchanger, 5 year remaning parts
Limited to size of tank. Typically 40-75 gallons
Hot water capacity
No holding tank, endless hot water
Energy Savings
$100-$500 yearly depending on household usage
More space needed to hold heater water
Less space needed, hangs on wall
Yes. Water is always heated weather or your using it or not
Stand by heat loss
No. Water isn't heated until needed
Most models self cleaning. Very minimal maintaince requried
Yearly mainteance needed


Energy Efficient

With Water Heater Doctor, efficiency is key. Tankless water heaters are one of our specialties & are an excellent choice for those seeking energy efficiency. These units only heat water as it is needed, eliminating the need for a storage tank & significantly reducing energy consumption. You can count on a tankless system to save up to 20-30% more energy compared to traditional water heaters. As a result, you'll enjoy lower utility bills, contributing to the health of your budget as well as our planet.

Endless Hot Water

Tankless water heaters are your solution for a continuous supply of hot water. These efficient systems heat water as you need it, so you'll never have to fear a cold shower or wait for the tank to refill. Enjoy the luxury of endless hot water with our reliable tankless systems.

Longer Warranty

Traditional water heaters typically come standard with a 6-10 year warranty. Tankless water heaters have extended warranties of up to 15 years, giving you added peace of mind. We're the doctors you can trust, offering premium products that come with substantial warranty periods - a testament to the longevity and quality of our tankless systems.


Longevity is a defining feature of our tankless water heaters. On average, traditional water heaters last 10-15 years, but our tankless models can last up to 20 years or more with proper maintenance. Like a reliable practitioner, our water heaters are built for the long haul, providing consistent and efficient performance year after year.

Save Space

Compact in size but powerful in performance - that's our mantra for our tankless water heaters. They're significantly smaller than their tank counterparts, which frees up space in your home. Whether you live in a compact urban dwelling or are simply looking to declutter, our tankless water heaters are a space-saving solution that delivers hot water without compromising your living space.


Higher Upfront Cost

Investing in a tankless water heater can entail a higher initial cost. This can be attributed to the more expensive materials used in these advanced systems, signifying their superior quality and longevity. Additionally, the process of transitioning from a traditional to a tankless water heater often requires changes to your home's system venting, plumbing configuration & possibly electrical system. This installation is more time-consuming & complex, which adds to the upfront costs. However, these initial costs should be viewed as an investment.

The energy efficiency of tankless heaters can provide substantial savings on your energy bills over time, while the durability of the materials extends the lifespan of the unit, both of which help offset the initial expense. At Water Heater Doctor, we ensure a smooth and professional installation process, setting you up for long-term savings and comfort.

Regular Maintenance

To ensure your tankless water heater performs optimally and lasts for its full lifespan, regular maintenance is crucial. This can include annual inspections and potentially descaling the system to prevent mineral build-up, especially in areas with hard water. While this does involve an ongoing commitment, at Water Heater Doctor, we provide comprehensive maintenance services to keep your system running at its best, just like regular check-ups for enduring health.

No Power, No Hot Water

Tankless water heaters depend on electricity to function, which can be a disadvantage during a power outage. Unlike traditional tank heaters, which have a reservoir of hot water, tankless units need power to heat water on demand. While power outages might be infrequent, it's something to consider when choosing a water heater.

Hot Water Delay

Sometimes, tankless water heaters may have a slight delay in delivering hot water, particularly when the faucet is a considerable distance from the unit. While it's usually just a matter of seconds, this "cold water sandwich" effect can be a minor inconvenience for some users.

Output Limit

While tankless water heaters provide on-demand hot water, there might be limitations if multiple appliances are drawing hot water simultaneously, especially in larger households. We at Water Heater Doctor are happy to consult on the best solutions for your specific needs to ensure you enjoy a constant, uninterrupted supply of hot water.

When it Comes to Water Heaters

we're the doctors you can trust!

A tankless water heater does not provide “instant” hot water in the sense that hot water comes out the moment you turn on the tap. Instead, it provides “on-demand” hot water. This means that the water is heated instantly as it passes through the unit, but there is still a delay between the moment the tap is turned on and when the heated water reaches the tap. The time it takes for the hot water to arrive depends on the distance between the water heater and the faucet.

How Tankless Water Heaters Work:

  • When a hot water tap is turned on, cold water travels through a pipe into the tankless water heater.
  • An electric element or gas burner heats the water as it passes through the unit.
  • Since the water heater starts heating water only on demand, it doesn’t supply hot water instantaneously. The delay you experience is due to the time it takes for the heated water to travel through the plumbing to reach your tap.

Factors Affecting Hot Water Delivery Times:

  1. Distance: The further the water has to travel from the heater to the tap, the longer it will take to receive hot water.
  2. Flow Rate: The flow rate of your plumbing fixtures can also impact delivery times. A higher flow rate means water moves faster through the pipes, reducing the wait time.
  3. Type of Plumbing: The type of pipes (e.g., copper vs. PEX) and their diameter can affect how quickly the water heats up and how long it retains heat as it travels.

Solutions for Instant Hot Water:

For those who want truly instant hot water, there are a couple of solutions that can be used in conjunction with a tankless water heater:

  1. Recirculation Systems: These systems circulate hot water through your plumbing so that hot water is always available near the points of use. Some tankless water heaters are equipped with built-in recirculation pumps, while external pumps can be added to others. This system can greatly reduce the wait time for hot water but may increase energy usage.
  2. Point-of-Use Tankless Water Heaters: Installing smaller, point-of-use tankless water heaters near specific fixtures (e.g., under a sink) can provide nearly instant hot water to that fixture by eliminating the distance the hot water must travel.


While tankless water heaters offer the convenience of on-demand hot water, eliminating wait times entirely usually requires additional solutions like recirculation systems or point-of-use heaters. Understanding the distinction between “on-demand” and “instant” hot water can help set realistic expectations for the performance of a tankless water heater in your home.

A tankless water heater, also known as an on-demand water heater, is an energy-efficient appliance designed to heat water directly without the use of a storage tank. When a hot water tap is turned on, cold water travels through a pipe into the unit, where it is heated by either an electric element or a gas burner. This process ensures that hot water is available in a continuous supply, eliminating the wait time for a storage tank to fill up and heat.

GPM stands for Gallons Per Minute, and it is a crucial metric when considering tankless water heaters. GPM measures the flow rate of water that the heater can provide at a given temperature rise. Essentially, it tells you how much hot water the unit can produce in a minute, which is vital for understanding whether a particular model can meet the hot water needs of your household.

Why GPM is Important:

  1. Determines Capacity: The GPM rating helps determine the capacity of the water heater, indicating how many hot water applications (like showers, washing machines, and sinks) can be used simultaneously without running out of hot water.
  2. Sizing Your Water Heater: Properly sizing a tankless water heater to your home’s needs involves calculating the total GPM required at peak usage times. This ensures that the water heater you choose can handle the demand when multiple fixtures are in use at the same time.
  3. Efficiency and Comfort: A water heater with a GPM rating that matches your household’s demands ensures efficient operation and continuous comfort, providing a steady supply of hot water without unnecessary energy use.

Calculating Your Needs:

To calculate your needs, you’ll need to add up the GPM of all fixtures that could potentially be in use simultaneously. Here’s an example:

  • Shower: 2.0-2.5 GPM
  • Kitchen Sink: 1.0-1.5 GPM
  • Dishwasher: 1.0-1.5 GPM
  • Washing Machine: 1.5-3.0 GPM

If all these could be in use at the same time, you would need a tankless water heater that can provide somewhere between 5.5 to 8.5 GPM to ensure you don’t run out of hot water.

Consider Temperature Rise:

The actual GPM output of a tankless water heater can also depend on the temperature rise required, which is the difference between the incoming cold water temperature and the desired hot water temperature. A unit may produce a higher GPM of hot water in a warm climate where the incoming water temperature is higher compared to a cold climate where the water heater needs to work harder to heat the water to the desired temperature.

Choosing the Right Unit:

When selecting a tankless water heater, consider both the GPM rating and the temperature rise at that flow rate to ensure it meets your hot water needs in the most energy-efficient manner. This approach will help you choose a unit that not only saves energy but also provides the convenience and comfort of continuous hot water.

When it comes to choosing a tankless water heater, one of the key decisions homeowners face is between condensing and non-condensing models. Understanding the differences between these two types of water heaters is crucial for selecting the right one for your needs, ensuring energy efficiency, and optimizing long-term savings.

What are Condensing Tankless Water Heaters?

Condensing tankless water heaters are designed to capture and utilize the energy from exhaust gases that would otherwise be wasted. These heaters have a secondary heat exchanger that condenses the exhaust gases to extract additional heat, pre-warming the incoming cold water. This process enhances efficiency, with many models achieving energy efficiency ratings of 90% or higher.

Benefits of Condensing Models:

  • Higher Efficiency: By utilizing exhaust gases, condensing models are more energy-efficient, reducing energy bills.
  • Environmental Impact: Lower greenhouse gas emissions due to better energy utilization.
  • Reduced Venting Costs: Since the exhaust gases are cooler, PVC pipes can often be used for venting, which is less expensive than the stainless steel venting required for non-condensing models.


  • Higher Initial Cost: Condensing units are generally more expensive upfront due to their complex design.
  • Maintenance Requirements: The additional components and the condensation process may require more frequent maintenance.

What are Non-Condensing Tankless Water Heaters?

Non-condensing tankless water heaters are the more traditional design. They heat water directly without the additional step of capturing heat from exhaust gases. As a result, their efficiency ratings are usually lower than those of condensing models, typically around 80-85%. The exhaust gases are hotter, which requires specific venting arrangements to handle the higher temperatures.

Benefits of Non-Condensing Models:

  • Lower Initial Cost: These models are less expensive upfront, making them attractive for budget-conscious consumers.
  • Simplicity and Reliability: With fewer moving parts and a simpler design, non-condensing models can be more reliable and easier to maintain.


  • Lower Efficiency: Less efficient than condensing models, leading to potentially higher operating costs over time.
  • Venting Requirements: The need for special venting materials can increase installation costs and complexity.

Choosing Between Condensing and Non-Condensing

The choice between condensing and non-condensing tankless water heaters depends on several factors:

  • Budget: If initial cost is a primary concern, non-condensing models might be more appealing. However, for those willing to invest more upfront for lower operating costs, a condensing model is the way to go.
  • Installation Considerations: The location of installation and the feasibility of venting can influence the choice. Condensing models offer more flexibility with venting options.
  • Energy Savings Goals: For homeowners prioritizing energy efficiency and long-term savings, condensing water heaters offer significant advantages.


Both condensing and non-condensing tankless water heaters have their place in residential settings, offering unique benefits tailored to different homeowner needs and preferences. By understanding the distinctions between these two types, you can make a more informed decision that aligns with your budget, environmental values, and efficiency goals. Regardless of your choice, transitioning to a tankless water heater is a step forward in enjoying continuous hot water supply and energy savings.

At Water Heater Doctor, we prioritize providing reliable, efficient, and practical solutions for our clients. As such, we have opted not to install or service electric tankless water heaters. These models can sometimes require substantial modifications to your home’s electrical system, including the addition of extra circuits, due to their high electrical demand.

Implementing these modifications is not only potentially complex but can also result in significant costs, which can make electric tankless water heaters a less economically feasible option compared to their gas counterparts.

Furthermore, we have found that electric tankless water heaters can sometimes fall short in terms of reliability. To ensure we’re offering you the most dependable and efficient solutions for your hot water needs, we focus on servicing and installing gas tankless water heaters, which we believe offer a superior balance of reliability, efficiency, and cost-effectiveness.

We value your comfort and satisfaction, and our team at Water Heater Doctor is always on hand to guide you through the process of choosing the most appropriate water heating solution for your specific needs and circumstances. Rest assured, we’re committed to helping you make an informed decision and providing the high-quality service you deserve.

Regular maintenance is essential for the optimal functioning and longevity of a gas tankless water heater. A well-maintained unit can last up to 20 years or more.

Professional servicing should be conducted at least once a year. This service typically involves checking for and fixing any leaks, inspecting the burner and venting system, descaling the heat exchanger, and checking the overall operation of the unit.

Regular maintenance is especially important if you have hard water, as the mineral deposits can build up over time and affect the efficiency and lifespan of the unit. Descaling or flushing the system can help prevent this buildup.

In addition to professional servicing, there are also some things homeowners can do, such as regularly checking for any visible signs of damage or leaks and cleaning the air filter as needed.

At Water Heater Doctor, we provide comprehensive maintenance services for gas tankless water heaters, ensuring they continue to provide efficient, reliable hot water for many years.

Tankless water heaters are designed for longevity. On average, they can last up to 20 years or even longer with proper maintenance, almost twice as long as traditional tank-style water heaters. Of course, this can vary depending on factors like usage, water quality, and regular maintenance. At Water Heater Doctor, we recommend scheduling regular servicing to ensure your tankless water heater stays in top shape for as long as possible.

Tankless water heaters heat water on-demand, which means they start heating water as soon as you turn on the tap. However, the time it takes for the hot water to reach your faucet will depend on the distance between the water heater and the faucet. If the faucet is far away from the heater, it may take a few seconds longer for the hot water to reach you. One way to overcome this delay is to install a dedicated recirculation line and recirculation pump however this can be costly.

While some homeowners may feel confident in their ability to install a tankless water heater on their own, we generally advise against it. Proper installation of a tankless water heater involves handling gas, electricity, and water, which can be dangerous if not done correctly. Additionally, a professional installation ensures the unit operates efficiently and safely. Incorrect installation can void the manufacturer’s warranty and potentially lead to significant repair costs down the line. At Water Heater Doctor, our experienced team can handle the installation process seamlessly, ensuring your peace of mind.

Non-Condensing Water Heaters: These traditional models heat water and immediately vent the exhaust gases to the outside. This process unfortunately allows some heat energy to escape, reducing the heater’s overall energy efficiency. Typically, non-condensing water heaters achieve energy efficiency ratings around 80-85%.

Condensing Water Heaters: Designed with energy efficiency in mind, condensing water heaters capture and repurpose some of the heat from the exhaust gases. They employ a second heat exchanger to extract heat before the gases are vented. This ‘recycled’ heat preheats the incoming cold water, reducing the energy needed to reach your desired temperature. With this innovative method, condensing water heaters can reach energy efficiency ratings up to an impressive 98%.

While the upfront cost for condensing water heaters is generally higher than for non-condensing models, their superior energy efficiency can lead to significant savings over time. Please note, condensing water heaters need a drain for the condensed water, which may impact installation location options.

At Water Heater Doctor, we’re committed to helping you make an informed decision that aligns with your specific needs, budget, and property layout. Whether you prioritize upfront cost, long-term energy savings, or installation simplicity, we’ve got you covered.

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