Tankless water heaters are growing in popularity among Los Angeles homeowners due to their energy efficiency, compact size, and endless supply of hot water. These units offer numerous advantages over traditional tank-style heaters, making them an attractive option for those looking to upgrade their home’s water heating system. However, with various brands, models, and configurations available on the market, choosing the right tankless water heater for your home can be a daunting task.

As a leading plumbing service provider in Los Angeles, John’s Plumbing & Drain Services is dedicated to helping homeowners navigate the decision-making process, ensuring you select a tankless water heater that best meets your needs and preferences. Our team of expert technicians specializes in tankless water heater installation, maintenance, and repair, offering guidance and support to help you reap the full benefits of this innovative technology and enjoy a continuous supply of hot water for your household.

In this guide, we will discuss the key factors to consider when selecting a tankless water heater for your Los Angeles home and how John’s Plumbing & Drain Services can assist you throughout the entire process—from system selection and installation to ongoing maintenance and support. If you are considering upgrading to a tankless water heater or need expert advice and reliable services, contact John’s Plumbing & Drain Services today to discuss your unique requirements and make an informed decision for your home’s water heating needs.

1. Fuel Type: Gas vs. Electric

One of the first decisions you’ll need to make when selecting a tankless water heater is whether to choose a gas-powered or electric-powered model. Each type has its own set of advantages and potential drawbacks:

  • Gas-powered tankless water heaters typically offer a higher flow rate, meaning they can deliver more hot water simultaneously, making them ideal for larger households. However, they often require additional venting and gas line installation, which can increase the upfront cost.
  • Electric tankless water heaters typically have a lower initial cost and are easier to install since they don’t require venting. However, they may not provide the same level of flow rate as gas-powered units and might require an electrical panel upgrade.

When deciding which fuel type is right for your home, consider factors like installation costs, energy efficiency, and your household’s hot water needs.

2. Size and Flow Rate

Sizing is an essential factor to consider when choosing a tankless water heater, as it directly impacts the unit’s ability to meet your hot water demands. Tankless water heaters are rated by their flow rate, measured in gallons per minute (GPM). To calculate the appropriate size for your home, tally up the flow rates of all the fixtures you plan to use simultaneously and choose a model that can accommodate that demand.

When determining the appropriate size, consider factors like the number of household members, typical hot water usage patterns, and whether you plan to add any additional fixtures in the future.

3. Energy Efficiency

One of the primary advantages of tankless water heaters is their energy efficiency, as they only heat water when it’s needed, reducing heat loss and saving energy. When comparing different models, look for the Energy Factor (EF) rating, which indicates how efficiently the unit converts fuel into hot water. A higher EF rating means greater energy efficiency and cost savings over time.

Additionally, be sure to explore available rebates and tax incentives for energy-efficient water heaters to offset the initial costs further.

4. Installation and Maintenance Considerations

The installation of your tankless water heater can have a significant impact on its performance and longevity. Work with a reputable plumbing service provider like John’s Plumbing & Drain Services to ensure a professional and seamless installation process. Request a comprehensive quote that includes installation costs and any necessary upgrades to your home’s plumbing infrastructure.

Additionally, be mindful of the maintenance requirements of your chosen tankless water heater, as a well-maintained unit will perform more efficiently and last longer. Speak with your plumbing professional about recommended maintenance schedules and any specific recommendations for your selected model.

Why Choose John’s Plumbing & Drain Services for Your Tankless Water Heater Needs

1. Expert Guidance and Assessment

Our experienced team at John’s Plumbing & Drain Services will help you determine the best tankless water heater for your home, taking into consideration factors like fuel type, size, energy efficiency, and overall compatibility with your existing plumbing system.

2. Professional Installation and Ongoing Support

Our skilled technicians provide seamless installation services and will work closely with you to ensure your tankless water heater is performing optimally. We also offer ongoing maintenance and support to help prolong the life of your unit and maintain its efficiency.

3. Unbeatable Customer Service

At John’s Plumbing & Drain Services, customer satisfaction is a top priority. We ensure every interaction, from consultation to installation and beyond, exceeds your expectations and delivers long-term value for your investment.


Investing in a tankless water heater can greatly improve your home’s energy efficiency, comfort, and convenience. By considering factors such as fuel type, size, energy efficiency, and professional installation and maintenance services, you can make a well-informed decision for your Los Angeles home. 

Contact John’s Plumbing & Drain Services today for expert plumbing services in Los Angeles, including tankless water heater installation and maintenance, and experience the benefits of an efficient and reliable water heating system.

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Our water heater began spewing water this morning.  John was the first plumber in the area to answer my call, and was able to get to my house within 10 minutes of the call.  He fixed the problem promptly and for what seemed to be a reasonable price.  He was friendly and informative.  I will definitely call John again and will recommend him to neighbors.  Thanks, John!
-Caitlin R


John has done numerous plumbing projects around my house and has always done excellent work.  He's quick to respond to my inquiry's and even replaced my water heater on a Sunday.  Most recently, I had him install a water purification system and new faucet.  His prices are reasonable and he will continue to be my go-to plumber.
-Rachel R.

Very helpful guy, thank you for the quick service and low service fee 🙂 Job well done.
-Sandra F.


These guys are the best! If you're looking for a legit plumber, call John's Plumbing & Drain Services in Atwater Village. Fairest price, honest and very knowledgeable!
-Ashley C.

Project: Install a Tankless Water Heater System

Comments: john and company were very efficient. they took their time and got the job done right. they replaced my standard water heater with a rinnai tankless water heater. while they were here, I also had them install a earthquake shut-off valve. great job at a reasonable price. I am keeping john as our regular plumber for the future.
Sergio S. in La Crescenta, CA

Project: Install, Repair or Replace Plumbing or Fixtures

Comments: My tenant is happy so I am happy. John was very patient with me and explained everything before he did the job. Very nice over the phone and I will use him again for future plumbing needs.

 Marilyn L. in Pasadena, CA

Project: Install, Repair or Replace Plumbing or Fixtures

Comments: I am very pleased. I've had John do the top priority job of repairing a leaking drainpipe and his work looks to be top notch. I'm definitely thinking of using him for the larger job of repiping the whole house (replacing the failing M-type copper with L-type). And again, John's bid is within my budget considerations. Highly recommended.

Homeowner in Glendale, CA

Project: Install or Replace a Water Heater

Comments: John was great. He gave me options and worked with me to find a solution that worked within my budget. Very professional. I will definitely use him again for any plumbing issues.

Laura W. in South Pasadena, CA

Project: Install or Replace a Water Heater

Comments: John was very responsive to my initial call, showed upon time and did excellent work at a fair price to replace my water heater. I highly recommend him and I plan to use him for future plumbing needs

Gary P. in Sherman Oaks, CA

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Comments: We had them run a snake from our sewer line out to the street, as we have lots of trees with roots that sometimes get into the line. They came as scheduled, did a great job and the price was as quoted.

Colleen L. in Pasadena, CA


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John's Plumbing & Drain Services

3847 Brunswick Avenue, LA, Ca, 90039

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