Types of Tankless Water Heaters and How To Choose Yours

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Choosing the right water heater for your home is a crucial decision that impacts both your comfort and energy bills. With the rise in popularity of tankless water heaters, many homeowners are making the switch to these efficient systems. However, selecting the best tankless water heater for your home can be a daunting task given the variety of options available. The Plumbing Doc aims to demystify the different types of tankless water heaters and guide you through the selection process.

Electric Tankless Water Heaters

Electric tankless water heaters are popular due to their relatively lower upfront cost and straightforward water heater installation process. These units use electric elements to heat water on demand. They are ideal for smaller households or point-of-use applications, such as a single bathroom or kitchen sink.


– Lower initial cost

– Easy installation

– Compact size


– Higher operating costs compared to gas models

– Limited flow rate may not meet the needs of larger households

Gas Tankless Water Heaters

Gas tankless water heaters use natural gas or propane to heat water. They are more powerful than electric models and can provide a higher flow rate, making them a suitable water heater replacement option for larger households or homes with high hot water demand.


– Lower operating costs

– Higher flow rate

– Suitable for whole-house applications


– Higher initial cost

– More complex installation requiring ventilation

– Requires access to a natural gas or propane supply

Condensing Tankless Water Heaters

Condensing tankless water heaters are a type of gas water heater that captures and reuses the heat from the exhaust gases, making them more energy-efficient. These units are ideal for environmentally conscious homeowners looking to reduce their carbon footprint and energy bills.


– High energy efficiency

– Lower operating costs over time

– Environmentally friendly


– Higher upfront cost

– More complex installation

Non-Condensing Tankless Water Heaters

Non-condensing tankless water heaters are the standard type of gas water heaters. They are less expensive than condensing models but less efficient as they vent hot gases directly outside.


– Lower initial cost compared to condensing models

– Reliable performance


– Lower energy efficiency

– Higher operating costs

When selecting a tankless water heater, consider the following factors:

Professional Services

Make sure to seek the assistance of a professional like The Plumbing Doc when you need water heater repair in Rosedale, CA.

Hot Water Demand

Calculate your household’s peak hot water demand in gallons per minute (GPM). This will help you determine the required flow rate. Larger households or homes with multiple bathrooms will need a higher GPM and more frequent water heater services.

Energy Source

Decide whether an electric or gas model suits your home’s infrastructure and budget. If you have access to natural gas or propane, a gas tankless water heater may be more cost-effective in the long run.


Consider the energy efficiency of the unit. Condensing models, although more expensive upfront, offer higher efficiency and lower operating costs.


Evaluate your budget for both the initial purchase and long-term operating costs. While electric models are cheaper to install, they may have higher electricity costs compared to gas units.

Ready to upgrade to a tankless water heater? The Plumbing Doc is here to help. Contact us today to schedule a consultation.



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