The Benefits and Disadvantages of Tankless Water Heaters -

A tankless water heater is a water heater that heats water instantly as it flows through the device. Unlike traditional heaters, this demand-type or instantaneous water heater provides hot water only when it is needed.

It certainly has a number of advantages over the traditional tank style and can be an excellent long-term investment. However, there are still limitations to this type of heater. It may not be a suitable choice for every home.

Here are some benefits and disadvantages to know before making the switch and starting a new plumbing installation project.


1. Energy Efficiency

The main benefit of a tankless water heater is energy efficiency. It can reduce energy usage by 24% to 34%, that is if you use less than 41 gallons of hot water daily. If you use more hot water, tankless units will only be 8% to 14% efficient since they are running more often.

The reason for the savings is that tankless water heaters are able to supply hot water on demand without wasting energy on unused water. Traditional water heaters use more energy as they store hot water and continually reheat the water again whenever in use.

2. Big Savings

You can save money on utility bills since you’re using less energy. This is especially helpful if you live in an area with high energy costs.

3. Durable

A tankless water heater is expected to last for 10 years or more. This means that this investment should provide you with many years of use as it pays dividends over its lifespan. Make sure to clean your filters and have your unit checked at least once to twice a year to prevent damage and get as much longevity as possible from your tankless water heater.

4. Easy Installation

Say goodbye to complex water plumbing systems and gas lines as you won’t need them with tankless water heaters. You just have to look for a suitable area near an electrical outlet to mount your unit. A plumbing professional can help ensure that everything is properly grounded.

5. Space Saver

Tankless water heaters are small and do not have storage tanks. This frees up space in your home.

6. Unlimited Supply of Hot Water

Tankless water heaters can provide an unlimited supply of hot water. However, tankless units have a maximum flow rate and could only heat a certain amount of water at any given time. As long as your water usage stays within the limit, you don’t have to worry about running out of hot water.


1. Unit and Installation Costs

The initial unit and installation costs can be costly upfront. Moreover, there are different factors that can put the unit at risk. Installing special wiring needs and water softening systems can add to the overall cost.

2. Tankless water heaters can fluctuate when used more than once at a time

Your tankless water heating system can fluctuate if you use it as your main source of water supply and when used for multiple uses such as washing the dishes, doing laundry, and showering. If you consistently use multiple sources of hot water usage at a time we suggest you install multiple tankless systems to work around the issue.

3. Power Outage

Tankless water heaters are dependent on electricity so if the power goes out, you won’t have access to hot water. Tank-style water heaters are at an advantage in this aspect as they can store and keep the water hot for days. 

Bottom Line

A tankless water heater will meet most families’ and more. It’s a great lifelong purchase for your home as it will help you save money long-term and improve your home’s energy efficiency output.

If you’re planning to make the switch, click the “Free Quote” button below to schedule a time with a plumbing professional. Allow our pros to help you and ensure that you are making the right choice for your home!