(208) 870-6468

tankless water heater being serviced in garage wall

Tankless Water Heater Vs. Traditional Hot Water Heater

Tankless water heaters and traditional water heaters are different in many ways, such as how they use energy, how much they cost, how they are installed, and how they need to be maintained. Below we are going to outline the main differences of tankless water heaters vs. traditional water heaters.

4 Key Differences About Tankless Water Heaters vs. Traditional Water Heaters.


  1. Differences In Energy Efficiency:

A tankless water heater is more energy-efficient than a traditional water heater. Unlike traditional water heaters, which constantly keep a large tank of water heated, tankless water heaters heat water on-demand, only when it’s needed. This means they don’t waste energy heating water that won’t be used. As a result, tankless water heaters can be up to 30% more energy-efficient than traditional water heaters.

  1. Differences In Cost:

Tankless water heaters are generally more expensive than traditional water heaters. However, they can save money in the long run due to their energy efficiency. Traditional water heaters are less expensive upfront but can be costly to operate over time, especially if you have a large family that uses a lot of hot water.

  1. Differences In Installation:

Tankless water heaters are more complex to install than traditional hot water heaters. They require a dedicated gas line or electric circuit, and in some cases, modifications to the existing plumbing. This can make installation more expensive than traditional water heaters. Additionally, tankless water heaters may require larger gas lines or electrical circuits, depending on the size of your home and the number of appliances that use hot water.

  1. Differences In Maintenance:

Tankless water heaters require less maintenance than traditional hot water heaters. Traditional water heaters have a tank that can rust or corrode over time, and the sediment buildup can reduce their efficiency. Tankless water heaters do not have tanks, so there is no risk of rust or sediment buildup. However, tankless water heaters do require periodic descaling to remove mineral buildup in the heat exchanger, which can affect performance if left unaddressed.


In general, tankless water heaters use less energy and cost less to maintain over time, while traditional water heaters cost less up front and may be easier to install. The best choice for you will depend on your budget, hot water needs, and personal preferences. Give Trojan Plumbing a call and we can help you find the best water heater for you and your family.