Pros & Cons of Tankless & Traditional Water Heaters | Service One

Pros & Cons of Tankless & Traditional Water Heaters

There’s nothing worse than waking up at the crack of dawn expecting a warm, soothing shower but getting a downpour of icy water instead. Equally unenjoyable is not having the proper temperature to wash your clothes, and as a result, ruining your favorite items. Water heaters prevent these kinds of mishaps by preheating water as needed for showering, dish washing, and laundry.

Water heaters are a necessary appliance year-round. Whether you use a tankless or traditional tank water heater is personal preference. Both have their merits, and if your water heater is humming away and doing its job as it should, there’s no reason to “fix what isn’t broken” just yet. However, when the time does come to replace your water heater, the choice of tankless or traditional tank becomes yours.

To help make your decision easier, we’ve rounded up the pros and cons of each option. No matter which one you select, Service 1 can take care of your residential and commercial water heater repair or replacement needs!


Tankless water heaters use electric or gas heat sources to warm up cooled water on-demand when you need it.


Long-term cost savings

Tankless water heaters offer significant energy – and therefore, cost – savings in the long run. states that tankless water heaters can be 24-34 percent more energy efficient in

homes using 41 gallons or less of hot water daily, and between 8-14 percent more energy efficient for homes that use a lot of water (around 86 gallons) per day. The less energy used, usually the more money you can save.

Easy installation

Tankless water heaters can be installed in a variety of places. Due to its smaller, more compact size, it can fit in closets, under sinks, in pantries, or in utility closets under stairwells. Note: these products are meant to be for indoor use only. Make sure to choose a spot inside (or in a garage) that is considerate of your current plumbing configuration and safe for your family. A professional technician will give you the best recommendation.

Lasts longer

Tankless water heaters are said to last twice as long as traditional tank water heaters, with lower operating and maintenance costs. The average life expectancy of a tankless heater is roughly 20 years.


Limited flow rate

Because tankless water heaters do not have a reservoir of water waiting to be used, they do have limits. Showering and doing laundry at the same time, for example, may push it to its limits.

Higher upfront costs

Tankless water heaters save money over time, but their initial costs can be pricey. Depending on the make and model, tankless options can cost anywhere from $2,000 to $4,000.

Upgrade fees

If you’re going from a traditional tank to tankless, the installation process is a little more complicated and requires some ingenuity. This can raise installation fees.

Traditional Tank

Traditional tank water heaters store and preheat 30-50 gallons of hot water to be used for showering, dish washing, and laundry as needed. Once the tank is empty, it refills to begin reheating.


Lower purchase price

Traditional water heaters are less expensive with an upfront cost that is usually half the expense of tankless.

Easier repairs and replacement

If you’re replacing a traditional water heater with another traditional water heater, the setup is pretty standard and easy to replicate. Repairs are also usually minimal.


Traditional water heaters are always a safe bet. Every plumbing technician you meet will know how a traditional heater works and be able to resolve any issues with them.



Traditional water heaters are larger, thus taking up more space. They also need to be stored indoors. This isn’t just for product preservation, but for safety. Water heaters are high-ticket items; if left in the open air, they could be prone to theft.

Higher utility bill

Heating water at a designated, pre-set temperature each day requires energy. The more energy, the higher the utility costs, particularly in the winter.

Shorter life

Traditional water heaters do not last as long as tankless water heaters. A traditional water heater normally lasts between eight to 12 years. If you’re noticing muddy water, loud clanging noises, and no hot water running from your appliances, chances are your water heater is on its last leg.

Contact Service 1 Plumbing, Heating & AC, Inc for all your plumbing service needs!

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