In summary, no, you don’t have to run new wire. But running new wire may end up costing a lot less. The tankless heater will be running at 240V already, guaranteed, so this doesn’t help you at all.

Can I add a tankless water heater to existing system?

One solution that is often recommended by plumbers is the installation of an electric tankless water heater booster which can fit right onto your existing gas or electric tank-style water heater or be mounted nearby on a wall.

Do tankless water heaters need special wiring?





You must utilize either a 120- or 240-volt circuit, wholly devoted to the heater. Both voltages require 8-gauge wire, and the section exposed to the area under the sink must be armored cable.

Can you switch to a tankless water heater?

Quote from the video:
Quote from Youtube video: So you'll get to see what it looks like when you're swapping out a traditional tanked water heater for an electric tankless on-demand water heater by ecosmart.

What are the electrical requirements for an electric tankless water heater?

One whole-house tankless water heater has four 7,000-watt elements, for a total electrical load of 28,000 watts. This load re- quires wire and a circuit breaker that will handle at least 120 amps, at a cost many times that of electrical service to a conventional tank water heater.

Can you use the same wiring for a tankless water heater?

In summary, no, you don’t have to run new wire. But running new wire may end up costing a lot less. The tankless heater will be running at 240V already, guaranteed, so this doesn’t help you at all.

Can I replace an electric water heater with a tankless water heater?





Generally, you can replace an existing conventional water heater with a similarly powered tankless unit, although there are a few considerations depending on the power source: For electric systems, you will need to address the additional voltage and amperage requirements of a tankless heater; for gas systems, there …

Does a tankless water heater use a lot of electricity?

Most American families use around 50 gallons of hot water per day. To meet this demand, an electric tankless water heater will use 9–12 kWh of electricity. An electric tankless water heater needs about 3 kWh of electricity to heat a 10-minute shower.

What size breaker is needed for a tankless water heater?

Typical tankless requires 40-50 amp breaker for each wire. Each wire supplies 1 element. This example requires 3 breakers rated 40-50 amp = 120+ total amps. 150 amps main breaker: 150 amps x 80% = 120 amps safe maximum so there is no electricity left for other appliances.

What is the downside of a tankless water heater?

The main disadvantage of tankless water heaters is their upfront cost (unit and installation) is significantly higher than tank-style heaters. Including installation, tankless water heaters cost 3 times more than tank-style water heaters on average.

Why is tankless water heater installation so expensive?



Tankless water heaters have a higher initial price compared to tank heaters, costing homeowners between $1,200–$3,500. The higher cost is a result of a more labor-intensive set-up, as new gas and water lines are required for installation. For electrical tankless heaters, new electric wiring will need to be installed.

What size tankless water heater do I need for a family of 4?

What Size Tankless Water Heater Do I Need For A Family Of 2, 3, 4, 5, Or 6?

Number Of Family Members: Gas Tankless Heater Size (GPM) Electric Tankless Heater Size (kW)
What size tankless water heater do I need for a family of 3? 7-9 GPM 15-23 kW
What size tankless water heater do I need for a family of 4? 8-10 GPM 20-28 kW

Which is better hot water tank or tankless?

According to Energy.gov, “For homes that use 41 gallons or less of hot water daily, demand (or tankless) water heaters can be 24% to 34% more energy efficient than conventional storage tank water heaters.” Tankless water heaters (if gas-fired) will save homeowners over $100 annually the longer they remain in service.

How much does it cost to convert to tankless water heater?



Tankless water heater installation costs $800 to $3,500 on average. Tankless hot water heater prices are $300 to $2,100 for a gas or electric on-demand system, plus $300 to $2,500 for installation labor. Tankless water heaters save $40 to $200 yearly by reducing energy costs by 8% to 34%.

Can a tankless water heater fill a tub?

To further clarify, you can fill an oversized bathtub when you have a tankless water heater, but not when another appliance or fixture is using hot water. And, if the tub’s faucet delivers a heavy flow, you may have to slow down the water a little when filling it.

What is the cheapest hot water system to run?

For most households, a solar hot water system can be the most efficient and cheapest to run. If that’s not an option, here are other suggestions. Small household (1–2 people): Continuous flow hot water system (gas or electric) or small gas storage hot water system.

What is the most efficient electric hot water system?

Heat pumps are one of the most energy-efficient hot water solutions. While they need electricity to run, they are said to be roughly three times more efficient than traditional electric water heaters.

What brand of water heater is the most reliable?



15 Best & Most Reliable Water Heater Brands in the World

  • A.O. Smith. …
  • Rheem. Rheem was founded in 1925 by two brothers, Donald and Richard Rheem – and with financial backing from a third brother, William. …
  • Kenmore. …
  • Bradford White. …
  • American Standard. …
  • American Water Heaters. …
  • Bosch. …
  • EcoSmart.