How Much Does a Whole House Tankless Water Heater Cost?

how much does whole house heater costs

Tankless water heaters are becoming popular. This water heater does not have a storage tank and will heat up the water on demand. The tankless water heater will reduce the waste of energy and will help a person save money on their utility bills. A tankless water heater can be used to heat up a specific area of the home or the entire home. Many people wonder how much does a whole house tankless water heater cost and if they can afford it. The water heater is going to have a higher upfront cost but can help a person save money in the long run.

How Much Does a Whole House Tankless Water Heater Costs?

There are some averages that a person can use to help them determine the cost of the whole house tankless water heater. A tankless water heater that is large enough to provide hot water to the entire home ranges between $1,470 and $2,510. The size of the water heater needed will depend on the size of the home and how many people are in the home to use the hot water. The whole house tankless hot water heater will be around $1,000. Most of these heaters are gas-powered. There are some electric models but for this size, they may be a little harder to find. The hot water heater will have a pilot light and when the system is on it can provide hot water almost instantly.

how much does whole house heater costs

If a person is looking for a tankless hot water heater they can save some money if they can get an electric one. This model will cost between $800 and $1,600 for installation. There is no need to have vents and they are more energy-efficient. This tankless hot water heater can provide hot water to the entire home.

The tankless hot water heater is going to vary by the brand that a person chooses to purchase. While the average cost is still around $1,000 some brands will not charge as much money. A person should research the brand before making a purchase. They need to make sure that the hot water heater will provide enough water for their home and they are getting a quality product. They should also look and see if the manufacturer is going to offer a warranty on the hot water heater and the duration of this warranty.

Whole House Tankless Gas Water Heater Around $500

  • Endless on-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature
  • Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 17 x 17 x 3.75 inches
  • Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used. Save up to 50% in water heating costs according to the Department of Energy
  • EcoSmart ECO 27 Sizing; Refer to the sizing map. Requires 3x40 AMP Double Pole Breaker, 27-kilowatt tankless electric water heater ideal for providing hot water for whole home applications; provides between 2.7 and 6.5 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution
  • Warranty and Certifications; Limited Lifetime Warranty on electronics, exchanger and element; UL-499 certified; ETL Listed
  • Required Breaker Quantity: Three 40 Amp Double Pole
  • Recommended Electrical Panel: 200 Amps
  • NEVER run out of hot water with an ECOSMART tankless water heater.
  • Save up to 12 cubic feet of storage space.
  • Digital temperature control in 1-degree increments gives users complete control of hot water

Whole House Tankless Electric Water Heater

  • Endless Hot Water: Our tankless hot water heaters offer unlimited whole-home hot water flow and come equipped with Circ-Logic for pairing with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation
  • Energy and Space Efficient: The tankless design of this small hot water heater saves on space and conserves energy as it heats only when necessary
  • Optimal Water Pressure: With a hot water flow rate of up to 11 GPM, this tankless water heater provides a powerful, constant stream that can accommodate up to 7 appliances at once
  • Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your water heater; We do not recommend installing a water heater without a technician
  • Guaranteed to Last: 15-, 5-, and 1-year residential for heat exchanger, labor, and parts, respectively; Wifi monitoring available with Controlr module (not included)
  • ENERGY STAR qualified with Uniform Energy Factor of 0.105

Small Whole House Tankless Water Heater

  • Tankless Water Heater
  • 220 V
  • 54 Max Amps

How Much Does Installation Cost for the Whole House Tankless Hot Water Heater?

In addition to purchasing the whole house tankless hot water heater, a person will need to pay to have it installed. The average installation cost is around $2,000. Some things are going to have an impact on the cost of the installation. This will include the fee for labor from the plumber and the heating equipment that is in the home. Materials and parts needed can add to the cost. A person will also need to purchase a vent kit which is around $100 and there is the piping that is needed that is going to cost around $10 per square foot.

best whole house tankless water heater

A plumber can charge between $50 and $120 an hour to install a tankless hot water heater. This is for the basic installation. The installation of the tankless hot water heater can take around 3 or 4 hours. The plumber’s fee alone will cost between $150 and $600. Some plumber may also charge an additional estimate fee before they do any work. If they need to remove a hot water heater that is already in the home this will cost around $500.

To make sure that the tankless hot water heater is large enough to handle the demands of the home a person needs to calculate the demand the household has for hot water. They need to look at the BTUs and make sure that the hot water heater can keep up with this. If a person does not understand this they may need the assistance of a plumber but that is going to cost more money.

A tankless water heater for the home is going to have a higher upfront cost. Over time a person can see some savings. They will use less water and less electricity. For most people, this outweighs the upfront cost of having a tankless water heater installed to provide hot water to the entire home.


David: Penn State-educated Mechanical Engineer and Business-savvy Fluid Dynamics Specialist. Balances family plumbing business support with a thriving engineering career at a top, undisclosed company. (they want it that way) I help Will with plumbing and HVAC needs on his Real Estate.

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