How much does a Tankless Water Heater cost?
In general, the purchase and installation costs of a tankless water heater can be 2 to 2 1/2 times as much as a conventional tank-style water heater. However, energy savings with a tankless water heater typically result in a payback within just a few years for a family of four, making a tankless water heater a better long-term investment.
What Size Tankless Water Heater do I need?
Getting the right size water heater is crucial. Undersize the unit and you won’t have enough hot water; oversize it and you’ll overpay to both purchase and operate the tankless heater. There are many sizes available, ranging from 19,000 BTU to 200,000 BTU. It is stressed that a detailed consultation be set up to review your water use habits. This is the best way to make the most accurate estimation of your heater size and needs.
Factor in location.
Unlike a regular water heater, a tankless model’s water output is immediately affected by groundwater temperatures. The same model that produces 7.2 gallons per minute (GPM) when installed in a warm Florida garage will output only 4.2 GPM in a cold New England basement because the colder water requires the temperature to be raised 77 degrees rather than 44. Use your coldest groundwater temperature to calculate the gallons per minute you’ll need.
Get the details right.
Look for an oxygen-depletion sensor that shuts off the water heater if carbon monoxide is detected and a film wrap around the heat exchanger that will shut off the device if it gets too hot. Since tankless models are still relatively uncommon, consider using manufacturer-trained installers. Some companies extend the warranty if you do.
Tankless water heaters deliver hot water instantaneously. It takes time to heat the water to the target temperature. Just like storage water heaters, any cold water in the pipes needs to be pushed out. And tankless models’ electric controls mean you’ll also lose hot water during a power outage.