A person replacing an aging water heater turned to Reddit after noticing that a tankless unit seemed to cost about as much as a conventional tank model.
The discussion that followed focused less on the appliance price itself and more on the extra work that can make the overall project far more expensive.
Here's what to know
In a Reddit thread in r/Plumbing, the original poster said they were looking to replace a 24-year-old tank and were surprised to see a tankless option listed at a similar price to a traditional unit.
"Do you need a tankless water heater?" one commenter asked.
The original poster responded, "No, but it's equivalent price to a tanked one. This would presumably be more energy efficient."
Replies cautioned that the purchase price can give an incomplete picture.
One commenter responded bluntly: "New gas line and vent are probably required."
Another commenter explained why that can quickly get expensive, writing, "A normal tank water heater is 40K BTU. That tankless is 199K BTU. So 5x the gas."
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Several commenters said tankless systems can bring added requirements such as new venting or intake piping, a dedicated outlet, condensate handling, service valves, and yearly descaling. In their view, the unit may look inexpensive, but installation costs can climb.
Upgrading to a heat pump water heater is an excellent way to reduce household energy expenses.
More background
People in the plumbing forum said changing from a tank to a tankless setup is often not a straightforward replacement. One commenter pointed to plumbing differences and code requirements, and commenters said homes built around a tank water heater may need substantial upgrades before a tankless model can be installed.
Another commenter also said factors like climate, elevation, fuel type, and incoming water temperature can matter.
What can be done?
As one user put it, "Unless you need unlimited hot water, they rarely make sense financially over a tank version."
If you are considering switching to a heat pump water heater, Cala is an excellent option to check out. By heating water only when needed, Cala's customizable smart heat pump water heaters help homeowners cut their energy bills.
Where can I learn more?
While the initial purchase price of a tankless water heater may look attractive, ongoing upkeep and complex installation needs can quickly change your total budget. Evaluating these models means looking past the upfront cost to consider overall energy efficiency, potential long-term utility savings, and replacement costs.
• Homeowners weighing upgrades often find tankless pros and cons extend far beyond sticker price.
• For some households, money you can save depends on usage, fuel, and maintenance.
• On Reddit, plumbers and homeowners clashed over being charged boatloads for replacement options.
Even the least expensive water heater on the shelf can turn into a costly install. For anyone replacing an older unit, the bigger picture matters more than the price on the box.
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