Tankless vs. Tank Water Heaters: Which One Actually Saves You Money?
The tankless-versus-tank debate usually comes down to one question: are you optimizing for the lowest upfront cost, or the lowest cost over the life of the unit?
Traditional tank water heaters are cheaper to buy and install, and most plumbers can swap one in a few hours. Their tradeoff is a shorter lifespan — typically 8-12 years — and standby energy loss from keeping a full tank hot around the clock.
Tankless units cost more upfront, especially if your home needs new gas lines or venting to support one. In exchange, they last significantly longer, take up less space, and only heat water on demand, which can meaningfully lower utility bills in homes with steady hot water use.
For most homeowners planning to stay in their house for 10+ years, the math tends to favor tankless. For a quick like-for-like replacement in a home you might sell soon, a tank unit is often the more practical choice.