Which Water Heater To Buy Now

: You measure by "flow rate" (Gallons Per Minute or GPM). A unit like the Rinnai RU180iN offers up to 10 GPM, which is enough to run two showers and a dishwasher simultaneously. 4. Top Brands to Watch in 2026

: The "efficiency king" of 2026. These pull heat from the surrounding air to warm the water. They can be 3–4 times more efficient than standard electric tanks, often paying for themselves in energy savings within a few years. 3. Sizing Your System which water heater to buy

Buying a unit that's too small leads to cold showers; buying one too large wastes money. : You measure by "flow rate" (Gallons Per Minute or GPM)