: Most tanks offer 6, 9, or 12-year warranties. Units with longer warranties often have larger heating elements or thicker insulation.

: Generally has the lowest upfront cost and is the easiest to install since it doesn't require venting. However, electric rates are often higher than gas, making them more expensive to operate over time.

Modern technology offers several ways to heat water, each with distinct pros and cons.

: Higher-end models allow you to set "vacation modes" or monitor energy usage via smartphone apps.

: Look for "powered" anode rods or heavy-duty magnesium rods, which protect the tank from corrosion and extend its lifespan.

: The most common type, featuring an insulated tank that keeps a reservoir of water hot and ready.

: These units heat water faster than electric models and typically cost less to run. They require a gas line and proper venting through a chimney or wall.