Gas water heaters heat water faster and cost less per month to run, while electric water heaters cost less to buy and install and tend to last a couple of years longer. The better choice depends on the fuel line your house already has, how much hot water your household uses, and your local utility rates.

Most people replace a water heater maybe three times in their life. You do not think about the tank in the garage until the shower runs cold on a Tuesday morning. Then you have an afternoon to decide between an electric model and a gas model.

Both heat water well. They get there differently, and that difference follows you on every utility bill for the next decade. The comparison comes down to three things: what you pay upfront, what you pay every month, and how much hot water you get at once.

What Is the Difference Between an Electric and a Gas Water Heater?

How does an electric water heater work?

An electric unit sends current through one or two heating elements mounted inside the storage tank. The elements warm the water directly, and a thermostat holds the water temperature where you set it. No flame, no flue, no combustion air. That is why an electric water heater fits in a closet, an attic, or a narrow utility space where a gas unit would never pass code.

Almost all the electricity going into the tank ends up as heat in the water. Efficiency at the appliance and cost at the meter are two different things, though.

How does a gas water heater work?

A gas water heater burns natural gas in a burner underneath the tank. Hot exhaust travels up a flue through the center of the storage tank, and a heat exchanger pulls warmth out of it along the way. The exhaust vents outside. Older units keep a standing pilot light burning around the clock. Newer gas models use electronic ignition instead.

Burning a fossil fuel inside a house comes with rules. A gas heater needs proper venting, combustion air, and a gas line sized for the load. Bad venting is how carbon monoxide gets into living space.

Electric vs gas at a glance

	Electric water heater	Gas water heater
Recovery speed	Slower	Faster
Upfront cost	Lower	Higher
Monthly operating costs	Higher	Lower
Venting required	No	Yes
Hot water during an outage	No	Often
Typical lifespan	10-15 years	8-12 years

Which Costs More, Electric or Gas?

What drives installation cost?

An electric water heater wins on upfront cost. The unit is cheaper, and the install is simpler, with no venting or gas piping.

Gas brings additional costs when a house is not already set up for one:

• Running a new gas line to the water heater location adds labor and materials, and the line has to be sized correctly for the appliance.
• Venting through a wall or roof is required, and older flues sometimes have to be replaced or resized before a new gas unit can go in.
• Electrical work lands on the electric side instead, because an electric model needs a dedicated 240-volt circuit and breaker.

Replacing like for like is the cheapest path either way. Switching fuel types is where the bill grows.

Which one has lower operating costs?

Natural gas costs less per unit of heat than electricity across most of the United States, and Texas is no exception. A gas unit generally costs less to run month to month even though it is less efficient at the appliance than an electric one.

Water heating takes up approximately 18 percent of the energy a typical home uses, second only to heating and cooling. Over a 12-year lifespan, the gap in energy costs between a gas heater and a standard electric heater can outrun whatever you saved at installation.

Run the numbers against your own utility rates before you decide, since retail electric plans in North Texas vary widely.

Do heat pump water heaters change the math?

Yes, and most homeowners have never heard of them. A heat pump water heater is an electric model that moves heat out of the surrounding air into the tank instead of making it with a heating element. These units use 60 to 70 percent less energy than standard electric resistance models, saving more than $340 a year on average.

They cost more upfront and need a warm, open space with air moving around them. Federal standards taking effect in 2029 will push more than half of newly manufactured electric storage water heaters toward heat pump technology, up from 3 percent today. If energy efficiency and long-term savings matter more to you than upfront cost, a certified heat pump water heater deserves a look.

Which Water Heater Is Right for Your Home?

When does an electric water heater make sense?

• Your home has no gas service: Adding a gas line and a vent to an all-electric house rarely pays for itself on a water heater alone.
• Space is tight: Closets, attics, and interior utility rooms take an electric unit without any venting.
• Smaller households do fine on electric: Two or three people with staggered usage patterns rarely push a properly sized electric tank past its limits.
• You want the longer runway: Electric tanks commonly reach the 10-15 year mark, a little past what many gas units deliver.

When does a gas water heater make sense?

• You already have natural gas at the house: A like-for-like replacement keeps the install simple and the monthly energy costs lower.
• Large families need fast recovery: A gas burner reheats a tank of cold water faster than a heating element does, which matters when four people shower before seven in the morning.
• Power outages are a concern: Many gas models with standing pilot lights keep making hot water when the electricity goes out.

Household size drives this decision more than anything else, and larger households lean gas.

What about tankless options?

A tankless system heats water on demand instead of holding it in a tank. There is no standby loss, and the hot water does not run out.

Gas tankless units handle whole-home demand comfortably. An electric tankless water heater pulls a large amount of power, and older homes often need an electrical service upgrade before one can be installed. A tankless heater costs more upfront, and hard water makes descaling part of regular maintenance. With proper maintenance, a tankless unit outlasts a tank water heater by a wide margin.

Lasiter and Lasiter: Your Partner in Water Heater Repair and Replacement

Making an informed decision on a new water heater is easier with someone who has installed both kinds in houses like yours. Lasiter and Lasiter Plumbing has been doing that around Dallas-Fort Worth since 1974, and our service plumbers came up on the new construction side. They understand how a home’s whole plumbing system was built, not only the appliance sitting in front of them. We handle water heater repair and replacement, tankless conversions, and hot water recirculating systems throughout Colleyville, Grapevine, Southlake, Keller, Trophy Club, and Flower Mound.

We do not quote water heaters over the phone. We come look at the space, the venting, the gas line, and the electrical, then give you a number we stand behind. Call today or request a free estimate online. If your water heater has already quit, our 24-hour emergency service is available.

Frequently Asked Questions

Which lasts longer, an electric or gas water heater?

Electric tanks typically run 10-15 years. Gas units land closer to 8 to 12. Hard water shortens both, so an annual flush matters more in North Texas than most places.

Is a gas water heater safe?

A properly installed and vented gas water heater is safe. The risk comes from bad venting, a cracked heat exchanger, or a gas leak, and those conditions are what let carbon monoxide into a house. Put a carbon monoxide detector near the bedrooms and have the unit inspected once a year.

Can I switch from an electric water heater to gas?

Yes, if natural gas already serves the house. The job includes running and sizing a gas line, adding venting, and retiring the old 240-volt circuit. Plan on a bigger project than a straight swap.

Does a gas water heater work during a power outage?

Gas models with a standing pilot light keep heating water without electricity. Units with electronic ignition or a powered vent will not.

What size water heater does my household need?

Size by first-hour rating and household size rather than tank gallons alone. A four-person home often lands on a 50-gallon gas unit, or a larger electric one to make up for slower recovery.