Quick answer
A tankless water heater heats water on demand and gives effectively endless hot water while saving space and usually outlasting a tank; a traditional tank costs less up front and is simpler to install. The right choice depends on your household's peak hot-water demand, your budget, and your gas and venting setup. In hard-water North Texas, either type lasts longer with a water softener.
- Tankless = endless hot water, space savings, longer life, but a higher up-front cost.
- Tank = lower up-front cost and simpler install, with a limited reservoir and shorter lifespan.
- Tankless can need gas-line and venting upgrades; that affects the install price.
- Our hard water scales both types, a water softener protects either investment.
- The best fit depends on peak demand (how many fixtures run at once) and budget.
When this question matters
Your water heater is aging, you've run out of hot water one too many mornings, or it just failed and you're deciding what to replace it with. This is a 10-to-20-year decision that touches daily comfort and your utility bill, so it's worth understanding the trade-offs rather than simply swapping in whatever was there.
Why hard water changes the math here
North Texas is hard-water country, and mineral scale is the quiet enemy of every water heater. Scale builds up inside a tank and coats a tankless unit's heat exchanger, cutting efficiency and shortening life on both. That's why the tankless-vs-tank question in Collin County is really a three-part decision, heater type, plus whether to add a water softener that protects whichever one you choose.
How it works
How each one works
A tank water heater keeps 40 to 50 gallons hot around the clock, ready to use, simple and inexpensive, but it can run out during heavy use and it spends energy keeping water hot even when you're away. A tankless unit heats water only as it flows through, so it never runs out and doesn't waste standby energy, but it can only heat so many gallons per minute at once, which is why sizing to your peak demand matters.
Up-front cost vs. lifetime cost
A tank is cheaper to buy and install, which is why it's still the default. A tankless unit costs more up front, and may need a larger gas line and different venting, but it typically lasts longer and uses less energy, so the lifetime comparison narrows or flips depending on your usage and rates. Financing can make the up-front gap easier to manage when the long-run numbers favor tankless.
Sizing to how your household uses hot water
The deciding factor is often peak demand: how many showers, the dishwasher, and the laundry running at the same time. A large household with simultaneous demand may need a larger tankless unit or even two, while a tank's reservoir handles short bursts well as long as recovery time keeps up. Honest sizing, based on how your home actually uses hot water, prevents the disappointment of a unit that can't keep up.
What to watch for
If you ignore hard water
Installing any new water heater into untreated hard water starts the scale clock immediately. Scale insulates the heating surface, drops efficiency, and shortens life, and on tankless units it's the leading cause of premature trouble without regular flushing. Pairing a new heater with a water softener, and flushing a tankless on schedule, protects the investment.
If you size on price instead of demand
Buying the cheapest unit that fits, rather than the one sized to your peak hot-water demand, is how households end up with lukewarm showers when several fixtures run at once. Right-sizing, tank capacity and recovery, or tankless flow rate, is what determines whether the system actually meets your daily life.
Why trust Burnside
- Burnside installs and services both tank and tankless water heaters, sized to your household's demand.
- We handle the full job, heater, gas, venting, and water treatment, as one licensed, insured crew.
- Flat-rate pricing and 0% financing with approved credit through Wells Fargo.
Reviewed by the Burnside team, serving Collin County since 1958 · Last updated June 25, 2026
Common questions
Is a tankless water heater worth it in Texas? +
For many homes, yes, endless hot water, space savings, and a longer lifespan can outweigh the higher up-front cost, especially over time. The keys are sizing it to your peak demand and protecting it from our hard water with a softener and regular flushing. A tank remains a sound, lower-cost choice for many households.
How long does a water heater last in North Texas? +
It varies with water quality and maintenance, but hard water shortens the life of both tank and tankless units by building up scale. A water softener and routine maintenance, flushing a tank or a tankless heat exchanger, are the most reliable ways to reach the longer end of the range.
Does a tankless water heater need special installation? +
Often, yes, tankless units can require a larger gas line and different venting than the tank they replace, which affects the install cost. That's why a proper estimate looks at your existing gas and venting, not just the unit price. We'll spell out what your home needs before any work starts.