When your water heater needs replacing, you've got a choice: stick with a traditional tank or upgrade to tankless. Both have real pros and cons, and the right answer depends on your household, budget, and priorities. Here's an honest comparison.
Tank Water Heaters — The Basics
A tank water heater stores 40–75 gallons of hot water at all times. When you turn on a hot faucet, water flows from the tank and cold water enters to be heated. The unit cycles on and off throughout the day to keep the stored water at temperature.
Pros: Lower upfront cost ($800–$2,000 installed). Simple, proven technology. Easy to install — most replacements are straightforward swaps. Works well for homes with predictable hot water needs.
Cons: Takes up space (a 50-gallon tank is about 5 feet tall and 2 feet wide). Standby energy loss — you're paying to keep water hot 24/7, even when you're at work or sleeping. Limited supply — once the tank is empty, you're waiting 30–60 minutes for recovery. Shorter lifespan (8–12 years).
Tankless Water Heaters — The Basics
A tankless (on-demand) water heater has no storage tank. When you open a hot faucet, cold water flows through a heat exchanger and is heated instantly. The unit only runs when hot water is being used.
Pros: Endless hot water — it never "runs out" because it heats on demand. Compact size (about the size of a small suitcase, wall-mounted). Energy savings of 8–34% depending on usage, because there's no standby loss. Longer lifespan (15–20 years).
Cons: Higher upfront cost ($2,500–$5,000 installed). May require a gas line upgrade or larger electrical service. Flow rate is limited — running the shower, dishwasher, and washing machine simultaneously can exceed capacity. Retrofitting from tank to tankless often involves additional plumbing and venting work.
The Cost Question
If you're comparing strictly on upfront cost, a tank water heater wins every time. A standard 50-gallon gas tank installed runs around $1,200–$2,000 in Central Texas. A comparable tankless unit installed runs $3,000–$5,000.
But if you factor in energy savings ($100–$200/year) and the longer lifespan, the lifetime cost of ownership is often similar. The tankless unit also adds more resale value to your home.
Our Recommendation
For most Central Texas homeowners, a high-efficiency tank water heater is the best value. The upfront savings are significant, modern tanks are much more efficient than units from 10 years ago, and the installation is straightforward.
Go tankless if: you have a larger household that frequently runs out of hot water, you want to reclaim the floor space, or you're building new and can plan the gas/electrical requirements from the start.
Either way, the key is professional installation with proper sizing. An undersized unit — tank or tankless — will underperform regardless of technology. At Kimco, we'll assess your household's hot water demand and recommend the right size and type for your specific situation.