A standard gas tank water heater costs less to install; a tankless unit costs more up front but lasts longer, takes less space and never runs out of hot water. In Houston, hard water and garage or attic installations add a few local twists.
Here is how the two compare.
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Head-To-Head
Factor
Tank (40 to 50 gal)
Tankless
Typical installed cost
About $1,200 to $2,500
About $3,000 to $5,500
Lifespan
8 to 12 years
15 to 20 years
Energy use
Keeps water hot around the clock
Heats only on demand
Hot water supply
Can run out
Continuous, limited by flow rate
Space
Large footprint
Wall-mounted
Maintenance in hard water
Annual flush
Annual descaling
Gas line
Standard line usually fine
Often needs a larger line and new venting
When A Tank Makes Sense
Tight budget or a straight swap of a failed unit
Smaller household with modest hot water use
Existing gas line or venting would be costly to upgrade
When Tankless Makes Sense
Larger families who run out of hot water
You plan to stay in the home 10 years or more
You want to free up garage or closet space
You are remodeling and can upgrade gas and venting at the same time
The Houston Factor: Hard Water
Houston’s moderately hard water leaves mineral scale in both types. Tankless units need descaling once a year or they lose efficiency and throw error codes. A water softener or scale filter helps either system last longer.
Conclusion
Tank heaters win on upfront cost; tankless wins on lifespan, space and endless hot water. Get quotes for both from a licensed plumber, see our Top Water Heater Repair Services In Houston.
Need a plumber in Houston now?
Call to get connected with an available local plumber for leaks, clogs, water heaters and repairs.
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