Tankless vs. Traditional Water Heaters: Choosing for a Valley Home

Replacing a water heater is one of the bigger plumbing decisions a Van Nuys homeowner makes. The choice between tankless and traditional tank models affects your energy bill, how much hot water you have when you need it, and long-term maintenance. Here is how they compare.

Traditional tank water heaters

How they work

They store a set volume of heated water, commonly 40 to 75 gallons, ready whenever you open a tap.

Pros

• Lower upfront cost than most tankless systems.
• Simple to service and replace.
• Handles several simultaneous demands, such as two showers at once, when properly sized.

Cons

• Standby heat loss means higher energy use.
• Typical lifespan of roughly 8 to 12 years, shorter where hard water scale builds up.
• A tank can eventually leak or rupture and flood the area around it.

Tankless (on-demand) water heaters

How they work

They heat water as it flows through the unit, with no storage tank.

Pros

• Hot water does not run out while the unit is within its flow capacity.
• The U.S. Department of Energy says demand-type heaters can be roughly 24 to 34 percent more efficient in homes with modest hot water use.
• Lifespan of 20 years or more with proper maintenance.
• Wall-mounted, which frees floor space.

Cons

• Higher upfront cost.
• May require gas line, venting or electrical upgrades.
• Needs regular descaling, which matters in the Valley's hard water.