Tankless water heaters deliver hot water on demand and last 15–20 years; tank units cost less upfront and are simpler to replace. For most DFW homes with moderately hard water, the right choice depends on household size, gas line capacity, and whether annual descaling fits your maintenance habits.
The most honest starting point: neither type is universally better. Tank water heaters cost $800–$1,500 installed, heat a fixed supply of water, and typically last 8–12 years in DFW before sediment buildup shortens the lifespan. Tankless units cost $2,000–$4,000 installed, heat water as it flows, and routinely reach 15–20 years with annual descaling.
nnWhat DFW's Hard Water Means for Both Types
nPlano and the surrounding area has moderately hard water. In a tank unit, that hardness drops mineral sediment onto the tank floor every day. An annual flush removes it before it compacts and traps heat. In a tankless unit, the same minerals coat the heat exchanger — annual descaling keeps output, efficiency, and warranty coverage intact. Both types require maintenance; tankless maintenance is faster but more technical.
nnSizing Matters More Than Type
nA correctly sized tank or tankless unit handles any DFW home's hot water demand. Undersizing either type produces complaints — cold showers with tank, flow-rate limitations with tankless. Before choosing, count simultaneous hot-water draws (showers + dishwasher + washing machine at once) and size from there.
nnWhich to Choose
nChoose tankless if: you're doing a full remodel and the gas line upgrade is already budgeted; you want the 15–20 year lifespan; you're comfortable with annual descaling visits. Choose tank if: upfront cost is the priority; you want a straightforward replacement; your household's peak demand is modest. Either way, a Staggs Plumbing assessment gives you the real math for your home — call 682-284-0966.
