What Makes Tankless Installation Different
A tankless water heater fires a high-BTU burner on demand — gas models typically draw 150,000–199,000 BTU, compared to 36,000–40,000 for a tank heater. That means your existing ¾-inch gas line may need to be upsized to 1 inch or larger. Venting requirements are also different — most tankless units require direct vent (PVC flue to exterior) rather than the B-vent of a standard tank. Skipping these steps means the unit underperforms or trips on error codes.
Sizing It for Your Home
Tankless units are sized by flow rate (gallons per minute) and temperature rise (how much the incoming cold water needs to be heated). DFW groundwater temperature runs cooler in winter, which reduces effective output. We calculate the right unit size for your household’s simultaneous demand — shower, dishwasher, washing machine — so it keeps up year-round.
Tank-to-Tankless Conversion
Converting from a tank includes: removing the old unit, upgrading the gas line if needed, running new venting, installing the tankless unit, connecting water lines with isolation valves and a flush kit (required for scale maintenance in DFW’s moderately hard water), and setting up the unit and testing flow. Permit required — we handle it.