Basic
$1,122 – $3,124 each
Standard-flow tankless unit matching the existing fuel and vent type, reconnected to gas, vent and water lines, new isolation valves

Supply and install one whole-house tankless water heater (like-for-like swap, unit and labor); new gas line, venting or electrical upgrades push higher.
Tankless Hot Water System in Boise, Idaho typically costs $1,320 to $3,676 each as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Prices in Boise are 6.0% lower than the national average for tankless hot water system.
National average: $1,400 – $3,900 each
$1,122 – $3,124 each
Standard-flow tankless unit matching the existing fuel and vent type, reconnected to gas, vent and water lines, new isolation valves
$1,320 – $3,676 each
Higher-flow tankless unit, same fuel and vent type, isolation valve kit with pressure relief valve, inlet sediment filter
$1,649 – $4,595 each
High-flow tankless unit with built-in recirculation pump, isolation valve kit, scale-prevention filter and app-capable controller
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $605 – $1,685 | each |
| Labor | labor | $446 – $1,242 | each |
| Supplies & Other | supplies | $161 – $449 | each |
| Equipment & Disposal | equipment | $108 – $300 | each |
BuildX Pro researches and reviews the national price range for Tankless Hot Water System, then adjusts it to your ZIP code for local labor and material costs using the public data below. Last checked Nov 2026.
Connect with local tankless hot water system contractors in Boise for personalized quotes based on your specific project.