Cost to Install a Tankless Gas Water Heater

Updated: March 2018

Tankless Gas Water Heater Installation CalculatorZip Code
Heaters
Item detailsQtyLow  High
Gas Water Heater Cost 
Non-discounted retail pricing for: 8.5 gpm tankless gas water heater at 35F temperature rise. 0.92 energy factor. Digital controller. Requires natural gas supply and 3" vent connection at unit. 5 yr limited warranty.
1 heater$1,147.25$1,289.75
Gas Water Heater Labor, Basic 
Basic labor to install tankless gas water heater with favorable site conditions. Mount and secure new heater. Connect vent to existing vent ducting. Connect gas and water from existing supply lines. Leak and cycle test. Includes planning, equipment and material acquisition, area preparation and protection, setup and cleanup.
1 heater$1,147.25$1,289.75
Gas Water Heater Job Supplies 
Cost of related materials and supplies typically required to install tankless gas water heater including: connectors, fittings and mounting hardware.
1 heater$1,147.25$1,289.75
Gas Water Heater Equipment Allowance
Job related costs of specialty equipment used for job quality and efficiency, including: Pipe cutting and threading, tubing cutter, brazing kit and pipe wrenches. Daily rental. Consumables extra.
1 heater$1,147.25$1,289.75
Option: Remove Water Heater
Detach and turn off connections. Drain unit. Remove from premises. Disposal costs/fees not included.
1 heater$1,147.25$1,289.75
Gas Water Heater Debris Disposal
Costs to load and haul away old materials, installation waste and associated debris.
1 heater53.1562560.46875
 Unused Minimum Labor
Balance of 2 hr(s) minimum labor charge that can be applied to other tasks.
   
Totals - Cost To Install Tankless Gas Water Heater   
Average Cost per Heater  
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For a basic project in zip code 47474 with 1 heater, the cost to Install a Tankless Gas Water Heater starts at $1,748 - $2,034 per heater. Actual costs will depend on job size, conditions, size options.

To estimate costs for your project:

1. Set Project Zip Code Enter the Zip Code for the location where labor is hired and materials purchased.

2. Specify Project Size and Options Enter the number of "items" required for the project.

3. Re-calculate Click the "Update" button.


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Unit Costs: How Pros Price

Unlike sites which blend pricing from dissimilar jobs, homewyse estimates are based on the Unit Cost method. This method uses job specific detail for superior pricing accuracy and transparency - and has become an industry standard through publications and guidance of leading trade associations, including: PHCCA, the NKBA, the NECA, the AIA, and the ASPE.


Cost to Install a Tankless Gas Water Heater - Notes and General Information

These estimates are for BASIC work performed in serviceable conditions by qualified trade professionals using MID GRADE materials. Work not mentioned on this page and/or work using master craftsman, premium materials and project supervision will result in HIGHER COSTS! Explore the full range of gas tankless water heater new installation labor options and material prices here.

These estimates are NOT substitutes for written quotes from trade professionals. Homewyse strongly recommends that you contact reputable professionals for accurate assessments of work required and costs for your project - before making any decisions or commitments.

The cost estimate includes:

  • Costs for local material / equipment delivery to and service provider transportation to and from the job site.
  • Costs to prepare the worksite for Tankless Gas Water Heater Installation, including costs to protect existing structure(s), finishes, materials and components.
  • Labor setup time, mobilization time and minimum hourly charges that are commonly included for small Tankless Gas Water Heater Installation jobs.

The cost estimate does NOT include:

  • Costs for removing, relocating, repairing, or modifying existing framing, surfacing, HVAC, electrical, and plumbing systems - or bringing those systems into compliance with current building codes.
  • Costs for testing and remediation of hazardous materials (asbestos, lead, etc).
  • General contractor overhead and markup for organizing and supervising the Tankless Gas Water Heater Installation. Add 13% to 22% to the total cost above if a general contractor will supervise this project.
  • Sales tax on materials and supplies.
  • Permit or inspection fees (or portion thereof) required by your local building department for your overall project.

Cost to Install a Tankless Gas Water Heater - Unit Price References

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