What does a tankless water heater cost to install?
The largest cost difference is usually not the wall-mounted unit—it is the gas, venting, condensate, recirculation, and sizing work around it.
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Explore →02Tankless water heaters
Understand flow rate, gas, venting, electrical, and recirculation before converting.
Explore →03Denver tankless conversion guide
Altitude, venting, gas supply, sizing, and recirculation in one decision guide.
Explore →The four biggest scope variables
Gas-line capacity, venting route, household flow demand, and recirculation design account for much of the difference between conversions.
- ✓Gas meter and line work
- ✓Venting and condensate
- ✓Unit sizing
- ✓Recirculation and access
Know the scope before the work starts
OneLine uses flat-rate quoting so the work, assumptions, and included items are visible before the job begins. The price we quote is the price you pay.
- ✓Written scope before work
- ✓Permit and inspection requirements identified
- ✓Connected electrical, plumbing, or HVAC work considered
- ✓No hourly surprise at the end
Tell us what is going on at your place.
Share the basics and we’ll route the request to the right service line. We'll text you ASAP to continue the conversation, then a One Line specialist will reach out as soon as possible.
- ✓Flat-rate scope before work
- ✓Electrical, HVAC, and water-heater team
- ✓Denver metro service area