Tankless Water Heater Installation In Columbus

Most installs run $1,400 to $5,600 all in. Electric units land at $1,400 to $3,000; gas units at $2,100 to $5,600. Labor alone is $600 to $2,500 for three to ten hours of work. Prices sit in these ranges. The extras drive the spread: gas line upsizing $350 to $2,000, new venting $100 to $600, electrical panel upgrade $850 to $4,000, and old unit removal up to $500. Permits and inspection fees are usually quoted separately on top of that.

Two numbers decide it: peak simultaneous flow in GPM and temperature rise. Add up fixtures you’d run at once: two showers and a sink is about 5.5 GPM. Then subtract your coldest incoming groundwater temperature from 120°F. That gap matters more than people expect: a unit rated 5 GPM at a 35-degree rise drops to about 3.2 GPM at a 50-degree rise. Have installers run the calculation rather than sizing off house square footage. Undersizing produces cold water bursts.

Gas for whole-home use in most cases. Gas units deliver 5 to 11 GPM and work in any climate; electric tops out around 3 to 5 GPM and struggles where incoming water runs cold. Electric costs less to install when the panel has capacity, no venting, and no gas line. But a 36 kW electric unit draws roughly 150 amps at 240V, which many older panels can’t support. Plumbers should check panel capacity before quoting an electric unit at all.

Because the infrastructure changes. A tank sips gas slowly; a tankless unit fires hard on demand, so the half-inch gas line that fed the tank usually needs upsizing to three-quarter inch, $350 to $2,000. The old vent can’t be reused either, since tankless units require sealed direct venting at $100 to $600. Electric conversions may need a panel upgrade instead. The cheapest tankless install is a like-for-like swap. Plumbers price conversions accordingly, so ask for the itemized breakdown.

A like-for-like tankless swap takes three to four hours. A standard tank-to-tankless conversion runs five to six hours, including removal, plumbing changes, and venting. Complex jobs with gas line upsizing, panel work, or difficult vent routing take seven to eight hours or stretch into a second day. Permit review happens before any of it. Most plumbers can schedule the work within a week, but inspection follows on a separate visit. Plan for a day without hot water.

Yes, and skipping it is what kills them early. Annual descaling costs $100 to $350 and flushes mineral scale out of the heat exchanger. In hard water areas above roughly 7 grains per gallon manufacturers often specify every 6 to 12 months, and neglect can void the warranty. A water softener helps considerably. Beyond that, the inlet filter needs cleaning and the venting checked. Plumbers often sell annual maintenance plans covering all of it. Ask what’s actually included.

It depends on how long you’re staying. Tankless units use 24% to 34% less energy for low-usage homes and last 15 to 20 years versus 8 to 12 for a tank, so break-even typically arrives around year eight to ten. Past that, the savings are real. If you’re selling within five years, a conventional tank usually makes better financial sense. Ask plumbers to quote both a tank and a tankless so you can compare real numbers for your house.