The short answer on tankless water heater cost
A tankless unit generally costs more to install than a like-for-like tank, because it needs more from the house. Gas models need a larger gas supply and special venting. Electric models need heavy wiring and breaker capacity. Whether that extra up-front cost pays back depends on how much hot water you use and how long you stay.
If a quote looks surprisingly low, check what is missing. Vent parts, a condensate drain, a gas line upgrade, a permit and a flush valve kit are the usual gaps.
The factors that move a tankless quote
These are the five items that most often explain the difference between two quotes for the same house.
Home insurance typically responds to sudden damage and not to wear or neglect, so a heater replaced for age is normally on you. A water heater replaced because it wore out is normally your cost, and a failed one that floods the house may be covered. Ask your carrier.
Questions to ask each contractor
- Is the gas line or breaker upgrade included, or priced as extra?
- What is the vent material, and how many feet of run?
- Does the quote include a flush valve kit and the first flush?
- Is a permit pulled, and who schedules the inspection?
- What happens to the old tank, and is the haul-away listed?
- What does the manufacturer cover, and does installation by a licensed contractor affect it?
| Item | Tank replacement | Tankless install |
|---|---|---|
| Unit | Lower at retail | Higher at retail |
| Gas line | Usually reuses the existing line | May need a larger supply line |
| Venting | Often reuses the existing flue | Typically new vent pipe and a wall exit |
| Electrical | Little change for gas | New circuit for electric, power for a gas unit's controls |
| Maintenance | Tank flush and anode check | Periodic descale flush |
| Space | Floor footprint | Wall mount, smaller footprint |
Ready to compare real numbers?
Call and tell the dispatcher your fuel, the age of the current heater and where it sits. We can set up a same-day appointment when available, with a clear price before work starts.
Tap water, permits and code in Winslow Township
The Township's Department of Municipal Utilities (609-567-0700) says its water comes from nine wells in the Cohansey and Mount Laurel-Wenonah aquifers, plus one in the Piney Point aquifer, and from New Jersey American Water through an interconnection.
The Township's water quality report does not publish a hardness figure, so test your tap and ask the DMU for the annual report. That test tells you whether to price a scale-control add-on or a regular flush.
The code your installer works to is the 2021 National Standard Plumbing Code Illustrated. Whether your swap needs a permit is up to the Winslow Construction Office, at 609-567-0700, option 5. The inspector's window is Tuesday to Thursday, 8am to 1pm, so build the install date around it.
Only a master plumber, an authorized plumbing contractor or their W-2 employees may do the work, and you can verify a license number with the State Board of Examiners of Master Plumbers.
Ask each bidder to name the model, the input rating and the vent type in writing. With those three facts, you can look up the manual, confirm the requirements and see whether any two quotes are truly the same product.
When tankless is the wrong call
If your gas supply is limited, your vent path is long and awkward, or your hot water use is light, a conventional tank may be the better value. A tank is also easier to service in a house where the water heater sits in a tight closet.
Before you commit, ask for a plain comparison of a tank and a tankless unit for your house. It should list the up-front cost of each, the extra work the tankless needs, and the maintenance each one calls for. If the installer cannot explain where the savings would come from, keep shopping.
Households with several showers running at once, a large soaking tub or a laundry room far from the heater benefit from tankless more. Ask your installer to size the unit to your fixtures, not to a generic chart.
If you are not sure whether to repair, replace or switch type, a visit to see your existing setup answers the question faster than a phone estimate. See our pages on tankless water heater installation and water heater installation for how we approach each job.
A note for Sicklerville and Cedar Brook homeowners
Houses in Sicklerville (08081) and Cedar Brook (08018) vary in age and layout, so a quote for your neighbor's house will not fit yours.
Levitt & Sons built thousands of homes in Sicklerville in the 1970s, and a house of that age may have an older gas line, a narrow chimney or a tight utility closet. Those details can change the install scope.
We also dispatch to Gloucester Township and Berlin Borough, and the same questions apply there.
Questions Winslow homeowners ask
The unit costs more, and the house often needs changes. A bigger gas line, new vent pipe or a heavier electrical circuit can add labor and parts that a tank swap does not require.
It can, because it heats water only when you use it. How much you save depends on your usage, your fuel price and your current heater, so ask your installer to explain the assumptions.
The Township's water quality report does not publish a hardness figure, so we do not state one. Test your tap, ask the Department of Municipal Utilities at 609-567-0700 for the annual report, and decide on a flush kit based on your result.
The Construction Office decides, so call 609-567-0700, option 5, and ask what it wants for a gas or electric water heater.
Maker information varies, and your results depend on water quality and flushing. Ask the manufacturer for the stated service life and the warranty terms for your model.
Put them side by side and check venting, gas line, electrical work, permit, flush kit, haul-away and warranty. A lower quote that leaves out vent parts or a gas upgrade is not really lower.
Sources and standards
Facts on this page come from these public sources. Check local rules with the office named in each.