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HONEST MATH · UPDATED JULY 2026

Tankless vs. Tank Water Heaters: The Real Math for NJ Homes

Quick answer

Tankless companies say you'll save a fortune. Call (201) 676-3099 or book a free estimate.

Tankless companies say you'll save a fortune. Tank guys say tankless is a scam. Both are selling something. Here's the math we actually run with customers — no commissions involved.

HEAD TO HEAD

TankTankless
Installed cost (NJ, typical)$1,800–$3,500$4,500–$8,500
Lifespan8–12 years20+ years
Efficiency edgebaselineup to 34% less energy (U.S. DOE)
Hot water supply40–75 gal, then waitendless, on demand
Floor space~9 sq ft0 — wall-mounted
Swap timeoften same-day1–2 days (gas + venting)

The 20-year math

Over 20 years you'll buy two tanks (roughly $5,000–$7,000 total with today's pricing) or one tankless ($4,500–$8,500) — plus the tankless saves up to a third on gas the whole time. For a family of 4+ in a gas home, tankless usually wins the long game. For a small household or an electric-only home, a quality tank is often the smarter check to write.

When we say "don't go tankless"

  • Your gas line can't feed it. Tankless units pull up to 199,000 BTU — 4× a tank. If your line needs a major upsize, that changes the math (we'll price it honestly).
  • You use very little hot water. The efficiency edge shrinks; payback stretches past 15 years.
  • You're selling within 2–3 years. Put the money where buyers see it — like the bathroom.

One warning either way: water heaters need a permit and inspection in NJ. Unpermitted installs surface at home sale and can void insurance claims. Ours are permitted, always — it's in the fixed price.

Need water heater replacement near you?

If you searched “water heater replacement near me” anywhere in New Jersey, that's us. First Call Contracting is based in Paramus and sends its own licensed crew to all 21 counties — written price before work starts, no deposit, a real person on the phone 24/7.

See water heater replacement →   Get my free estimate

Want both numbers for YOUR house?

Tank and tankless quoted side by side, in writing, free. No hot water right now? Often fixed same-day.

Or call Alex: (201) 676-3099

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