HONEST MATH · UPDATED JULY 2026 · 5 MIN READ
Tankless vs. Tank Water Heaters: The Real Math for NJ Homes
By Johnny Shater, owner · Garden State Quality, Paramus NJ
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
Tank
Tankless
Installed cost (NJ, typical)
$1,800–$3,500
$4,500–$8,500
Lifespan
8–12 years
20+ years
Efficiency edge
baseline
up to 34% less energy (U.S. DOE)
Hot water supply
40–75 gal, then wait
endless, on demand
Floor space
~9 sq ft
0 — wall-mounted
Swap time
often same-day
1–2 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.
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.
>> GET MY TWO QUOTES <<
Or call Johnny: (201) 787-6858