Water Heater Decision
50-Gallon Tank vs. 80-Gallon Tank
The 2026 hot water decision tree.
Spec
50-Gallon Tank
80-Gallon Tank
Typical 2026 cost
$1,400–$2,800 installed
$2,200–$4,200 installed
Lifespan
10–13 years
10–13 years
Performance
FHR ~75 gallons/hour (3–4 person home)
FHR ~110 gallons/hour (5+ person home or 2 baths simultaneous)
The Verdict
50-gallon fits 90% of single-family homes. 80-gallon is for large families, multiple simultaneous baths, or hybrid units sized down.
Key Facts
- First Hour Rating (FHR) matters more than tank size
- 80-gallon hybrid heat pumps are the most common HPWH size
- Standby loss is 8–12% higher on the 80-gallon
- Most homes overspend on tank size
Which Should You Pick?
Pick 50-Gallon Tank if you have:
- 1–4 person households with single primary bathroom
- tight utility closets
- budget-focused replacements
Pick 80-Gallon Tank if you have:
- 5+ person households or 2+ simultaneous showers
- large soaking tubs (75+ gallons)
- hybrid HPWH installs (most efficient at 80gal)
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