Water Heater BTU Sizing: 2.5 gpm at 50°F rise
Specific conversion page with reference context, calculator, and nearby values.
On this page
2.5 gpm at 50°F rise converts to
62,500 BTU/h
Use this as a quick reference for Water Heater BTU Sizing.
Value Details
Input: 2.5 gpm at 50°F rise
Output: 62,500 BTU/h
Browse all reference values for Water Heater BTU Sizing
tempRiseF: 50 | kw: 18.32
Water Heater BTU Sizing Calculator
Estimate required heater input for a target hot-water flow and temperature rise.
Required Heater Input
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Nearby Reference Values
| Demand Scenario | Heater Input | kW Equivalent |
|---|---|---|
| 2 gpm at 60°F rise | 60,000 BTU/h | 17.58 |
| 2 gpm at 70°F rise | 70,000 BTU/h | 20.51 |
| 2 gpm at 80°F rise | 80,000 BTU/h | 23.45 |
| 2.5 gpm at 30°F rise | 37,500 BTU/h | 10.99 |
| 2.5 gpm at 40°F rise | 50,000 BTU/h | 14.65 |
| 2.5 gpm at 50°F rise | 62,500 BTU/h | 18.32 |
| 2.5 gpm at 60°F rise | 75,000 BTU/h | 21.98 |
| 2.5 gpm at 70°F rise | 87,500 BTU/h | 25.64 |
| 2.5 gpm at 80°F rise | 100,000 BTU/h | 29.31 |
| 3 gpm at 30°F rise | 45,000 BTU/h | 13.19 |
| 3 gpm at 40°F rise | 60,000 BTU/h | 17.58 |
Frequently Asked Questions
Common questions about Water Heater BTU Sizing, formulas, and expected usage.
How do you calculate water-heater BTU/h requirement?
A common estimate is BTU/h = 500 × flow (gpm) × temperature rise (°F).
Why include heater efficiency?
Input capacity must be higher than delivered heat when efficiency is below 100%, so efficiency adjusts required BTU/h input.
What is temperature rise in this context?
Temperature rise is the difference between desired outlet water temperature and incoming cold-water temperature.
Is this enough for final equipment selection?
Use this for preliminary sizing; final selection should also consider peak demand profile, recovery, storage, and manufacturer data.
Methodology and Review
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Use this page as a fast lookup reference, then confirm final project values using applicable standards and manufacturer documentation.