1. What is a BTU Calculator?

Definition: This calculator estimates the British Thermal Units (BTU) required to heat water based on mass and temperature change.

Purpose: It helps HVAC professionals, engineers, and DIYers determine heating requirements for water-based systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( BTU \) — British Thermal Units
• \( m \) — Mass of water (pounds)
• \( \Delta T \) — Temperature change (°F)

Explanation: The mass of water is multiplied by the desired temperature change to calculate the required energy.

3. Importance of BTU Calculation

Details: Proper BTU estimation ensures adequate heating capacity, energy efficiency, and proper system sizing.

4. Using the Calculator

Tips: Enter the water mass in pounds and desired temperature change in °F. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the specific heat capacity (c) not included?
A: For water, c=1 BTU/lb·°F, so it's omitted from this simplified calculation.

Q2: How do I calculate for other liquids?
A: Multiply the result by the liquid's specific heat capacity (c).

Q3: What's a typical water mass for calculations?
A: 1 gallon of water weighs approximately 8.34 pounds.

Q4: How does this relate to heating systems?
A: The result indicates how many BTUs your heater must provide to achieve the temperature change.

Q5: Does this account for heat loss?
A: No, consider adding 10-20% to the calculated BTU for system losses.