1. What is a BTU per Watt Calculator?

Definition: This calculator converts electrical power in watts to heat output in British Thermal Units per hour (BTU/h).

Purpose: It helps determine the heat output of electrical devices and is useful for HVAC sizing and energy efficiency calculations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Heat output (BTU per hour)
• \( P \) — Electrical power (Watts)
• 3.412 — Conversion factor (BTU/h per watt)

Explanation: Every watt of electrical power produces approximately 3.412 BTU of heat per hour.

3. Importance of BTU per Watt Calculation

Details: This conversion is essential for proper HVAC system sizing, electrical load calculations, and understanding energy efficiency of electrical devices.

4. Using the Calculator

Tips: Simply enter the power in watts to get the equivalent heat output in BTU/h. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why 3.412 specifically?
A: This is the exact conversion factor between watts and BTU/h (1 watt = 3.41214 BTU/h).

Q2: Is this conversion accurate for all devices?
A: Yes, for electrical devices where all energy is converted to heat. For devices that do work (like motors), some energy isn't converted to heat.

Q3: How can I use this for HVAC calculations?
A: Calculate the heat output of all electrical equipment in a space to determine cooling requirements.

Q4: What about efficiency factors?
A: For devices with efficiency ratings, multiply the result by the efficiency factor (e.g., 0.85 for 85% efficient).

Q5: Can I convert BTU back to watts?
A: Yes, divide BTU/h by 3.412 to get watts.