1. What is an Electric Furnace BTU Calculator?

Definition: This calculator converts electric power (in Watts) to BTU output for electric furnaces.

Purpose: It helps HVAC professionals and homeowners determine the heating capacity of electric furnaces.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — BTU output per hour (BTU/h)
• \( P \) — Electric power input (Watts)

Explanation: The formula converts electrical energy to thermal energy using the standard conversion factor of 3412 BTU per Watt-hour.

3. Importance of BTU Calculation

Details: Proper BTU calculation ensures adequate heating capacity for your space and efficient furnace operation.

4. Using the Calculator

Tips: Enter the electric power in Watts (found on furnace specifications). The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why 3412 as the conversion factor?
A: 1 Watt-hour equals exactly 3.412 BTU, so we use 3412 for Watt to BTU/h conversion.

Q2: Is this calculation accurate for all electric furnaces?
A: Yes, for pure resistance heating. Heat pumps would have different efficiency factors.

Q3: How do I find my furnace's wattage?
A: Check the nameplate on the furnace or product specifications (often listed in kW - multiply by 1000 for Watts).

Q4: Does this account for efficiency losses?
A: No, electric resistance heating is nearly 100% efficient, so losses are minimal.

Q5: How many BTU do I need for my space?
A: Rule of thumb is 20-30 BTU per sq ft, but consider insulation, climate, and other factors.