1. What is a Shop Heater Sizing Calculator?

Definition: This calculator estimates the required heating capacity (in BTU/h) for a shop space based on its volume and heating factor.

Purpose: It helps determine the appropriate heater size to maintain comfortable temperatures in workshop or garage spaces.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( S \) — Heater size (BTU/h)
• \( V \) — Shop volume (cubic feet)
• \( F \) — Heating factor (BTU/h per cubic foot)

Explanation: The shop volume is multiplied by a heating factor that accounts for insulation quality and desired temperature rise.

3. Importance of Proper Heater Sizing

Details: Correct sizing ensures energy efficiency, proper heating, and prevents equipment strain from undersizing or oversizing.

4. Using the Calculator

Tips: Enter the shop volume in cubic feet and heating factor (default 5 BTU/h ft³ for moderate insulation). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How do I determine my shop volume?
A: Multiply length × width × height of your space in feet to get cubic feet.

Q2: What heating factor should I use?
A: Use 3-4 for well-insulated spaces, 5 for moderate insulation, and 6-7 for poor insulation or very cold climates.

Q3: Does this account for ceiling height?
A: Yes, since volume calculation includes height. Taller spaces may need higher factors.

Q4: What about garage doors or frequent openings?
A: For spaces with frequent door openings, increase the factor by 1-2 BTU/h ft³.

Q5: How do I convert BTU/h to kW?
A: Divide BTU/h by 3412 to get kilowatts (kW).