1. What is a Garage Heater Sizing Calculator?

Definition: This calculator estimates the required heating capacity (in BTU/h) for a garage based on its size, climate factors, and insulation quality.

Purpose: It helps homeowners and professionals select an appropriately sized garage heater for efficient and effective heating.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Required heater capacity (BTU/h)
• \( A \) — Garage area (square feet)
• \( BTU/ft² \) — Heating requirement per square foot
• \( F_g \) — Adjustment factor for insulation and climate

Explanation: The base heating requirement is calculated by multiplying area by BTU per square foot, then adjusted for specific conditions.

3. Importance of Proper Heater Sizing

Details: Correct sizing ensures efficient operation, prevents energy waste, and maintains comfortable temperatures without overworking the heater.

4. Using the Calculator

Tips: Enter the garage area in square feet, BTU requirement per square foot (default 30), and adjustment factor (default 1.2). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the typical BTU per square foot?
A: For garages, 30 BTU/ft² is standard, but this can range from 20 (well-insulated) to 50 (poor insulation/cold climates).

Q2: How do I determine the adjustment factor?
A: Use 1.0 for well-insulated garages, 1.2 for average, and 1.5+ for poorly insulated spaces or very cold climates.

Q3: What if my garage has high ceilings?
A: Multiply the area by (ceiling height / 8) to account for additional volume, or increase the adjustment factor.

Q4: Should I round up the calculated BTU?
A: Yes, it's recommended to round up to the nearest standard heater size (e.g., 30,000 BTU, 45,000 BTU, etc.).

Q5: Does this work for electric heaters?
A: Yes, but electric heaters are typically rated in watts (1 watt ≈ 3.41 BTU/h).