Gas Garage Heater Size Calculator

Heater Size Formula:

\[ Q = A \times \text{BTU/ft}^2 \times F_g \]

Required Heater Size (BTU/h):

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1. What is a Gas Garage Heater Size Calculator?

Definition: This calculator estimates the required BTU output for a gas garage heater based on garage area, heat requirements, and insulation factors.

Purpose: It helps homeowners and contractors properly size a gas heater for garage spaces to ensure efficient heating.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Q = A \times \text{BTU/ft}^2 \times F_g \]

Where:

\( Q \) — Required heater size (BTU/hour)
\( A \) — Garage area (square feet)
\( \text{BTU/ft}^2 \) — Heat requirement per square foot
\( F_g \) — Garage factor (insulation adjustment)

Explanation: The garage area is multiplied by the base heating requirement, then adjusted for insulation quality and climate factors.

3. Importance of Proper Heater Sizing

Details: Correct sizing ensures efficient operation, prevents underheating, avoids excessive fuel costs, and extends equipment life.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's the typical BTU/ft² requirement?
A: 30 BTU/ft² is standard for garages in moderate climates. Use 45-50 for colder regions.

Q2: How do I determine the garage factor?
A: Use 1.0 for well-insulated, 1.2 for average, and 1.5 for poorly insulated garages.

Q3: What if my garage has high ceilings?
A: Multiply the area by (ceiling height / 8) before using in the calculation.

Q4: Should I round up the result?
A: Yes, choose the next available heater size above your calculated value.

Q5: Does this work for electric heaters?
A: No, electric heaters use different calculations (watts instead of BTUs).