1. What is HVAC Load Calculation?

HVAC load calculation determines the heating and cooling capacity needed for a space. The basic rule of thumb is 25 BTU per square foot of living space.

2. How Does the Calculator Work?

The calculator uses the simple HVAC load equation:

Where:

• \( BTU/h \) — British Thermal Units per hour (cooling capacity)
• \( Area \) — Living space area in square feet
• \( 25 \) — BTU per square foot multiplier

Explanation: This provides a basic estimate of cooling capacity needed for a space.

3. Importance of HVAC Load Calculation

Details: Proper HVAC sizing is crucial for energy efficiency, comfort, and system longevity. Oversized units short-cycle while undersized units can't maintain temperature.

4. Using the Calculator

Tips: Enter the total living area in square feet. For more accurate results, consider professional Manual J calculations that account for insulation, windows, and climate.

5. Frequently Asked Questions (FAQ)

Q1: Is 25 BTU/sq ft accurate for all homes?
A: This is a general estimate. Actual needs vary based on insulation, climate, windows, and other factors.

Q2: What if my home has high ceilings?
A: You may need to calculate by volume rather than area (cubic feet instead of square feet).

Q3: Does this account for multiple rooms?
A: This provides total load. For zoning, each area should be calculated separately.

Q4: How does climate affect the calculation?
A: Hotter climates may require more cooling capacity, while colder climates need more heating capacity.

Q5: Should I use this for commercial spaces?
A: Commercial spaces have different requirements and should use specialized calculations.