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 for residential applications.

2. How Does the Calculator Work?

The calculator uses the simple HVAC load equation:

Where:

• \( BTU/h \) — British Thermal Units per hour (cooling capacity)
• \( Area \) — Area in square feet
• \( 25 \) — Standard multiplier for residential spaces (BTU/sq ft)

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

3. Importance of HVAC Load Calculation

Details: Proper load calculation ensures your HVAC system is correctly sized - neither too small (inadequate cooling) nor too large (short cycling, reduced efficiency).

4. Using the Calculator

Tips: Enter the area in square feet. For more precise calculations, consider factors like insulation, windows, climate, and occupancy.

5. Frequently Asked Questions (FAQ)

Q1: Is 25 BTU/sq ft always accurate?
A: This is a rule of thumb. Actual needs vary based on insulation, climate, windows, and other factors.

Q2: What if my space has high ceilings?
A: You may need to account for volume rather than just area. Consider using a more detailed Manual J calculation.

Q3: How does climate affect the calculation?
A: Hotter climates may require more cooling capacity, while milder climates may need less.

Q4: What about heating load?
A: Heating load calculations are different and typically require knowledge of local temperatures and insulation values.

Q5: When should I use a professional calculation?
A: For new construction or major renovations, a Manual J calculation by an HVAC professional is recommended.