1. What is a Ductless Heat Load Calculator?

Definition: This calculator estimates the heat load required for a space based on its area and a load factor.

Purpose: It helps HVAC professionals and homeowners determine the appropriate capacity for ductless mini-split systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \text{Load} \) — Heat load (BTU/h)
• \( \text{Area} \) — Area of the space (square feet)
• \( \text{Load Factor} \) — BTU per square foot (typically 20-30 BTU/h sq ft)

Explanation: The area is multiplied by a standard load factor to estimate the cooling/heating capacity needed.

3. Importance of Heat Load Calculation

Details: Proper heat load estimation ensures efficient system operation, proper sizing, and energy savings.

4. Using the Calculator

Tips: Enter the area in square feet and load factor (default 25 BTU/h sq ft). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical load factor?
A: For most residential spaces, 20-30 BTU/h per sq ft is typical. Higher factors may be needed for sunny rooms or commercial spaces.

Q2: How does climate affect the load factor?
A: Hotter climates may require higher factors (25-30 BTU/h sq ft), while milder climates may use lower factors (20-25 BTU/h sq ft).

Q3: Should I adjust for room height?
A: Yes, for ceilings over 8 feet, increase the load factor by about 10% per additional foot.

Q4: Does this include heat from appliances?
A: No, for kitchens or rooms with many appliances, add 4000-6000 BTU/h to the calculated load.

Q5: How accurate is this simple calculation?
A: This provides a rough estimate. For precise sizing, consult a Manual J calculation from an HVAC professional.