Heating BTU to Square Footage Calculator

Heating Load Formula:

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

Heating Load (BTU/h):

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1. What is a Heating BTU to Square Footage Calculator?

Definition: This calculator estimates the heating load in BTUs per hour based on the area in square feet and the BTU requirements per square foot.

Purpose: It helps HVAC professionals and homeowners determine the heating capacity needed for a space.

2. How Does the Calculator Work?

The calculator uses the formula:

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

Where:

\( Q \) — Heating load (BTU/h)
\( A \) — Area (square feet)
\( \text{BTU/ft}^2 \) — BTU requirement per square foot (BTU/h·ft²)

Explanation: The area is multiplied by the BTU requirement per square foot to determine the total heating capacity needed.

3. Importance of Heating Load Calculation

Details: Proper heating load estimation ensures comfortable temperatures, energy efficiency, and correct sizing of heating equipment.

4. Using the Calculator

Tips: Enter the area in square feet and BTU per square foot (default 20 BTU/h·ft² for moderate climates). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical BTU per square foot value?
A: For moderate climates, 20-30 BTU/h·ft² is common. Colder climates may need 30-45 BTU/h·ft².

Q2: How do I measure the area?
A: Measure length × width of each room and sum them for total square footage.

Q3: What factors affect BTU requirements?
A: Climate, insulation, ceiling height, window quality, and building materials all impact heating needs.

Q4: Should I round up the calculated BTU?
A: Yes, it's recommended to round up to the nearest standard furnace or heater size.

Q5: Does this include heat loss calculations?
A: This is a basic estimate. For precise calculations, consider professional Manual J load calculations.