BTU Calculator for Heating a Room

Heating Load Formula:

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

Heating Load (BTU/h):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is a BTU Calculator for Heating a Room?

Definition: This calculator estimates the heating load required for a room based on its area and the BTU factor.

Purpose: It helps homeowners and HVAC professionals determine the appropriate 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)
\( A \) — Room area (square feet)
\( \text{BTU/ft}^2 \) — BTU factor per square foot (BTU/h·ft²)

Explanation: The room area is multiplied by the BTU factor to determine the total heating requirement.

3. Importance of Heating Load Calculation

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

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is a typical BTU factor value?
A: For moderate climates, 20 BTU/h·ft² is common. Use 30-35 for colder climates or 10-15 for warmer areas.

Q2: Should I adjust for room height?
A: Standard calculations assume 8-foot ceilings. For higher ceilings, multiply the result by (ceiling height ÷ 8).

Q3: What about windows and insulation?
A: The BTU factor accounts for average conditions. For many windows or poor insulation, increase the factor by 10-20%.

Q4: How do I convert BTU to watts?
A: 1 BTU/h ≈ 0.293 watts. Multiply BTU by 0.293 to get watts.

Q5: Does this include heat loss?
A: Yes, the BTU factor incorporates typical heat loss through walls, windows, and doors.