Building Heat Loss Calculator

Formula

The formula to calculate the Building Heat Loss (HL) is:

\[ HL = A \cdot \Delta T \cdot U \]

Where:

\( HL \) is the Heat Loss (BTU/hr)
\( A \) is the Area (square feet)
\( \Delta T \) is the Temperature Difference (°F)
\( U \) is the U-Value (BTU/hr·ft²·°F)

What is Building Heat Loss?

Building heat loss is the amount of heat that escapes from the inside of a building to the outside through its envelope, which includes walls, windows, doors, roof, and floor. It is a critical factor in determining the heating requirements for a building and can influence the size and capacity of heating systems. Understanding heat loss is also essential for energy efficiency and can help in designing buildings that require less energy to maintain comfortable indoor temperatures.

Example Calculation

Let's assume the following values:

Area (A) = 500 square feet
Temperature Difference (ΔT) = 30 °F
U-Value (U) = 0.35 BTU/hr·ft²·°F

Using the formula to calculate the Heat Loss:

\[ HL = 500 \cdot 30 \cdot 0.35 = 5250 \text{ BTU/hr} \]

The Heat Loss is 5250 BTU/hr.