Myson Heat Loss Calculator

Heat Loss Formula:

\[ Q = U \times A \times \Delta T \]

Heat Loss (Q):

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1. What is a Myson Heat Loss Calculator?

Definition: This calculator estimates heat loss (Q) through a building element using the formula Q = U × A × ΔT.

Purpose: It helps heating engineers and building professionals determine heat loss for proper heating system sizing.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Q = U \times A \times \Delta T \]

Where:

\( Q \) — Heat loss (Watts)
\( U \) — U-value (W/m² K)
\( A \) — Area (m²)
\( \Delta T \) — Temperature difference (Kelvin)

Explanation: The U-value represents thermal transmittance, multiplied by surface area and temperature difference.

3. Importance of Heat Loss Calculation

Details: Accurate heat loss calculations ensure properly sized heating systems, energy efficiency, and occupant comfort.

4. Using the Calculator

Tips: Enter the U-value (thermal transmittance), surface area, and temperature difference between inside and outside. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical U-value for walls?
A: Modern insulated walls: 0.18-0.30 W/m²K, older walls: 1.0-1.5 W/m²K.

Q2: How do I determine ΔT?
A: Subtract outside design temperature from desired internal temperature (e.g., 21°C inside - -3°C outside = 24K ΔT).

Q3: Does this include ventilation heat loss?
A: No, this calculates fabric heat loss only. Ventilation losses require separate calculation.

Q4: Why use Kelvin for temperature difference?
A: The Kelvin scale gives the same magnitude as Celsius for differences (1K = 1°C difference).

Q5: How accurate is this calculation?
A: It provides a basic estimate. For complete heat loss analysis, consider all building elements and thermal bridges.