MCS Heat Loss Calculator UK

Heat Loss Formula:

\[ Q = \text{Fabric Loss} + \text{Ventilation Loss} + \text{Infiltration} \]

Total Heat Loss (Q):

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1. What is the MCS Heat Loss Calculator UK?

Definition: This calculator determines the total heat loss (Q) of a building according to MCS (Microgeneration Certification Scheme) standards in the UK.

Purpose: It helps energy assessors and heating engineers calculate the heat loss for domestic properties to properly size heating systems.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Q = \text{Fabric Loss} + \text{Ventilation Loss} + \text{Infiltration} \]

Where:

\( Q \) — Total heat loss (Watts)
Fabric Loss — Heat loss through building fabric (W)
Ventilation Loss — Heat loss through designed ventilation (W)
Infiltration — Heat loss through air leakage (W)

Explanation: The three components of heat loss are summed to give the total heat loss figure required for MCS compliance.

3. Importance of Heat Loss Calculation

Details: Accurate heat loss calculations ensure properly sized heating systems, energy efficiency, and compliance with UK building regulations.

4. Using the Calculator

Tips: Enter the fabric loss, ventilation loss, and infiltration values in Watts. All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: What is fabric loss?
A: Heat lost through walls, roof, floor, windows and doors due to temperature differences.

Q2: How is ventilation loss calculated?
A: Based on designed ventilation rates from building regulations Part F.

Q3: What affects infiltration rates?
A: Air permeability of the building fabric, measured in air changes per hour (ACH).

Q4: Why is MCS heat loss important?
A: It's required for heat pump installations and other renewable heating systems under the MCS scheme.

Q5: Where can I get component values?
A: From SAP calculations, building plans, or on-site measurements by qualified assessors.