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📤 Exports

Heat Load Reports

This report is a comprehensive tool to evaluate, optimize, and document a building’s thermal performance, providing insights from design into the operation.

Export Process

Go to the Export tab on the main navigation bar.

Scroll down to find the Heat Load Report section and click the Export button.

Choose your preferred export format:

  • PDF

  • Word Document

  • Both (PDF and Word Document)

You can also which sections you want to download.

Report Sections

Summary of Results

Provides an overview of the building's thermal performance, including total heat loss, worst-performing room, and heat pump model, offering a snapshot for quick evaluation.

  • External Temperature: From Heat Load Settings.

  • Internal Temperature: Set in Room Properties.

  • Total Building Heat Loss: Aggregated from the heat loss calculations of all rooms.

  • Heat Pump Model: Entered in Heat Pump Properties.

  • Worst-Performing Room: Calculated based on the highest heat loss per square meter (heat loss ÷ room area).

Room Dimensions

Summarizes the physical dimensions of each room, which are essential for calculating heat loss and ventilation requirements.

  • Room Name: From Room Properties.

  • Area: Automatically calculated from the drawn layout.

  • Height: Default from Heat Load Settings, can be overridden in Properties.

Room Features

Details room-specific properties, such as air changes, thermal bridging, and spare capacity, which influence heat loss calculations.

  • Air Change Rates: From Ventilation Methods in Heat Load Settings, adjustable in Room Properties.

  • Thermal Bridging: From Heat Load Settings, adjustable in Room Properties.

  • Spare Capacity: From Heat Load Settings, adjustable in Room Properties.

  • Fireplace Air Changes: Included in Room Properties if applicable.

  • Surrounding Rooms: Checked against adjacent rooms to verify alignment.

Room Materials

Lists the materials used in each room’s envelope (walls, windows, doors, and roofs) along with their U-values, helping to identify areas of high heat transfer.

  • Material Areas: From the drawn layout.

  • U-Values: Set in Heat Load Settings, adjustable in Room Properties.

Heat Loss Calculations

Breaks down heat loss into fabric and ventilation components for each room, providing a clear understanding of contributors to total heat loss.

  • Internal Temperature: Set in Room Properties.

  • Air Changes: From Heat Load Settings, adjustable in Room Properties.

  • Thermal Bridging: From Heat Load Settings.

  • Area and Volume: Automatically calculated from the drawn layout and Room Properties.

  • Fabric Heat Loss:

    • Formula: Heat Loss = Area × U-Value × ΔT.

  • Ventilation Heat Loss:

    • Formula: Heat Loss = Volume × Air Change Rate × ΔT.

  • Total Heat Loss: Sum of all heat loss components for each room.

  • Annual Energy:

    • Formula: Annua Energy = Total Heat Loss × Heating Degree Days.

Annual Energy Use

Estimates the annual energy required to maintain the building’s temperature, factoring in heating degree days (HDD).

  • Heating Degree Days (HDD): From Heat Load Settings, based on the building's location and local weather station data.

  • Building Peak Demand:

    • This is the Total Building Heat Loss.

  • Building Annual Demand:

    • Formula: Total Building Heat Loss × HDD.

  • SCOP (Seasonal Coefficient of Performance):

    • Entered in Heat Pump Properties. Determines energy efficiency.

  • Electricity Consumed by Heat Pump:

    • Formula: Building Annual Demand ÷ SCOP.

  • Renewable Energy Contribution:

    • Total heat load minus electricity consumption.

Domestic Hot Water (DHW) Demand

Calculates the energy required for daily and annual hot water usage, including Legionella safety measures.

  • Daily DHW Load: User-entered value in Domestic Hot Water Cylinder Properties.

  • Annual DHW Load: Daily load × 365 days.

  • Legionella Purge:

    • Temperature and Frequency: From Hot Water Cylinder Properties. Affects energy calculations for water heating.

  • Energy Use: Calculated based on the SCOP/SPF of equipment, used in conjunction with the various system temperatures

Heat Emitter Summary

Summarizes the heat emitters (radiators, underfloor heating, fan coil units) used to supply heat to each room.

  • Emitters:

    • Radiators, underfloor heating, fan coil units, and air handling units.

    • Displays each emitter’s contribution to room heat demand.

  • Room Heat Status:

    • Green: Heat demand fully met.

    • Orange/Red: Insufficient heat supply.

  • Source: Data pulled from emitter properties.

Heat Pump Design Calculations

Evaluates the heat pump’s capacity to meet the building’s heat demand and estimates running costs based on electricity prices.

  • Building Heat Loss: From heat loss calculations.

  • Heating Degree Days: From Heat Load Settings.

  • Electricity Price: Entered in Heat Load Settings under Costs.

  • Heat Pump Properties: Includes SCOP and other specifications.

  • DHW Cylinder Properties: Includes SPF and other specifications.

Heat Pump Noise Assessment

Determines whether the heat pump’s noise level meets regulatory requirements.

Inputs are all entered in Heat Pump Properties under the Noise tab.

Heat Gain Calculations

Breaks down heat gain into solar, internal, and ventilation components for each room, providing a detailed understanding of contributors to total heat gain and helping to assess cooling loads.

  • Internal Temperature: Set in Room Properties.

  • External Summer Temperature: From Heat Load Settings, adjustable in Room Properties.

  • Solar Gain: Calculated based on window orientation, shading, and Solar gain Heat Load settings.

  • Internal Gains: From internal sources such as occupants, lighting, and appliances, entered in Room Properties.

  • Ventilation Gains: Calculated from air change rates and external conditions.

  • Area and Volume: Automatically calculated from the drawn layout and Room Properties.

Heat Pump System Performance Estimate

Compares the performance of different heating systems, providing an estimate of energy use and efficiency.

  • Heat Load Settings: Cost and performance criteria, and general building information.

  • Heat Pump Properties: SCOP, flow temperature, total demand.

  • Hot Water Cylinder Properties: Volume, temperature, and Legionella settings.

How to Use the Report

Download and Share

Share your heat load design to receive a review and approvals.

Check for Anomalies

Look for unexpected values in room materials, dimensions, or heat loss breakdowns.

Troubleshoot Issues

If values seem off, revisit Room Properties, Material Settings, or Emitter Properties.

Customize Report

Use the Word document export option to tailor the report for presentations or clients.