Heating Design Summary Table

Summary Display Options

Totals method

You can sum total heating loads displayed on the Summary tab in 2 different ways:

• 1-Building - loads are summed for the whole building.
• 2-System - loads are summed for each System type allowing you to calculate system (AHU)/block loads for sizing AHUs.

Summary Results

The Summary tab shows a range of Design heating loads, ventilation and fabric gains for each zone and other related data. Outputs for each zone are summed based on the Totals method Display option (see above):

• Zone multiplier is the Zone multiplier factor entered on the Activity tab. It is used to define the number of zones represented by this zone in the model. By default, it has a value of 1.
• Comfort temperature - The mean of the internal air and radiant temperatures.
• Steady-state heat loss (kW or kBtu/h) is the Zone Sensible Heating calculated by EnergyPlus, the heat delivered to maintain the internal heating design temperature for the outdoor design conditions.
• Design capacity (kW or kBtu/h) is the Steady-state heat loss (see above) multiplied by the Design margin to give the design heating capacity of the equipment.
• Design capacity (kW or kBtu/h) is the Steady-state heat loss (see above) normalised by floor area and multiplied by the Design margin to give the design heating capacity per floor area of the equipment.
• Glazing Gains (kW or kBtu/h) are the gains through windows (excluding solar gains).
• Wall Gains (kW or kBtu/h) are the gains through all external and internal wall (partition) surfaces.
• Floor Gains (kW or kBtu/h) are the gains through all floor surfaces.
• Roof and Ceiling Gains (kW or kBtu/h) are the gains through all roof + ceiling surfaces
• Ventilation Gains (kW or kBtu/h) are the mechanical + natural ventilation gains.
• Infiltration Gains (kW or kBtu/h) are the gains due to infiltration of outside air into the building through cracks and fabric porosity.

Tip: Use the Export command to export this data in spreadsheet format.