Passive:Verification
Results of Passive House Verification
This page shows the different subpoints of the output of the Passive House Verification. There will be a short description of the output parameters for each subpoint as well as a screenshot.
Building Information
The first section summarizes general information about the building itself and important boundary conditions such as the interior temperature or the internal loads.
Passivehouse requirements
The primary passive house requirements depend mostly on energy demand, mainly in form of cooling and heating as well as primary energy demand. All values are given in a specific value (per square meter/feet) and in total. Heating and cooling demand also provide a peak value(month), which is estimated by the extreme weather conditions in the climate tab.
Secondary Passivehouse Requirements
The secondary requirements consist of the HRV efficiency and a percentage chance of overheating of the building. Depending on the values WUFI®Passive will give recommendation if a seperate cooling system is needed or not.
Building Elements
The building elements describes the influences of windows, HVAC systems and electric devices on the energy demand.
Windows
The graphic shows the heat losses and gains of solar radiation through windows depending on the orientation. Also average values for all windows are given together with the total glazing area.
HVAC
The energy demand of all HVAC devices is summarized here.
Electricity
The energy demand of all other electric devices is listed here.
Heat Flow
Heat gains and losses are divided on different causes.
Heat gains are seperated into solar gains, inner sources, thermal bridges and mechanical heating.
Heat losses are seperated into windows&doors, the building envelope and natural and mechanical ventilation.
Both statistics are displayed in a pie chart.
Climate
Here you find local climate conditions e.g. the height of the building or ground conditions.
Furthermore there is a graphical overview of the climate given in the localization/elimate section and possible calulations of undefined values (e.g. ground/sky temperatures).
The second graph displays the solar radiation sepatated by their orientation.
Calculation Parameters
The main boundary conditions for the heat loss calculation are listed here.
There you will also find the extreme weather conditions for the calculation of the heating/cooling load. For the heating load there are two possible climates available. The relevant climate (the climate with higher heating load demand) is displayed on bottom.
Annual Heat/Cooling Demand
Opposes annual heat gains and losses and thereby calculates the annual heat/cooling demand.
The losses/gains are summarized by categories and grphically displayed on bottom for better review.
Note: the heat gains during heating period and the heat losses during the cooling period are reduced by the Utilization Factor. The Utilization Factor is estimated by a complex calculation.
Heating/Cooling Load
Apart from the Utilization Factor, the calculation is similar to the heating/cooling demand calculation. The results are based on the extreme weather conditions shown above. For the heating load the two possible weather conditions are investigated and the worst case is taken as the relevant one.
Areas
For each component the most important values are displayed in tabular and graphical form. The results are used for the heating/cooling demand calculation.
Thermal Brigdes
Summarizes all thermal bridges given in the thermal bridge tab of the tree and its heat gains and losses.
Windows
Shows the number, orientation and specific values of all windows and their influence on the heat gains and losses. These results are used in the calculation of the heating and cooling demand.
Summary Building Envelope
Dimensions of all building elements as well as their U- or Psi-Value. Also the transmission losses of each element, which are also needed for the heat gain/loss statistic are given.
The respective final shading effect of each orientation is outlined here as well for both, the heating and cooling period.
HVAC Systems
An enumeration of all HVAC systems and their influence on the DHW consumption, heat gains/losses and primary energy demand or a equivalenct CO2 emission.
Ventilation
All relevant values related to the mechanical and natural ventilation are displayed here. If there are more than one ventilation units, the total efficency of the ventilation system and the individual ones are listed on bottom. Those numbers also depend on the attached ducts and their instulation standard.
Electricity Demand - Auxiliary Electricity
A table containing the energy demand of all HVAC and all affiliated systems.
Electricity Demand Of Electric Devices
A list of all input electric devices and their annual electric demand.
As input of residential and non-residential building differs, WUFI has different graphics for each type.
Internal Heat Gains
Internal Heat Gains can either be calculated individually by entering data for home e.g. devices, lighting... or general predefined default values:
Dwelling: 2.1 W/m²
Home for elderly/students: 4.1 W/m²
Office/administrative building: 3.5 W/m²
Schools: 2.8 W/m²
DHW and Distribution
The relevant data for DHW distribution is shown in this section.
A list of all distribution pipes and water storages can be found here as well.
