• • Added option to open windows to prevent overheating (to keep design temperature) with air flow model
  • The simulation in batch mode will not stop and wait for user interaction if an error occurs during simulation

• • Added new renewable energy measures as g net source energy offsets
  • Dynamic monthly shading calculation regarding the three-dimensional building model:
    • Shown geometry in the 3D-visualization will shade transparent components
    • Window reveal depth and distance from glass to opening is regarded
    • Overhangs are regarded, including a horizontal extension wider than the window
    • Removed landscape obstruction parameter for single transparent components (work in progress)
  • More detailed domestic hot water distribution loss calculation for residential buildings. Includes a tool to aid in the design of a DHW distribution network that will pass the EPA Watersense hot water delivery test.
  • ANSI/RESNET calculation for laundry washer, laundry dryer and dishwasher
  • Introducing drain water heat recovery as optional mechanical system device, in combination with the new DHW calculation
  • Added ‘Undefined/unfinished’ type for occupancy setting in non-residential buildings including defaults for internal heat gains, ventilation, etc according to PHIUS mixed-use protocol
  • Added new isolated tab for process loads from other building electrical loads which helps to verify compliance with the PHIUS+ source energy target, and includes source energy allowance when applicable
  • Updated air-tightness limit for buildings with 5 stories and above and an non-combustible construction
  • Monthly site energy report to support quick comparison between calculation and monthly utility bills
  • Added device options for on-site and off-site renewable energy production
  • Updated Tool Tips (special thanks to PHIUS)

• Periodic Day Profiles (Internal Loads, Ventilation, HVAC, …): A warning message appears, if a profile’s time period is outside the simulation period.
• 3D Objects: Faster calculation time for air layers by setting the type of the material to “air” (by double-clicking on the material). The grid, respectively the discretization is then neglected for this layer.
• The limit for the creation of new zones was removed.
• For components with “Space with the same interior conditions” on the outer side all boundary conditions (temperature, relative humidity and radiation) are applied now

• [Fixed] If calculation of rain load was activated once it was still considered in the simulation, even if it was deactivated later in the general building numeric settings.
• [Fixed] Only in Batch-Mode: Values in the file “…MainResults.txt” could be wrong. Additional results were added.
• [Fixed] Periodic Day Profiles weren’t used correctly if the simulation didn’t start at midnight.
• [Fixed] Sunscreen Devices: Thermal resistances of solar protection and cavity weren’t applied in the simulations.
• [Fixed] Movies during simulation: An error message appeared in some zone-movies, if the y-axis‘ minimum was set to a higher value than the y-axis‘ maximum.
• [Fixed] Moisture exchange by controlled mechanical ventilation was disregarded.
• [Fixed] The software could crash, if new curves were added to the result graphs.
• [Fixed] Wrong results for ventilation moisture fluxes were displayed in the graphs and results export. During the simulations, the moisture fluxes were calculated correctly.
• [Fixed] Initial value of heat and moisture fluxes was sometimes not saved in the result data, this leads to an error showing the result graphs
• [Fixed] Very high air flow rates with the air flow model lead to unrealistic temperatures in the zones.
• [Fixed] The calculation could freeze during shading calculation due to not exact coordinates of the vertices of the building components exported with sketch up models.

• Commentary function to document all inputs
• GUI adjustments (up-to-date fonts, new options dialog structure, more mouse-over-help options, …)
• Extended F1 help with substantially updated handbooks and tutorials
• Import tool for WUFI Pro Material data (in Tools folder)
• Modifications for SketchUp and gbXML import
• Material layers in the assembly modification dialog can now be moved with newly added arrows
• Extended report export (in .doc, .docx and pdf)
• Updated database

• Extended results export
• Comparison of results of different variants and creation of user defined comparison graphs added
• Thermal bridge effect on heat balance can be taken into account
  • New options for film during simulation
  • More default results graphs
  • Window shading factors separated for external and controlled shading
• The water content unit in the simulation movie can now be changed to mass-percent (M.-%)
• Improvements for dynamic HVAC simulation (on/off of devices per schedule, direct electric heating of hot water tank, return temperature dependent on exterior temperature)
• Simulation boundary conditions from Passive scope can be transferred to dynamic hygrothermal simulation

• Differences in the solar radiation on grouped components in case of user defined solar gain distribution
• Bug with wrong PPD in case of PMV = 0
• Bug in 3D Objects in explicit calculation mode (if air-flow mode or dynamic HVAC systems were used) – leading to inaccurate consideration of thermal storage in 3D Object

• New approach to compute airtightness: Also components adjacent to non-simulated zones or to zones with the same inner climate are now part of the enclosure area and are taken into account for the calculation of the airtightness. So in case of an area related airtightness to those zones this will result in a difference in infiltration air change.

• The COP of the simple heat pump model will not be reduced by 0.8 anymore in case a washing machine or a dishwasher is connected to its hot water connection.

• New side calculators
  • (Side calculator) Extended Heat pump Type for monthly COP calculation depending on rated COP conditions
  • (Side calculator) Extended Heat pump Type for Heat pump water heaters (HPWH)
  • (Side calculator) for AHRI rated HRV/ERV for mechanical ventilation systems
• Standard procedure (Default Standard/ PHIUS+ 2015) can be set in the options dialog
• Revised standard data set for PHIUS+ internal loads
• Separation of sensible and latent cooling load in report
• ASHARE manual J calculation
• Additional mouse-over hints with modelling recommendations from PHIUS. Those can be switched on/off in the options dialog.

• Extended transparent component list in Passive house report.
• Error message due to copy and insert a mechanical ventilation devices
• Average humidity recovery efficiency for more than one mechanical ventilation system
• In case of zero heating degree days an unrealistic high energy demand was calculated for the hot water system
• Database import of climate data

• The shares for a mechanical ventilation device for multiple-zones can now be
• Results graphs from DIN 4108-2 report are now also available in the Results -> Graphs section

Preprocess results for shading were taken wrong for a duplicated case, if the pre calculation was not renewed for the new case

Shading calculation was inaccurate due to calculation time improvements

Fixed heat- or energy recovery calculation (hrv/erv efficiency) for one mechanical ventilation device covering more than one simulated zone.

Fixed error occurring importing a deleted material again.

Fixed automatic setting for the heat transfer resistance of component boundary conditions for a 3D-object

Fixed TABS data parameter input for dynamic hvac simulation.

Report for transparent components extended (for projects with many windows).

Increased range for some parameters (max. recirculation air cooling power, foundation interface floor area, lengh of individual pipes for DHW)

Fixed humidity recovery (efficiency) from mechanical ventilation devices depending on summer ventilation bypass setting

Setting of the volumetric requirement (if essential)  for the average design air flow rate in PHIUS+ 2015 certification mode

Added warnings for may missing input for system distribution (dhw distribution,  ventilation ducts) and PHUIS+2015 recommend settings

interzonal ventilation not working under certain conditions

initialization period is considered in heating / cooling demand

shading calculation partly not considered

dynamic sunscreen protection by radiation limit not working correctly

optional climates are not taken over when new/copy case

3D object: missing boundary conditions of components past dublicating case

error in zone visualization during simulation with small timesteps

missing parameter in weather database

some IP unit system issues fixed

minor bug fixes: translation strings, tooltips, result display scaling, XML entries, batch mode solar protection results…

Added gbXML import (standardized file format, export available in different CAD-software products)

Batch mode simulation (running WUFI Plus from the command line)

Improved WUFI Plus/Passive – XML-Project file support

Assign Data Button: assign equal input data of one zone/component to other selectable zones/components

Multi-core processor usage for the simulation

Revised reports for project documentation and results, e.g. inner component sources, simulation accuracy,…

Report export to MS Word files

Implementation of the air flow model including automatic parametrization of the flow paths regarding global input of common known building information; added blower-door test simulation to check the air flow parametrization; improved air flow project documentation and summarized results

DIN 4108-2 simulation (including simulation setup and a detailed report)

Implicit / explicit simulation including automatic choosing of the optimal simulation method and variable time step size

Improved film visualization of simulated zone results during the simulation

Added numerics tab for the whole building, for global calculation method settings, e.g. shading calculation, explicit radiation balance, rain load, air flow

Fixed some issues regarding the 3D-oject deleting materials, loading from old project files

Fixed issue loading external data for a predefined internal climate

Fixed an issue past changing the building orientation regarding missing assemblies for the simulation

Fixed crash at certain material database settings in the user database

Revised manual (PDF) and example project files

PHIUS 2015 Climate-Specific Passive Building Standard adaption:

Climate specific target calculation, input or from database; primary energy demand for residential buildings increased to 6000 kWh/Person yr.; air change rate per gross envelope area

Revised cooling demand, peak cooling load, and cooling unit calculation including sensible cooling demand calculation and peak cooling load calculation regarding two different weather conditions, detailed COP input for different cooling units (e.g. side calculator for the dehumidification device COP in [liter per kWh]

Added simple photovoltaic / renewable energy device regarded for the primary energy demand

Added input for the envelope airtightness coefficient (CFM50) instead of ACH50

Added PHIUS 2015 internal load appliances for misc electricity load and lighting (80% RESNET)

Primary energy factor for electric mix 3.16

Net volume input for the ventilation calculation (instead of the floor area and clearance height)

Revised climate data input; monthly climate data database connection; localization visualization

Improved solar collector calculation for heating support; input of external calculated heat gains

Revised summer ventilation input for regular ventilation (if not defined the winter ventilation air change rate is used); additional ventilated cooling input

Added simple exhaust ventilation (without HRV/ERV) input for makeup air devices

Revised internal load input for residential buildings; definition of the quantity per device/type

Several intermediate result outputs on different input forms, e.g. shading factors, design ventilation rates, average air change rate, occupancy, internal heat gains, foundation ground temperatures, envelope area

Multiple foundation interface calculation

Revised water storage calculation (fixed a bug regarding the quantity)

Side-calculator for the specific heat capacity of the building regarding heavy surfaces

Site energy calculation output

Volumetric air change requirement is checked, but not automatically set

Added different warnings

Fixed an issue regarding user defined R_si and R_se input

Revised manual (PDF) and example project files

In some situations, WUFI Plus would crash when deleting 3D objects. This has been fixed.

In some situations, the shading from window overhangs was not being calculated. This has been fixed.

Monitor positions are now displayed graphically.

A world map to illustrate the selected climate location has been added. It is also possible to display climate location from the latitude/longitude input field in user-defined climate data files.

Some details on the user interface have been improved.

Several minor bugs have been fixed.

3 neue insulating materials:

4 new membranes:

17 Green Roof materials:

11 new wooden materials and boards:

15 new mortars and plasters:

Two new generic materials for Green Roofs have been added to the material database:

Generic gravel

Generic substrate

52 new constructions have been added to the constructions database
(the previous catalog “Multi-layer systems” has been replaced by “Interior Insulation Systems” and “Plaster Systems”).

9 Knauf plaster systems (under “Plaster Systems”)

5 Green roofs (under “Roofs”)

38 dena constructions (under “dena Constructions (German Energy Agency)”)

The weather file for Grenoble contained counterradiation data which were too low. This has been corrected. The corrected file was given a new database ID to make sure that existing projects using the old file do not automatically recognize the new file which thus must be re-selected.

When the weather files for Montreal and Edmonton were created, some bits had inadvertently set to 1 in the binary floating point numbers, resulting in – usually small – modifications of the data. This has been corrected. The corrected files were given new database IDs to make sure that existing projects using one of the old files do not automatically recognize the new file which thus must be re-selected.

The “Moisture Reference Year” for Holzkirchen, which had been included with WUFI as a binary *.WBC-file is now in the open *.WAC format. Users thus can export, analyze and edit the data.

The U.S. cities for which weather data are included with WUFI are now listed with their state codes included, for better orientation and for disambiguation between cities with the same name (e.g. Wilmington, DE and Wilmington, NC).

Zones and components are now presented in a table for a quick overview.

The result report and the result graphs can now be edited manually in more detail.

ASCII and Excel data can now be exported at once for all zones and selected components.

Interzonal airflow allows to take air exchange between zones into account.

In addition to heat recovery, a mechanical ventilation system can now also take moisture recovery into account.

During the simulation not only zone conditions and component temperature and moisture distribution are visualized, but also the radiation input on various surfaces.

An online switch between SI and IP units is available.

An updated version of the manual is included with the download.

New introductory and explanation movies as well as tutorials with overview movies are available at http://www.wufi-wiki.com.

On the one hand the monthly balance method is used to achieve fast results about the energy demand of a building and to check whether the building meets the passive house criteria. On the other hand it is possible to conduct a detailed hygrothermal whole building simulation, based on the same building model (with the same or adjusted, time-dependent boundary conditions). This allows a more granular assessment of the energetic building performance, the comfort conditions in different zones of the building but also an analysis of the hygrothermal conditions on and in building components under realistic boundary conditions.

Source: Fraunhofer IBP:

Catalog: Mortar and Plaster:• Knauf Rotkalk Fein, • Knauf Rotkalk Grund

Catalog: Insulating Materials:

Catalog: Wooden Materials; Boards:• KLH Massivholz, • AGEPAN OSB/3 PUR, 12 mm, • AGEPAN OSB/4 PUR, 12 mm

Source: Generic Materials:

Catalog: Air Layers:• 13 new air layers

Source: Japan Datenbase (new!):• Dailite MS 9 mm, • Dailite MS 12 mm

Source: Materials for thermal calculations (from DIN 4108-4 or other sources):

Catalog: IBP Measurements:• NeptuTherm