IESVE 2021

IESVE 2021 extends energy code compliance offerings and strengthens tools to aid the drive for decarbonization

VE 2021 Feature Pack 1 Updates

NECB 2017 Navigator for Canadian Code Compliance

  • New Navigator for New Buildings and Additions
  • Workflow and automation (data, grouping, rulesets, reference creation, systems, reportage) make NECB readily accessible and quick to use (including reaching an optimum solution)
  • Partially funded by NRCan
  • Full details of webinars and training available here

Enhanced HVAC systems data can now be imported in gbXML from Autodesk

  • Imports HVAC system(s) from Revit including the HVAC Zoning(s) 
    • Revit System choices mapping to VE Prototype HVAC Systems
  • Sets primary system and room based systems
  • Sets both air and waterside systems
  • Sets the temperature setpoints and setbacks at room level
  • Sets the OA ventilation requirements both at system and room level
  • Sets the Master Room 
  • Sets both conditioned and unconditioned rooms
  • Script available from IES content store 

Additional Updates

Speed up to Climate Based Daylight Modelling (CBDM) 

  • UDI, ASE, sDA now available via faster rtrace-dc Radiance module
    • The rtrace-dc route means a detailed glazed space will simulate on the fast settings option.
      • UDI 10-20x faster
      • ASE 60-80x faster
      • sDA 10-15x faster
    • Fully compliant with LM 83:2012

IESVE 2021 Updates

Florida Building Code 7th edition 2020

As part of IES’ ongoing commitment to providing energy code-compliance solutions in North America, IESVE Software is now certified by the Florida Building Commission for the 2020 Florida Energy Code.

  • Certified by the Florida Building Commission. 
  • Compliance achieved through the ASHRAE 90.1-2016 Navigator.
  • Florida-specific budget building is automatically created, per FBC requirements. 
  • Florida specific compliance reports are generated.
  • IES training courses certified for continued education (CEU/PDH’s) by Florida Board of Professional Engineers.

ASHRAE 90.1-2016

A number of new productivity features have been added to the latest 2016 version of the ASHRAE 90.1 Navigators:

  • Proposed building can be automatically pre-populated in two ways:
    • Prescriptive – using 90.1 standard data or
    • Performance – using Appendix G baseline
  • Constructions can now be applied automatically based simply on the choice of building type and climate zone
  • New calculation methodologies for the following energy end uses
    • Elevators / escalators
    • Refrigeration
  • New end uses enhanced to include
    • Interior lighting (unregulated) / Transformers / Motors 
  • Unregulated energy use types expanded to include
    • Lighting / Process / Receptacle / Cooking
  • New approaches to controls
    • Lighting – new baseline control (based on fraction 90% only)
    • Receptacles – user choice (manual / automated)





ASHRAE 55 2013 & 2017

New methods and a new flexible approach to setting up and analysing thermal comfort

  • Room level comfort settings accounting for occupant’s response to their perceived comfort
  • 18 new room variables in VistaPro provides more insight into occupant discomfort and make decisions to enhance comfort with low energy use
  • Three methods can be used for adaptive comfort:    
    • Software automates how occupants would adapt to find their optimum comfort level
    • Users can set adaption limits based on modulating occupancy profiles
    • Users can set adaption values based on absolute or formulae based occupancy profiles
  • Elevated air speed –fan cooling effect (& associated energy usage) can be assessed room by room
  • The impact of direct solar radiation  on the occupant is now accounted for in the comfort assessment:
    • Accounts for the posture of the occupants within the room
    • Accounts for mitigation effects such as the control of blinds/louvres 

Air to Air Heat Pumps

  • Enhanced heat pump method that includes the following updates:
    • Capacity and compressor power vary by:
      • Wet-bulb and Dry-bulb temperatures
      • Part-Load Ratio
    • EIR for fan on outdoor coil (heat rejection/acquisition)
    • Back-up heat source with multiple control schemes
    • Crankcase heater for compressors
    • Defrost: resistive or reverse-cycle; timed or demand control
  • Interrelated efficiency parameters are now calculated and displayed by the software 
  • COP, EERnf (EER with no fan), & IEER per entered EER value
  • Performance curves as required by the California Title 24 ACM Manual DX Cooling and HP Heating sections
    • Available for use outside of California Title 24 

Free Convection: Cooling Towers/Fluid Coolers

  • Free convection can now be assessed for both Cooling Towers and Fluid Coolers, allowing for associated reductions in electrical energy.
  • Controlling parameter is the ‘Free convection airflow fraction’, based upon the assumption that a moderate initial fraction (e.g., 10%) of cooling-tower or fluid-cooler airflow will be driven by thermal stack effect. 
  • Fluid Cooler – new control option:
    • Applicable only to Wet/Dry Fluid Coolers
  • Two options available:
    • Maximise dry operation (dry whenever it can meet the load)
    • Maximise wet operation (always wet at or above set temperature)

Fan Control Updates

  • Added capability for zone-level recirculation fans to operate only when associated compressor operates (as in heat pumps, zone-level AC, etc.) via new “Cycle on with terminal unit compressor” control option in the system parameters UI. 
  • For AAHP, WAHP, and DX Cooling, a new “Single compressor with fixed speed/output” checkbox determines if the compressor is modeled (via curve data) as cycling on/off below 100% load, or as cycling on/off only below min PLR setting (via simulation run-time fraction). This also influences the fan cycling, when that is linked to the compressor operation.

Daylighting Enhancements

  • Multi-Room Dynamic Daylighting Visualization 
    • Multiple rooms showing Dynamic Daylighting results can now be visualized at the same time
    • RadianceIES collates all rooms with same outputs for selection and visualization, saving you time
  • Window Labelling
    • Improved labelling of windows and window groups for VSC and sDA calculations now available

Release Notes

For further supporting information please take a look at the IESVE 2021 release notes. 

Got a question?

Our team is happy to answer any questions you have about the new features in IESVE 2021.