Loads Analysis and HVAC Design Tools

Accuracy, Depth, and Ease of Use

Why choose the VE?

Loads analysis tools within the Virtual Environment (VE) provide a streamlined workflow for calculating peak heating & cooling loads for rooms, zones, and HVAC systems. Loads are calculated using the ASHRAE Heat Balance Method, offering a more accurate and more complete analysis than Radiant Time Series. Thermal adjacencies are computed using the 3D data model at the heart of the VE, with accounting for thermal mass as well as solar gain calculated for unique internal and external model surfaces. The system loads analysis within the VE is integrated with HVAC system operation when sizing HVAC equipment. Users can coordinate and control diversity factors and internal gain schedules for room/zone loads independent of system loads, eliminating the need to create two models for separate peak load calculations! In addition to formatted loads reports, the VE includes a powerful analysis tool for in depth investigation of model results. All of this feeds directly into an industry leading energy modeling tool for projects whose scopes extend beyond load calculations.

Why choose the VE?

Loads analysis tools within the Virtual Environment (VE) provide a streamlined workflow for calculating peak heating & cooling loads for rooms, zones, and HVAC systems. Loads are calculated using the ASHRAE Heat Balance Method, offering a more accurate and more complete analysis than Radiant Time Series. Thermal adjacencies are computed using the 3D data model at the heart of the VE, with accounting for thermal mass as well as solar gain calculated for unique internal and external model surfaces. The system loads analysis within the VE is integrated with HVAC system operation when sizing HVAC equipment. Users can coordinate and control diversity factors and internal gain schedules for room/zone loads independent of system loads, eliminating the need to create two models for separate peak load calculations! In addition to formatted loads reports, the VE includes a powerful analysis tool for in depth investigation of model results. All of this feeds directly into an industry leading energy modeling tool for projects whose scopes extend beyond load calculations.

Why choose the VE?

Loads analysis tools within the Virtual Environment (VE) provide a streamlined workflow for calculating peak heating & cooling loads for rooms, zones, and HVAC systems. Loads are calculated using the ASHRAE Heat Balance Method, offering a more accurate and more complete analysis than Radiant Time Series. Thermal adjacencies are computed using the 3D data model at the heart of the VE, with accounting for thermal mass as well as solar gain calculated for unique internal and external model surfaces. The system loads analysis within the VE is integrated with HVAC system operation when sizing HVAC equipment. Users can coordinate and control diversity factors and internal gain schedules for room/zone loads independent of system loads, eliminating the need to create two models for separate peak load calculations! In addition to formatted loads reports, the VE includes a powerful analysis tool for in depth investigation of model results. All of this feeds directly into an industry leading energy modeling tool for projects whose scopes extend beyond load calculations.

Powerful Features

  • 3D data model for visualization and accurate modeling of thermal adjacencies
  • Auto-associated return & supply air plenums with settings for fraction of convective lighting gains to return air plenum
  • Detailed solar calculation tracks solar radiation through the façade onto interior surfaces
  • Drag & drop HVAC zoning and zone grouping
  • Unique HVAC cooling & heating design day profiles for load calculations
  • Independent control over application of diversity factors for Room/Zone loads, System Loads, and annual dynamic simulation
  • Independent control over gain saturation for Room/Zone loads, System Loads, and annual dynamic simulation
  • Central simulation processor supports assessment of every aspect of thermal performance
  • Graphical visualization of results for rooms, zones, systems, and equipment
  • Generate room, zone, and system loads reports with option to include/exclude oversizing factors and to set relevant coils for heating and cooling peaks

Free Masterclass: HVAC Design Sizing Tools

This course takes you through the process for calculating HVAC loads.

Free Training

our Solutions to Industry Feedback

DESIGN COMMUNITY FEEDBACK: HVAC loads and sizing tools lack visual feedback to enhance design team communication.

SOLUTION: IESVE incorporates HVAC zoning with 3D geometry and high-quality visualizations of inputs and outputs to make it easier for all project stakeholders to communicate complex information.

DESIGN COMMUNITY FEEDBACK: HVAC loads and sizing is very difficult for high performance systems like DOAS, UFAD, displacement, and Radiant Systems.


SOLUTION: Intelligent geometry objects link with HVAC objects to make it faster and easier to create, QA, and calculate loads and energy for all system types – including DOAS, chilled beam, IDDE, WSHP, DX, ASHP, VAV, UFAD, displacement, and radiant heating and cooling.  Our detailed HVAC system library is ever-expanding and features these and other system types.

DESIGN COMMUNITY FEEDBACK: HVAC loads and sizing reports are essential to high-level checks and QA.

SOLUTION: VE 2017 has expanded HVAC sizing and loads reports to make quick checks easier and faster.

DESIGN COMMUNITY FEEDBACK: Loads reports can be difficult to interpret beyond high-level checks.


SOLUTION: In addition to detailed loads reports, IESVE also supports detailed loads visualization to make it easier and faster to understand the results at a detailed level

 

DESIGN COMMUNITY FEEDBACK: HVAC loads and sizing is time-consuming and requires lots of iteration to get it right.

SOLUTION: Pre-calculation checks reduce errors on the inputs reducing iterations.  And the simulation manager lets loads, energy simulation, and lighting simulations run in the background increasing productivity significantly by letting you keep working.

 

DESIGN COMMUNITY FEEDBACK: It’s challenging to coordinate appropriate inputs for room/zone versus system sizing.

SOLUTION: Providing tools that remember your settings so you can use one model with settings appropriate to each stage of design.

Related HVAC Videos

  • HVAC Methodology

  • Space Types

  • HVAC Zones

  • Zone Airflow Distribution Table

What our customers say

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