• RE: Pipework Velocities Input

    Hi Jamie, The CIBSE table is using typical bands therefore it would make sense to enter the highest CIBSE value for each band in the system marker. This limits the velocity for any sizes within that band. The settings shown below would meet that criteria…

  • Limitations, assumptions and approximations of Hevacomp, particularly CIBSE Gain

    I am wondering if you could help point me in the right direction. I am wanting to better understand what are the limitations of Hevacomp in terms of the underlying assumptions and approximations that the software uses. I am mostly interested in the…

  • RE: Glazing database - effect of adding blind on G value and Shading co-efficient - CIBSE Gain

    Hi Michael, It is my understanding that the Uvalue and light Transmittance figures will not be affected by the blind, while the Shading Coefficient and SHGC would definitely be impacted. However the glazing manufacturer will need to confirm this for…

  • How to display Section Numbers on your Netsys system

    Product(s): Hevacomp Mechanical Designer Version(s): V8i Environment: N/A Area: Netsys Subarea: All Overview Enabling section numbers can help to provide clarity when inspecting or troubleshooting…

  • RE: Rooflights - Design Simulation

    Hi Andrew, Rooflight openings are assumed to be a flat opening based on a specific percentage of the rooflight area. For pivoting rooflight openings the Opening Factor should be determined from the window/rooflight opening angle, where the minimum opening…

  • Setting up software for use in two different locations

    Product(s): Bentley Hevacomp Version(s): V8i (N/A) Environment: N/A Area: N/A Subarea: N/A Overview It Is possible to set up Bentley Hevacomp software to make the transition from using it in…

  • Locating a HOSTED activation key

    Product(s): All Hevacomp Products Version(s): V8i Environment: N\A Area: Activation Subarea: N\A Defect Number: Overview As part of the Bentley Hevacomp software installation, an…

  • How do I install Bentley Hevacomp V8i? (v25)

    Product(s): Mechanical and Electrical Designer Version(s): V8i (25) Environment: N/A Area: N/A Subarea: N/A Introduction The final version of Bentley Hevacomp V8i (v25) consists of three parts…

  • How do I download and apply the final service pack (update)?

    Product(s): All Hevacomp Products Version(s): V8i (25) Environment: N/A Area: N/A Subarea: N/A Introduction The final service pack (update) for Bentley Hevacomp V8i (v25) is available for download…

  • How do I install Bentley Hevacomp V8i? (v26)

    Product(s): Mechanical and Electrical Designer Version(s): V8i (N/A) Environment: N/A Area: N/A Subarea: N/A Introduction The latest version of the Bentley Hevacomp V8i (v26) installation…

  • Hevacomp Part L Energy Assessor courses: Now open for registration

    Hevacomp Energy Assessor (Non-dwelling) Level 3 & 4 (SBEM) Allows Hevacomp users - via an accredited Energy Assessor scheme provider - to work towards Energy Assessor status to show competency in production of EPC's using an approved SBEM interface…

  • Pipe and Duct fittings - K values

    Product(s): Hevacomp Mechanical Designer Version(s): V8i Environment: N/A Area: Netsys Subarea: N/A Overview K values for fittings are considered when pressure drop per meter is calculated…

  • Netsys annotation - displaying unusual results

    Product(s): Hevacomp Mechanical Designer Version(s): V8i (N/A) Environment: N/A Area: Netsys Subarea: Results Overview Duct or Pipe property notes show unusual or unchanging results when you…

  • RE: cable calcs

    Hi Ian, I would firstly advise making sure that your software is up to date so that you are availing of all cable types - in particular please ensure that you have the latest Content Pack installed. This is Content pack 3 which can be downloaded as detailed…

  • RE: Heat loss calculation report showing a blank page. Running Windows 10

    Hi Luis, This usually means that Crystal Reports (i.e. the program that runs in the backround to take care of Hevacomp reports) is not working properly and needs to be reinstalled. Please find details on how to do so here.

  • Duct Sizing - Fitting, terminator and connection codes

    Product(s): Hevacomp Mechanical Designer Version(s): V8i (N/A) Environment: N/A Area: Netsys Subarea: Ductwork Overview A number of codes are used in Netsys Duct Sizing reports. While some…

  • Duct sizing - allowing for a depression

    Product(s): Hevacomp Mechanical Designer Version(s): V8i Environment: N/A Area: Netsys Subarea: N/A Overview During the course of designing a duct system (these techniques can also be used…

  • Troubleshooting

    Solutions to common issues

  • RE: Hevacomp electrical Connect and Amtech difference

    Please note that further guidance on volt drop settings can be found here .

  • Hevacomp Dynamic Simulation

    Building simulation and load calculations

  • Very high CIBSE Solar Gains

    I modelled a simple 5mx5m glass box with no heat transfer across the floor or ceiling and I created a custom glass to replicate a Pilkington glass (U-Value of 0.6 and g-factor of 0.55). When I checked the solar gains using CIBSE Gains they were 10.8kW…

  • Netsys HWS Pipework Errors and Notes

    Hi there, I am struggling to find the faults with my HWS Netsys model. I keep getting different errors all over the system and some don't even make sense. One that keeps occurring on the same spot is 'spurious connection found', even though I…

  • RE: CIBSE Gain - Results Breakdown

    Matthew, you have probably turned on Temperature Rise in the Design Data tab. When you use Temperature Rise the individual loads are combined in the underlying equations and cannot be accurately split out afterwards.

  • Netsys pipe types and sizes

    Netsys pipe types and sizes
    • Pipes.xlsx

  • Run time Error 482 after Windows 10 update

    Product(s): Bentley Hevacomp Version(s): V8i (V26) Environment: N/A Area: N/A Subarea: N/A Overview After a Windows 10 update, the software may generate Run Time Error 482 when attempting to…
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