• Is the anyway to check that a "Flat ceilling under this roof" is applied to a specific room?

    Running Hevacomp, Design Database for Heat losses. (V8 SS1 SPB (V*i SS1 CP3 (06/16)) I want to apply a flat ceilling to some rooms since they are 3.6m high but have a ceilling at 2.7m. The problem is when I click the "Flat ceilling under this…

  • Design Database doesn't load after selecting a folder

    After having loaded Hevacomp with Admin privileges - Selecting Design Database - After Selecting a folder the project explorer, shown above, minimizes as expected but nothing else happens. The following page doesn't load, I don't receive an…

  • Could not open the default project. need help urgently

  • Weather data: run-time error 62 input past end of file

    Hi, I keep having this issue with one of my models. It is not letting me go into weather data to input my weather files correctly. My global changes and fabric data work fine, it just seems to be the weather data that gives the error message as shown…

  • Error 380: Invalid Property Value when clicking on Profiles in Design Database.

    Tried the other fix in this forum downloading the MatIndex.zip file and extracting in to the C drive and still have the issue. Fabric details are appearing OK also.

  • Does anyone have experience of modelling an air supported structure to ascertain the heat loss.

    We have a project where our client is looking to provide a new air supported structure/ dome over an existing training pitch, the structure is to be heated and cooled as required. Can this be modelled using Hevacomp.

  • HEVACOMP Heat Loss Result

    Hi Good morning, For the HEVACOMP Heat Loss Calculation, is there a way to know the required supply air flow based on the calculated total heat loss from the result? I'm looking at something similar with the CIBSE gain calculation where the result…

  • CIBSE Gain Queries

    I have turned off infiltration, ventilation, occupants and casual gains from my model to test the solar load portion only. However I still see loads attributed with "Convective" and "Latent" (albeit small). Should these loads exist in my calculation…

  • HELP WITH LOAD CALCULATIONS DATA AND TRANSFERRING IT INTO TOTAL BUILDING DESIGN

    I have constructed my hevacomp model in the design database using the load calculation tab along with sizing all my mechanical pipe and duct systems using the pipe and duct sizer netsys tab. I am wondering if it is possible to transfer all this data…

  • RE: Plant Schedule

    Hello Matt, Can you clarify which software you wish to do this in? Are you talking about Design Database - PartL or Dynamic Simulation? Regards Steve

  • 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…

  • 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…

  • 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.

  • Floor Locations

    Good Afternoon All, Using Hevacomp design database (and CAD input) I have built a large 4 storey 'complex' building from the 1700's containing around 200 rooms, to get some idea of heat losses throughout the building. However, now the model has been…

  • RE: Uncontrolled heat gains

    Hello, Please post your second question regarding CIBSE Heat Gain to a separate thread and I will try to answer it there. With regard your question on Summer - The Summer calc uses Operative Temp as defined in CIBSE Guide A5 Section 1.2.2. This equates…

  • Why is the Hevacomp BRUKL Document not showing Solar Thermal Systems?

    Hi, Please would someone be able to help me. I have been trying to complete an SBEM for a client and this one part of the BRUKL document won't show up when I run the compliance section of the Part L in Hevacomp. On the roof of the building in question…

  • RE: Hevacomp - Design Database - Special Surface Types

    Hi Rob, By any chance is this a glazed door? Any door that is more than 50% glazed is considered a Window for PartL purposes. If you set a glazed area greater than 50% then we automatically treat this as a window when we pass it to SBEM. This is…

  • Part L (Simulation) not recognising changes made within Part L (Design Database)

    Hi have just been modelling a building - Level 5 EPC and I have been adjusting the air permeability and lighting information within Part L design database. Once I had the building 'passing' within Part L Simulation - I then went back into Part L design…

  • RE: Floor Level Correction -

    The workflow for correcting a finished floor level can be found in our Support Solutions here: http://communities.bentley.com/products/building/performance/w/building_performance__wiki/11959.changing-floor-heights

  • RE: hevacomp window

    Hi Tom - To expand a little on my colleagues reply; There is an extended list glazing available within Design Database - this list can be access by clicking on the Utilities button, then on the Glazing Data tab. From here, you can examine the descriptions…

  • Can't Delete Room References

    I'm new to using Hevacomp and am struggling to work out how to delete the room references that I have created but no longer need. I've been mapping out a new residential building, and had to copy some floors over in order to change the levels of the…

  • Hevacomp - DXF wont update

    I am currently using Bentley Hevacomp v8i, version 25.06.9. I have a building model that i need to update. Therefore i have copied the whole original file, with the aim of overriding the dxf with an updated one. I have tried saving over the previous dxf…

  • RE: Save custom fabric data for all projects?

    Hi, the following document from our Wiki page explains how to do this: communities.bentley.com/.../creating-a-template-project.aspx Please let us know if you have any further questions.
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