• CIBSE Gain calculation - Why are there blank lines in my Gain results?

    Product(s): Hevacomp Mechanical Designer Version(s): V8i (N/A) Environment: N/A Area: N/A Subarea: N/A Overview Results for CIBSE gain, Carrier gain and Airah gain contain a number of blank…

  • Calculations - Occupancy and heat gains

    Product(s): Hevacomp Mechanical Designer Version(s): V8i (N/A) Environment: N/A Area: N/A Subarea: N/A Overview The number of occupants and activity with which they are employed will have an…

  • CAD mode and Room data mode

    Product(s): Hevacomp Design Database Version(s): V8i (N/A) Environment: N/A Area: N/A Subarea: N/A Overview Describing the difference between CAD and Room Data mode. Method There are two…

  • CIBSE Gain Calculation - Load types

    Product(s): Hevacomp Design Database Version(s): V8i (N/A) Environment: N/A Area: N/A Subarea: N/A Overview The following is a breakdown of components that make up the gains in the CIBSE Heat…

  • CAD Model Design - Adding atrium style spaces to a project

    Product(s): Hevacomp Design Database Version(s): V8i (N/A) Environment: N/A Area: N/A Subarea: N/A Overview This document provides guidance on modeling Atrium type spaces in Design Database…

  • CAD Model Design - Adding different roof section types

    Product(s): Hevacomp Design Database Version(s): V8i (N/A) Environment: N/A Area: N/A Subarea: N/A Overview The roof construction fabric can be changed as you are adding roof sections. Method…

  • 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.

  • RE: CIBSE Gain - Results Breakdown

    Hi Matthew, It sounds like you may be looking at the Summary report? If you click on 'Full' in the bottom left you should see such a breakdown of the results. Further guidance on each of the individual loads can be found here.

  • CAD Model Design - Gap Between Roof And Walls

    Product(s): Hevacomp Mechanical Designer Version(s): V8i (N/A) Environment: N/A Area: N/A Subarea: N/A Overview When modelling a roof in Hevacomp a space can sometimes appear between the roof…

  • 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 Zone definition

    Hi, The best way to zone your building largely depends on what results you require. The following excerpt from the manual may help to clarify: Rooms can be placed in particular zones and floors so that zone and floor sub-totals can be selected and…

  • RE: Modelling variable wall construction in single element

    Hi Roy, it may depend on the type of calculation you are doing as to the best solution. The simplest option is to create an Exposed Wall in Fabric Data using the layer data for the above ground wall. Once created you can adjust the calculated U-Value…

  • RE: Level 5 DSM SBEM & EPC; .

    Hi Shaun, to simulate the atrium space you would need to draw the rooms as usual, but name them according to your Atrium Keyword (in Simulator > Design Data > Atrium Spaces). For Example if your keyword was ATRIUM, then the rooms should be named ATRIUM…

  • RE: Walls, partitions and sections

    Chris, to extend on Duncan's answer you should consider the following. Steady State calcs such as CIBSE will consider the temp on the other side of a partition. When using CAD Input this will default to the design condition specified for the adjacent…

  • RE: Glazing data

    You can also change all, or specific glazing for the project by using the Global option on the main Design Database menu. This allows you to make changes for specific rooms\all rooms. You can also restrict changes to only change existing glazing of a…

  • 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…

  • Version 26 - Run Time Error 380 in MAT after installation

    Product(s): Hevacomp Mechanical Designer Version(s): V8i (25) Environment: N/A Area: N/A Subarea: N/A Introduction NOTES: This is applicable to older installations of V26 only You do NOT need…

  • RE: Hevacomp Weather File Error

    Hi Michael A quick follow up to my colleagues response above. Once you have set up the correct permissions to the software, you may need to reset your project's weather location so the project can function correctly. Load up your project. From within…

  • 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

  • Version 26 - Run Time Error 53 in MAT after installation

    Product(s): Hevacomp Mechanical Designer Version(s): V8i (25) Environment: N/A Area: N/A Subarea: N/A Introduction NOTES: This is applicable to older v26 installations. You do NOT need to un…

  • gbXML and Design Database - hints, tips and hang ups

    gbXML (Green Building XML) is a very useful format for transferring building models across a number of platforms. Bentley Hevacomp's Design Database contains a gbXML import that allows you to take advantage of this facility, but you should be aware there…

  • DXF Import Issues - Drawing is too large error

    Product(s): Hevacomp Mechanical Design Version(s): V8i (N/A) Environment: N/A Area: N/A Subarea: N/A Overview This document details what to do should you encounter the following "Drawing is…

  • Editing project data - Default Data vs Global Change

    Product(s): Hevacomp Mechanical Designer Version(s): V8i (N/A) Environment: N/A Area: N/A Subarea: N/A Overview This document provides guidance on the difference between CAD Input Default Data…

  • CIBSE Gain calculation - Solar gains at night

    Product(s): Hevacomp Mechanical Designer Version(s): V8i (N/A) Environment: N/A Area: N/A Subarea: N/A Overview CIBSE Gain results can often display Solar Gains at night, for example: Explanation…
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