Craig Christensen

Hi Kingsley, The latest minor release of Ventsim, version 5.4.4.4 has a fix in it for this bug. You can find it here: https://ventsim.com/download/minor-releases/ Or direct download from this link:https://ventsim.com/files/vvsetupminorrelease54.exe

Hi Kingsley, Thanks for letting us know. I have found the source of the bug and fixed it in our pre-release code, so this will be fixed in our next release. I will let you know when it is available to download.

Hi John, In the error message it indicates that the system is running out of memory. Can you open the task manager with the model open and check how much RAM is in use when you attempt to change the view? Would you be able to send us the file to see if we can recreate it or find out why it is happening with your model? It might be fixed by adjusting the grid size so that it has a smaller amount of grid lines to create:

Hi, This is probably due to a mismatch between the coordinate system used in Ventsim and the system used in your DXF. You can adjust your coordinate system in Ventsim in the Settings -> Settings -> Graphics Settings -> Coordinates. There you can adjust the coordinate centre points and North direction as needed. You can also adjust these in the step during importing the DXF and it will move the incoming DXF data by the offset amounts entered: If you are having a lot of trouble with this you can email us at Ventsim.Support@howden.com with some screenshots of what is happening and we can take a look at what you might need to adjust to get them to line up.

To change the units in Ventsim just open the Settings menu and you will see Units third one from the top. This opens the Units form where you can change any unit setting in Ventsim. You can also use the Metric and Imperial buttons at the top to set all units to one or the other's default unit. For what you are looking for, you should find the cfm unit already available in the Quantity setting. You will find some options have several built in unit types to choose from, but you can also add a new unit setting. To do this, click on the name of the value you are setting the unit for and it will open a list of unit configurations where you can enter the new unit text values and set their multiplier or addition values to complete the conversion to your desired unit from the base metric unit at the top of the list. You will see a preview calculation on the right column.

Hi Kevin, We have added a new feature in the latest minor release that can be found here: https://ventsim.com/download/minor-releases/ in version 5.4.3.5 An example of how it works: In the Metal Mine demo model, this airway here might want to be rotated to look neater (I think this is what you are looking for): There is a new property on the airway called Rotation. If we set that to a value we can spin the airway around on it's axis to make it look neater: The angle or rotation can be a negative or positive value. The result of adjusting that looks like this with the airway now appearing more square with it's connecting airways: Hopefully that is the kind of thing you are trying to achieve! Regards, Craig

Hi John, Send us an email at ventsim.support@howden.com and I can help get you started with a script to build the database on SQL Server, or if you just use a .VLG file format Ventlog can make that for you when you install it and choose a New Ventlog Database as the option then run through the initial setup wizard (You don't have to enter everything during the wizard, you can fill things in later on too). Regards, Craig

Hi John, Not sure how that bug got back in again, but it's fixed again now. There is a new minor release out now with this patched as well as a few other new features. The same link as before should work: https://ventsim.com/download/minor-releases/ Regards, Craig

Hi Andre, Can you try adjusting the message box sizing on the scale manager? This one here: For the Ventlog error, if you would like we can do a remote support session to have a look at this with you? Send us an email at ventsim.support@howden.com and we can start a remote support session with you.

Hi John, Sorry I should have let you know where to find the link for the minor release. Try this link: https://ventsim.com/files/vvsetupminorrelease54.exe for the direct download. To see minor releases in future check this page: https://ventsim.com/download/minor-releases/ These are for quick releases to address a bug in between the full releases that prompt everyone to update. Let us know if you still run into any trouble after using this version. Regards, Craig

Hi John, I think this might be to do with the form opening in a smaller size to begin with and then having the anchor points of the chart stuck in below the buttons at the bottom. We have just released a minor update to Ventsim (version 5.4.1.2) and I have changed the way the anchoring works for the charts in this version, I have also changed the minimum size the chart can be shrunk to, so that it should work with smaller edit box sizes before the bottom is cut off. If you still see this happen in this new version let us know and we will take another look at it. Regards, Craig

Hi, Are you using the latest version (5.4.0.5)? I will try to recreate the issue and see what the fix will be. Are you able to email the file to us at ventsim.support@howden.com (or just part of the file with the airway)? Regards, Craig

Hi, we just uploaded a new version of the student edition (version 5.2.8.3). Try download and install it again now and it should fix this issue.

Hi Davood, VentLog doesn't connect to existing datasets like you have here, it uses it's own database format (which can be stored on an MS-SQL server) and it is for recording station data from ventilation surveys. Liveview will be okay for showing data from this data set, but you are right in that it doesn't have any trending ability and only shows the most recent "live" data. One thing we could look at is converting your existing dataset to a Ventlog database, but if you have a continuous feed in from sensors, then Ventlog probably isn't the right tool for this job. However if you just want to look at a set of data up to today, we can see how easy it might be to convert it to a Ventlog format database for trending.

VentSim Design 5.0 has some significant improvements to the Ventlog feature set and also to the speed that station data can be mapped and displayed in your model. You can now import stations, view trends and compare data, move stations, create new stations and add new records to your Ventlog database all directly from VentSim Design. New Ventlog features: Mapped Ventlog data can now be selected as a display option for both colour and text in Ventsim: The new Ventlog Comparison tool allows you to compare recorded Ventlog data with simulated results: All historical records for every Ventlog station can now be viewed in either a chart Or in datatable view where records can be edited if needed: The new “Hide Station” feature allows you to remove the station from future imports to VentSim Design. When adding a new station to Ventlog directly from VentSim Design, the Group and Level info can now be recorded. You can also use the Link Existing Station feature to map a station that already exists in your Ventlog database but could not be matched to any airways due to missing or incorrect co-ordinates. You can also use Link Existing Station to move an already mapped station to a new location. When moving an existing station you can either leave the previous records assigned to the old airway (this would be handy if you are using a temporary recording station and you don’t want the historical data to be mapped to the new location) or you can move all existing records to the new location (if you are fixing a mistake).