I'm designing a MVHR system and would like to know how to calculate both the air intake and supply air / return air and exhaust air as separate systems. As you can only place a system marker at the end of each duct how do you achieve this using Netsys…

https://communities.bentley.com/products/building/performance/w/building_performance__wiki/31381/pipe-sizing---water-content-for-heating-and-cooling-emitters On the page above it implies you can change emitter type for your water content calculation…

Hi, Its been a while since the last time I used Hevacomp so apologies if the questions seem trivial. I am trying to model a relatively large project, I have already placed all my emitters (some ceiling void, some floor level). When I try to connect…

I have a run time error 11 appearing when sizing heating pipework in netsys. I had previously sized the system with no issue, however made some amendments and when re-running it the error has appeared. Could anyone assist as I currently can't access…

Hi, Is it possible to have a new pipework type on NETSYS, heating? I need to use the attached details below for the modelling. Please refer to the attached file for reference. PDF Please, if you have other resources that you use with this type…

Could some one please help in how to change the height of an Emitter on Netsys heating and chilled water?

Hi, I am getting an error when I try to size the system in Netsys Ductsizer. After drawing the system I am met with 'Duct with system marker is not the start duct for the system'. (See attached) I have tried putting the system marker in various…

Hi, I'm having an issue when setting up a Netsys calculation and Importing a DXF. I get a pop-up reading 'Unable to access file' followed by 'Vectors not read in'. This results in the DXF not being imported. I also set up a CIBSE gain calc and managed…

Hi Understood the below links gives K-value for some of the fitting however, it doesn't show the assumed value for different default bends and tees . Please could you be able to post the k vale for the default connection fittings. i want to verify the…

HI I HAVE A DUCT PASSING VIA RISER FROM L1 TO L6 AT AN ANGLE OF 45 DEGREE OR SAY NOT IN A 90 DEGREE VERTICAL WAY. PLEASE COULD YOU BE SO KIND TO DEMONSTRATE HOW THIS CAN BE MODELED. MANY THANKS

Hi This is my first project in Netsys Ductwork Please could you be able to answer below questions 1) If you have two ducts at same height level and inter-crosses how do you design bends to avoid collision? 2) How do you model branching duct at…

Is it possible to copy outlets between CWS and HWS in Netsys? This would save a lot of time. Thanks

Hi All, I'm trying to calculate the pressure drop for a chilled water system which starts with 250mm diameter pipe and reduces in size before it reaches the emitters. The issue i'm having is that even though I've fixed the pipework size for flow and…

Good morning. This may be a function i am missing but is there a way to split pipe sections? I am creating a header pipe in Netsys Gas and the last part of the header always takes on the properties of the last connection. For example in the schematic…

I am doing a ductwork pressure drop through Netsys. I have manually fixed the ALL duct sizes but the software appears to be selecting new ones in a number of instances. How can I stop this from happening? Many Thanks Craig

Hi, I've modeled a BCWS in netsys, the system connects fine, however the output table for the system is fine, however pipe notes display different sizes. And sizes that don't exist on the sizing criteria selected (copper old X) Any ideas? Thanks…

It's been some years since I used Hevacomp and am now considering purchasing for my mechanical team. Can someone explain to me if it is now possible to consider diversity and variable flow in the piped and ducted systems? If for example, we consider…

I am Inputting the CIBSE Guide C pipework velocity limits into NETSYS, i am unsure how to input the velocities in the system marker. Any assistance would be greatly appreciated.

Hi I have created a HWS system consisting largely of en-suits of bedrooms. Each en-suite has a two number of basins and 1 shower nozzle. They are calculated using the same method (BS EN 6700), and have the same loading units. They branch coming in…

When trying to add a pipe header into a Netsys project, firstly I can't seem to edit the length/size only the rotation and secondly once the header has been positioned and supposedly connected to the emitters and a system marker, it comes up with an error…