I’m not sure if I’m ready to jump into this one yet, full force but… I am rolling some ideas around.
I’m probably less familiar with HVAC or mechanical design than I am with residential electrical, at least with electrical I do have some hands on experience. Funny how that is considering my degree is in mechanical engineering.
Is anyone familiar with WrightSoft? A Mitek company.
The design and airflow calculations and such should be done by the appointed Mechanical Engineer. Until you’re ready to do that deep dive rather produce a tool that can be used for the layout, auto sense and insert the correct item at turns and has a variety of the diffusers / split units (typical) / grilles / whatever that can be used.
Opinions expressed below are my own, feel free to comment / agree / disagree.
We should be careful that the extension isn’t too prescriptive as this is really the specialist field of the Mechanical Engineer and requirements / conditions will differ between sites / jobs / areas. This extension could come in two flavours: Engineering (Pro) version (that might be able to do the required math), and Planning (Lite) version where you can route / block out rule of thumb requirements input by the operator.
The range of mechanical equipment is probably too vast to cover and may bloat the extension with all the libraries required.
Having said that, a system that you can size/choose HVAC ducting (rigid square, rigid rectangular, rigid round, flexible round) from commonly used sizes would be beneficial. The input method should also be flexible (offer opportunity for manual input). Don’t forget the space surrounding ducting for required bracketing to both keep the ducting together and fit it to the structure (they are different components). Also, offer option of customised thickness of insulation (sound attenuation and thermal options).
When it comes to grilles / diffusers, the same type of flexibility in interface design and options should be considered. A range of generic components (possibly dynamic components?) would suffice.
If one wants to exchange these for product specific ones then the user could do it as they see fit with models / components they supply. This may also be a possible revenue stream to get manufacturers to supply these models (or link to online repository in the background) and “advertise” using the extension. However the extension should not get locked into any specific brand / supplier.
Obviously, as per Medeek extensions usually spoiling us, be able to assign custom materials & layers (now tags since SU 2020) and custom layer / tag names to the various levels / kinds of entries.
*** EDIT ***
These don’t need to do auto cutting of walls / ceilings / whatever, that function can be performed by the operator using the tool of their choice.
Hi Nathaniel! So we are looking into Wrightsoft to work with our HVAC company to better control/design (assist them) in our custom homes we build (6D BIM), and of course my first thought was an extension or SU integration with them, so I Googled it and of course found your thread
Did you ever pursue an extension?
Your mission, should you choose to accept it, will be to integrate Sefaira Analysis once you have Medeek HVAC - and add heat generating loads to Medeek Electrical.
Once you have these - and perhaps add spray foam (open and closed cell) to Wall and Truss - and mix in the user properly Geolocating their models - I think you’ll have everything Sefaira needs. Not sure of this as I’ve never used Sefaira!
This thread has sat dormant for a while as I have focused on the Floor plugin the last few months and then bounced between upgrades to the other plugins as time allowed.
I’m now back, thinking about what would be an effective way of putting something together for HVAC, primarily I want to start with the most important part which is the ducting tool. This needs to be very easy to use (non clunky) and then once the initial paths are created it needs to be very flexible so various transitions can be easily configured and changed. The gears are slowly turning.
The round to rectangular transition is much less complicated than I originally thought but I still have a lot of research and study to do on this subject. The number of possible transitions and junctions is a lot more than I originally thought, this is going to be a deep rabbit hole.
simpler is better - draw the hvac bits based on parameters provided, but skip the calculations (per Julian Smith). what would be ideal is to draw the schematic first, then place the components along way switching between views - plan and 3D - you have both formats already in place (i.e. the 3D componet contains the schematic icons much like switch symbols etc).
with my own current library and approach - i draw lines centered on what will be the ducts (my components have alignment marks), then i place components (many of which are dynamic to faciliate duct and volume sizes) and then draw the ducts to connect - either create pipeline plugin for round, or simple rectangles on a start point and then extrude or follow me.
After digging through some more manufacturer’s websites I’ve learned a bit more about ducting but I am still a newb. With the round to rectangle transition it can be further complicated by offsets (both X and Y). Fortunately the math involved and the modeling isn’t any more complicated, at least not at first glance.
I’m still divided about whether to pre-model a bunch of transitions, registers and vents or to simply model them on the fly with a number of pre-cooked algorithms. I find that bringing in SKP files can be a bit slower so there is the performance hit to take into consideration. I will need to give this some further thought.
When it comes to HVAC I’ll be the first to admit I know next to nothing. This isn’t a subject that is ever covered in mechanical engineering school (BYU Grad '98) and unless you specifically work as an HVAC installer or as an engineer on larger commercial projects you probably won’t have a lot of exposure to this industry.
Back in 2005 for a couple of months I had a short stint working for BYU as a facilities engineer and I did get to look at some very large air handling equipment and some very cool duct work and industrial piping (insulated in asbestos). However, I was only hired on part time to do some CAD work and once the project ended I decided to move on to Washington to pursue my fortunes in the much higher paying aerospace industry.
My main focus with this plugin is residential work but as things progress I’m sure I will stray into the more commercial end of things as well, we will see.
At this point I’m still testing a few proof of concept ducting ideas, I will dive into the weeds soon enough but a intuitive and easy to use ducting tool is the beginning of this plugin: