irnbru

Thank you! Yes, I have looked, but personally I find them rather unclear.

Hi everyone! Right now I struggle to understand how the flow rate in each room is controlled. For example, let's suppose that the supply flow rate is 200m3/h, and the supply ducts goes to different rooms, like living room, bedroom, etc. How do I make sure that the air flow rate at each room terminal is the desired flow rate? Imagine that I want to supply 30m3/h of fresh air to my room while 40 m3/h to the room next to me, how is that difference in flow rate controlled? I'm using MVHR radial arrangement.

Thank you!

That looks so beautiful!! I guess I'm just gonna stick with autocad then

It's not that I can't use AutoCAD, but the produces drawing is just not as beautiful as the picture I showed. Regarding Adobe Illustrator and Affinity Designer, I have never heard of those. I will see how they work, thank you for sharing!

Well we did use AutoCAD but I don't think AutoCAD can produce that drawing (at least I don't think so)

Hello everyone! I'm wondering if there are any free software where I can draw my designed ventilation duct work. Something like the following picture (taken from the internet):

Thank you all for your help!

Thank you!! This website is really useful

Hi everyone! I'm wondering if there are any regulations on CO2 level in British standards. I've found some American standards, but my uni project is in the UK therefore I'd be grateful if anyone could provide any British regulations.

oh I didn't know such thing existed, thank you! I think for my project, one run should be enough.

Sorry...I'm really new to this. What do you mean 1 run or 2 to each vent?

mechanical engineering

Thank you so much!

Hello everyone! I am currently in a university final year project, where I am responsible for the design of the MVHR system. I am completely new to this, and I have been stuck in this for quite a while. I already have the extract and supply air flow rates, what should be next? Should I start sizing the ducts (deciding there radii)? Or is there any other thing I should do?

Oh wow! I really appreciate your input! Thank you all!

Sorry if I sound dumb...I'm really new to this. But like...shouldn't there be a way of predicting/estimating the ACH without actually having the building? Otherwise...imagine that I wanna build a house with less than 0.6 ACH, after building it, I test it and it turns out to be 4, then...should I just demolish the house and build a new one? It makes sense that there are ways of estimating the ACH to avoid that kind of situation.

Yeah I know it. The problem is that right now there are no ways we can show that our house has an air change rate less or equal to 0.6 changes per hour...

I had no idea! Thank you for sharing. I'm gonna read that. The problem is that right now we are trying to calculate the infiltration losses and we've no idea of the number of air changes per hour

As I said before, we don't have Passive Houses in the university to play with. Are there ways of predicting the airtightness? Are there softwares?

Thank you for sharing! In our uni final project, it's a house with 5 people there. We are still designing the house therefore I don't know the exact size but I think it won't be more than 200 m2. It seems that MVHR is definitely worth it.

Thank you for your recommendation!

Exactly, final year project. I don't have Passivhaus to play with...unfortunately. When you said "less more than 3ACH@50Pa", you mean less than 3 or more?

Yeah, mainly the design of MVHR system. I still know very little

Hello everyone! Thank you for letting me join this fantastic community! I am currently doing a university project related to passive house. I am responsible for ventilation part. Cheers!