For studs, then either is probably fine. There's not much difference there. However, the thinner your wall air gap is, the lower the isolation will be, so don't go too thin! The normal recommendation is to never go less than about 10cm for the gap between the inner leaf and the outer leaf (which you will have in any case it seems, with either of the options you mentioned), but a larger gap is better. Do the math to make sure you will have the correct isolation at the correct frequency range.
- Stuart -
100qm Studio in Erfurt/Germany
Originally posted at johnlsayers.com, topic 21115.
Alright, thank you very much Stuard!
Any thoughts on my AC issues in the post before?
Hey,
News time! The first part of the AC installation is done now (outdoor unit, cables and most of the copper pipes). Ventilation follows next. And we are currently also building a wall to delimit the garden section from the street.
Meanwhile I also found answers for most of my questions from the posts before.
Source for laying in curves: http://www.johnlsayers.com/phpBB2/viewtopic.php?f=1&t=19974&p=141192&hilit=condensate+pipe#p141192 A traditional silencer box will not work for this, but the curve-laying is kind of similar to that. I will try to decouple the condensate pipe by laying it in curves and also will end it inside a drainage hole of the concrete slab to avoid a outer wall penetration. The drainage hole is inside the kitchen area of the lobby.1) Condensate pipe Is there a special way how to treat those? I've read that it's suggested to lay it in curves to increase sound energy loss inside, but of course always downwards. But may it be even good/necessary to build something like a mini-silencer, through which the pipe goes or is there any other trick?
We chose the concealed duct indoor units. They are not as cheap as the wall units, but I like its advantages regarding ceiling and ventilation integration. Whether we integrate the device inlet with the room-outlet of the ventilation system (combined system) or not (separate systems), I will decide later. Maybe we even build a mechanism to switch between both.2) Duded indoor units Wall-mounted AC indoor units for multi-split systems are way cheaper (just here in Germany?) than ducted indoor units (1/4 the price). Generally is there a big disadvantage to not use a ducted indoor unit? It's nice to integrate it into the ceiling or combine it with wooden acoustic elements and to not see a wall unit at the wall, but are there any technical problems having the AC not directly combined at the fresh air intake? I've read that the air handler and AC have to precisely adjusted to each other.
Basically air seems to act similar to water in this context. I will use a Y-piece in combination with a size reduction (on one side) and a throttle pieces.3) Splitting/merging air streams I want to use one air handler for both sound rooms together. But how do I adequately split the duct to exactly split the air stream in the wished air streams? In this case a 800 m³/h air handler unit's output into 500 m³/h (to live room) and 300 m³/h (to control room)? Just using an Y-piece and adjusting the duct sizes will not be enough, I guess, due to different duct lengths, until the air streams reach the rooms. Is there a formula or calculator for doing this? Same goes for merging two air stream back to one into the air handler.
Will go for b). And here are some visual updates. Note that the garden wall is just the unfinished core wall. It is getting a natural stone wall look afterwards. Also note, that the wall penetrations of the AC pipes are not sealed, yet.Assuming having a 14cm floor construction (concrete screed and a wooden or laminate finish), should: a) the floor also be build "underneath" the doors or b) should we leave the bottom layers of wood (sole plate) of the wall construction in place to makeup for the missing height?
Some updates from the jobsite in form of pictures. Please note the picture comments.
Jan 2019
Mar 2019
Apr 2019
May 2019
Jun 2019
Jul 2019
This is very inspiring. Great work! What about your vapor barrier on your inner leaf sheathing though?
Greg
Actually, we won't do any.This is very inspiring. Great work! What about your vapor barrier on your inner leaf sheathing though? Greg