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kostas · 05-15-15, 05:03 PM

Thanks, glad to contribute.
AC, the covers are machined punched, the two small ones are shelves from the local IKEA store and the long one (kitchen) is custom made. There are more than 3200 ø5mm holes in it, which is more than enough for a single inlet. Besides, the whole ductwork is actually oversized as I used ø150mm (or equivalent when rectangular) for almost every branch, which could hold up up to 200 m3/h (118 cfm) within the safe range of laminar speed (that's 3m/sec) and thus virtually noise free. The actual flow of every branch is hardly 25 m3/h for everyday use, so I'm quite sure about having no unwanted turbulence.

05-15-15, 05:03 PM	#469
kostas Helper EcoRenovator Join Date: Dec 2012 Location: Venice, Italy Posts: 89 Thanks: 15 Thanked 41 Times in 19 Posts	Thanks, glad to contribute. AC, the covers are machined punched, the two small ones are shelves from the local IKEA store and the long one (kitchen) is custom made. There are more than 3200 ø5mm holes in it, which is more than enough for a single inlet. Besides, the whole ductwork is actually oversized as I used ø150mm (or equivalent when rectangular) for almost every branch, which could hold up up to 200 m3/h (118 cfm) within the safe range of laminar speed (that's 3m/sec) and thus virtually noise free. The actual flow of every branch is hardly 25 m3/h for everyday use, so I'm quite sure about having no unwanted turbulence.