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If any, air intake inlets will feature a sound reduction index Dnew of 36 dB.

The ducting system will be separate from the one of the dwellings. It will feature primary silencers on air intake and exhaust, as well as supply and return air. While the exact dimensions will of course depend on the geometry of the layout and the sound power level of the AHU, an indicative length of 2 m is common.

Secondary silencers will be needed in order to prevent sound transmission between spaces by means of the ducting layout. Once again, while the exact dimensions will of course depend on the geometry of the layout, an indicative length of 2 m using an absorptive flexible duct and junctions that are at least 2 m distant from each other is common.

Bar-Restaurant

The ducting system will be separate from the one of the dwellings. It will feature primary silencers on air intake and exhaust, as well as supply and return air. While the exact dimensions will of course depend on the geometry of the layout and the sound power level of the AHU, an indicative length of 2 m is common.

Secondary silencers will be needed in order to prevent sound transmission between spaces by means of the ducting layout. Once again, while the exact dimensions will of course depend on the geometry of the layout, an indicative length of 2 m using an absorptive flexible duct and junctions that are at least 2 m distant from each other is common.

A specific smoke exhaust layout will probably be required by the fire department. It usually cannot be outfitted with a silencer, and therefore it must not be used in normal operation. This means it will have a thoroughly insulated duct (for acoustic/thermal/fire purposes) and a slaved trapdoor at the bottom. In addition, there will be a need for fresh air; this can be achieved either through the entrance doors (but be aware, the fire department will often reject the use of air lock-mounted doors!) or through a specific set of slaved air supply doors that must be properly specified (e.g., here, a sound reduction index of 50 dB is a minimum).

Workshop

The ducting system will be separate from the one of the dwellings. It will feature primary silencers on air intake and exhaust, as well as supply and return air. While the exact dimensions will of course depend on the geometry of the layout and the sound power level of the AHU, an indicative length of 2 m is common.

A specific smoke exhaust layout will probably be required by the fire department. It usually cannot be outfitted with a silencer, and therefore it must not be used in normal operation. This means it will have a thoroughly insulated duct (for acoustic/thermal/fire purposes) and a slaved trapdoor at the bottom. In addition, there will be a need for fresh air; this can be achieved either through the entrance doors (but be aware, the fire department will often reject the use of air lock-mounted doors!) or through a specific set of slaved air supply doors that must be properly specified (e.g., here, a sound reduction index of 50 dB is a minimum).

 
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