The noise from equipment, which must be limited to not impair acoustic comfort, is regulated in many constructions, by setting limits for the value of the normalized sound pressure level LnAT of the noise which is attributable to them (for a reverberation time equal to 0.5 s in the reception room).

reduction of noise made by appliances
equipment noise
must be limited
to not impair acoustic comfort
   

Some of this constructions are covered by the Order of 30 June 1999 relating to their acoustic characteristics.

In residential buildings

- for noise generated by an individual heater or individual air-conditioning unit in a dwelling, this level shall not exceed 35 dB (A) in the main rooms and 50 dB (A) in the main room. kitchen of this accommodation; however, when the kitchen is open on a main room, this level, for an individual heater of the dwelling operating at minimum power shall not exceed, in the main room on which gives the kitchen of this dwelling: 45 dB(A) , for dwellings that have been the subject of an application for a building permit or a declaration of works relating to the elevations of old residential buildings and the additions to such buildings, submitted between 1 January 2000 and 31 December 2000 and 40 dB (A) as from 1 January 2001.

- for the noise generated by a mechanical ventilation installation in a minimum flow position, this level must not exceed 30 dB (A) in the main rooms and 35 dB (A) in the kitchens of each dwelling, including the outlets

- for noise generated by individual equipment of a dwelling of the building this level shall not exceed 30 dB (A) in the main rooms and 35 dB (A) in the kitchens of the other dwellings

- for noise generated by collective building equipment, such as elevators, heating boilers or substations, transformers, water boosters, garbage disposal, this level shall not exceed 30 dB (A) in the main rooms and 35 dB (A) in the kitchens of each dwelling

Other constructions are covered by the decrees of 25 April 2003 relating to the limitation of noise.

In educational institutions (regarding equipment noise):

- for noise generated in libraries, documentation and information centers, medical premises, infirmaries and rest rooms, music rooms by an equipment related to the building, this level shall not exceed 33 dB (A) if the equipment operates continuously and 38 dB (A) if it operates intermittently; these levels are increased to 38 and 43 dB (A) respectively for all other reception areas

In hotels:

- for noise generated in the rooms by an equipment, whether collective or individual, related to the building, this level must not exceed 30 dB (A); this value is raised to 35 dB (A) when the equipment is installed in the room (heating, air conditioning)

- for noise generated in an accommodation premise by an equipment related to be building and located outside this room, this level must not exceed 30 dB (A) in general and 35 dB (A) for hydraulic and sanitary equipment in neighboring accommodation premises.

In health facilities (regarding equipment noise):

- for noise transmitted by the operation of a collective equipment related to the building this level must not exceed the following values: in examination and consultation rooms, medical and nursing offices, waiting rooms: 35 dB(A) ; in treatment rooms: 40 dB(A); in operating theaters, obstetrics and workrooms: 40 dB(A).

In any case:

ITS can perform diagnostics (with acoustic measurements on site if required) in terms of noise from equipement, and (can) offer soundproofing hardware to avoid noise pollution for the occupants of a building or for its users.

To limit the noise of Heating Ventilation Air-Conditioning (abbreviated HVAC) equipment (which often involve fans, boilers, air conditioners but also climate systems, refrigeration units and heat pumps) ITS often offers silencers, and cowlings (screens acoustics are considered in the case of equipment installed outdoors).

aerocondeser noise
(air conditioning) equipment
noise reduction device