Every rule your project must meet, found for you.
Search Northern Ireland’s planning and building-control guidance, ask a question in plain English, or generate a project compliance checklist — every answer cited to the source.
Working to a specific project? Generate a compliance checklist →
Answers, with citations
Ask in plain English and get an answer that links to the exact source clause — never an unsourced guess.
Scoped to your council
Overlay a council's local development plan on the Northern Ireland-wide regulations and policy.
Project compliance checklist
Characterise a project and get the requirements that apply, grouped by work area. Try it →
The library
Search the source guidance
5 results · filtered
Noise from ventilation systems
2.37NI-wide·Technical Booklet K Ventilation
To ensure good acoustic conditions the average A-weighted sound pressure level in noise sensitive rooms, such as bedrooms and living rooms, should not exceed 30 dB LAeq,T (see paragraph 2.38). In less
ventilationsounddwellingnon-domesticMinimising noise impact from mechanical ventilation
2.38NI-wide·Technical Booklet K Ventilation
The main issues in minimising the noise impact of the ventilation system are the noise from the fan unit entering the ducts, the attenuation provided by the ducts, bends and junctions, and the charact
ventilationsounddwellingnon-domesticEnvironmental noise attenuation
2.39NI-wide·Technical Booklet K Ventilation
In order to minimise noise entering the building through the ventilation system, it may be appropriate to use sound attenuating ventilation products depending on the noise level and any imposed planni
ventilationsounddwellingnon-domesticExternal Noise from Ventilation Systems
NI-wide·Technical Booklet K Ventilation
Noise from the ventilation system may also disturb people who are outside the building, so externally emitted noise should also be considered, although it is not controlled under the Building Regulati
ventilationsoundFan noise requirements
2.103NI-wide·Technical Booklet K Ventilation
All continuously running fans used should be quiet so as not to discourage their use by occupants. Guidance on noise is given in paragraphs 2.37 to 2.39.
ventilationdwellingsound