A Salford planning proposal involving external air conditioning plant may need a noise impact assessment where it could affect homes or other sensitive uses. Salford Council's validation guidance asks for the site and use, noise or vibration survey results, assessment criteria linked to relevant British Standards, calculations, conclusions and mitigation. The assessment should be scoped to the actual equipment, operating times and receptors. It supports a planning decision but does not replace freeholder consent, nuisance duties or competent installation.
Decide whether an assessment is required
Salford City Council's local information requirements identify noisy machinery, refrigeration plant and externally mounted extract equipment among proposals that may require noise information. Commercial or entertainment uses sharing a wall or ceiling with residential uses are also identified. A small unit is not automatically harmless, particularly where it operates at night or sits close to a bedroom.
Discuss the scope with the Council before submission when the requirement is unclear. Provide the exact model, number of units, operating schedule, mounting and location. An assessment based on a different product or daytime-only use may not support the application actually being made.
- Identify the nearest and most exposed noise-sensitive windows and outdoor spaces.
- State maximum, normal and quiet-mode operation and whether units run together.
- Include proposed brackets, screens, enclosures and vibration isolation.
- Assess night operation separately where it is proposed.
Build a defensible baseline and calculation
Salford's checklist asks for survey details and full results, assessment criteria linked to a relevant British Standard, a subjective description of noise and vibration sources, calculations and conclusions. A consultant should choose measurement locations and periods that represent the affected receptor and proposed operating times, while recording weather, equipment and notable sound sources.
Product data must be used correctly. Sound power and sound pressure are not interchangeable, and distance-only calculations may miss façade reflections, screening, directivity or multiple units. Where the plant has tonal, impulsive or intermittent characteristics, the selected assessment method should account for them.
Design mitigation before submission
If the initial design is unsuitable, moving the unit is often more reliable than depending on a restrictive enclosure. Other measures can include quieter equipment, limited operating hours, acoustic screening, attenuated enclosures and anti-vibration supports. Every measure should be checked against airflow, fire safety, structural loading and maintenance access.
The report should state the assumed mitigation clearly enough to become part of the approved design. Commissioning can then verify model numbers, installation details, control limits and, where required, sound performance. Maintenance matters because damaged mounts, dirty heat exchangers and worn fans can change noise after approval.
Understand the wider Salford policy test
Salford's Publication Local Plan chapter on air quality, pollution and hazards says development should minimise and mitigate pollution during construction and operation and should not create unacceptable pollution levels, individually or cumulatively. Noise and vibration are expressly included. The planning assessment therefore considers the development in context rather than applying a product label alone.
Planning approval does not settle every legal or contractual issue. A leaseholder still needs any required freeholder consent, and a tenant must comply with the lease. Regulated refrigerant work requires appropriate F-gas competence and company certification where applicable. Systems with a combined effective rated output over 12 kW can also fall within the separate air conditioning energy-inspection regime.
Frequently asked questions
Does every Salford air conditioning proposal need a noise report?
No universal rule covers every proposal. Salford's validation guidance identifies categories likely to require noise information. The need and scope depend on the use, location, receptors, equipment and operating times.
Can the installer prepare the acoustic assessment?
The report should be produced by someone competent in environmental acoustics and the relevant assessment method. An equipment quotation or manufacturer's data sheet alone does not provide a site-specific assessment.
What information should the report contain?
Salford asks for a site and use description, survey details and results, relevant assessment criteria, source characteristics, calculations, conclusions and required mitigation.
Does a planning noise report cover TM44 or F-gas compliance?
No. Planning acoustics, F-gas controls and the energy-inspection regime are separate. More than one may apply to the same installation.
Related guides
Sources and further reading
- Salford City Council, local information requirements for noise impact assessments
- Salford City Council, Publication Local Plan chapter 25
- GOV.UK, company certification to work with F gas
- GOV.UK, qualifications required to work on equipment containing F gas
- GOV.UK, air conditioning inspections for buildings
How this guide was prepared
This guide was written by the Local AC Installers Editorial Team. We compare official guidance, legislation and established consumer information, separate general information from project-specific advice, and show publication dates and sources. We do not accept installer accreditation claims at face value.