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Key EMF Applications Relevant to Residential Properties

1. Power Lines
Overhead and underground power lines generate low-frequency (LF) electric and magnetic fields, primarily at 50/60Hz. Residential properties located near distribution or transmission lines may be exposed to elevated magnetic fields that remain relatively constant over time. These fields depend on line load, design, distance, and environmental conditions.

For residential living, proximity to power lines is important because occupants spend prolonged periods in bedrooms, where background LF exposure is most relevant.

2. Substations
Electrical substations, transformer rooms, and internal building distribution systems also produce LF magnetic fields. In multi-unit residential buildings, substations and distribution rooms are often located on the ground floor, in basements, or integrated within shared areas such as riser cupboards or meter rooms.

Even when substations comply with regulatory standards, their presence can create localised areas of elevated LF EMFs, especially in adjacent living spaces and bedrooms. These conditions require targeted assessment to ensure clarity and transparency for homeowners, residents, and buyers.

3. Mobile Phone Masts (4G / 5G)
Mobile communication infrastructure — including rooftop antennas, street-level small cells, and macro base stations — produces radiofrequency (RF) fields across a wide range of bands. 4G typically operates between ~700 MHz and 2600 MHz, while 5G includes frequencies in both sub-6 GHz and millimetre-wave ranges.

Indoor RF exposure depends on:

  • distance and orientation to the antenna,

  • building materials and shielding characteristics,

  • antenna height and direction,

  • local network demand and traffic load.

Although typical indoor levels remain below international exposure limits, residents and buyers increasingly expect transparency regarding nearby mobile infrastructure, making independent assessment essential in residential settings.

4. Wi-Fi and Indoor Wireless Systems
Wi-Fi routers, access points, mesh systems, smart devices, and IoT platforms generate RF fields in the 2.4 GHz and 5 GHz bands. Because these sources are located inside the property, Wi-Fi exposure depends heavily on internal layout, device placement, and usage intensity.

In residential environments, Wi-Fi is one of the most dynamic RF contributors due to multiple connected devices, continuous connectivity demands, and the growing integration of smart home technologies.