Apartments present a distinct set of challenges that a standalone house doesn't: neighbour Wi-Fi, neighbours' Bluetooth devices, shared wiring, shared smart meters, and proximity to cell towers serving a dense building. You can't control your neighbours' devices, but you can control how your own space responds to them — and a surprising amount of apartment RF exposure turns out to be internal rather than external once it's actually measured.
Why Apartments Are Different
The visible external source — a tower on the roof across the road, an antenna cluster on a neighbouring building — is often not the dominant exposure. Because RF intensity falls off with the inverse square of distance, a neighbour's ordinary router or DECT phone sitting the other side of a shared wall can represent a genuinely larger biological load than a tower hundreds of metres away, simply through proximity (see the Case Studies chapter's "Tower Next Door" scenario for a worked example of exactly this pattern). Apartments also concentrate low-frequency risk in ways houses don't: shared risers, shared neutrals, and shared earth systems mean your own magnetic field readings can be affected by wiring in neighbouring units entirely outside your control (see the Low-Frequency Electrical Environments chapter).
Key Strategies
- Use window film to reduce tower and external signal intrusion
- Relocate the bed away from shared walls, the most likely path for a neighbour's router or DECT base station
- Use shielding curtains if justified (see the Shielding Decision Tree before buying anything — shielding the wrong wall does nothing)
- Turn off your own Wi-Fi at night
- Use wired connections where practical
- Identify neighbour hotspots with RF mapping before assuming a source is external vs. your own — walking a meter room to room while switching your own devices on and off is the fastest way to tell the difference
Common Apartment Hazards
- Smart meters clustered in hallways or shared risers
- DECT cordless phones in neighbouring units — unlike Wi-Fi, a standard DECT base station transmits continuously at full power around the clock, making it one of the more biologically active sources in any building it's present in
- Routers placed against shared walls (yours or a neighbour's)
- High appliance density in small floor plans
- Shared electrical risers causing low-frequency (LF) issues throughout a floor
The common thread: in shared buildings, a proper assessment needs to distinguish your sources from your neighbours' — guessing wrong means fixing the wrong thing, and no amount of shielding on the wrong wall will fix a problem coming from somewhere else entirely.