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Shielding & remediation

Plug-in line filter (dirty-electricity filter)

A capacitive filter that shunts high-frequency harmonics on a circuit; effects are circuit-specific, can shift harmonics rather than remove them, and can raise magnetic fields near the filter itself.

filterdirty electricity

Provisional record — listed for completeness, excluded from the search index and sitemap until every value carries a primary citation. Last verified 12 August 2026.

Also searched as: dirty electricity filter, Greenwave filter, Stetzerizer filter

Form
filter
Targets
dirty electricity
Grounding required
No

Failure modes

  • Filters draw current, which raises the local magnetic field around the socket they occupy
  • Can move harmonic energy to a different frequency band instead of removing it, improving one index while worsening another
  • No recognised exposure unit to verify against; the common proprietary index is not an exposure metric
  • Fixing the source (dimmer, driver, inverter) is cheaper and permanent

Related records

  • Dimmer switch and phase-cutting controls

    Phase-cutting dimmers chop the mains waveform and inject harmonics from a few kilohertz up to about 1 MHz onto the building wiring — the classic source of what practitioners call dirty electricity.

    Sources & emitters

  • Dirty-electricity (line harmonics) meter

    Plugs into a socket and reports high-frequency harmonic content riding on the mains, the quantity used to judge dimmers, LED drivers, inverters and switch-mode supplies.

    Instruments

Sources

  1. sbm-2024 Building Biology Evaluation Guidelines for Sleeping Areas (SBM-2024) — Institut für Baubiologie + Nachhaltigkeit (IBN), 2024. ngo, link checked 2026-08-12.

Same record, other formats