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Given the rarity of this document, legitimate sources include: Horstmann Radio Telemeter Series K Manual.epub
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The "Radio Telemeter" series represents the company’s foray into wireless switching—an innovation that predated modern smart home technology by decades. Before Wi-Fi and Bluetooth became standard, engineers relied on robust radio frequency (RF) signaling to control heating and lighting systems remotely. This was particularly vital in large estates, commercial buildings, and tower blocks where running physical wiring between boilers and control points was cost-prohibitive or structurally impossible. Horstmann Radio Telemeter Series K Manual.epub