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Robert O'Brien
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Articles by RobertOBrien
The cadmium sulfide cell, or cad cell as it’s more commonly called, has provided more than a half century of yeoman service, but that time may be ending soon for a couple of reasons. To…
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From unheard of to almost mandatory, the thermostat common wire or “C wire” has become a major issue.  What is a C wire? The common wire is the neutral wire from the 24V transformer that…
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What exactly is IoT and how will it affect the HVAC industry in general and oilheat in particular? “IoT” stands for the Internet of Things, physical devices that contain electronics, sensors and switches that allow…
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