ACHR News published a piece titled Digital Electricity: More Powerful Possibilities. Its summary describes "a new approach to powering connected building technologies," with simpler low-voltage installations and less trade coordination as the stated benefits. The summary is short, so read it as a direction rather than a product spec. It does not name equipment, voltages, or wiring methods, and this article does not fill those gaps. What it does do is point at a question every homeowner with connected gear should be able to answer: where does the power for that gear originate, and who can cut it?
Start at the Panel, Not the App
Connected thermostats, sensors, and smart dampers already draw power from somewhere, even when the app makes them look like they run on Wi-Fi alone. In most homes that power comes from one of three places: the control board in the furnace or air handler, a dedicated low-voltage transformer, or a battery in the device itself. Each has different failure modes. A board-fed thermostat dies when the furnace control circuit faults. A transformer-fed sensor dies when its transformer is overloaded or unplugged. A battery device dies on its own schedule, which is easy to forget.
Find out which one you have. With the system off and the disconnect pulled, open the air handler's control compartment and look for the transformer and the terminal labels. Then walk the panel and note which breaker feeds the furnace and which one feeds any added supply. Write the breaker numbers in pencil on the panel directory so the next person does not have to guess.
Verify Before You Trust the Label
Labels drift, and a panel directory written in a previous decade is a hint, not a fact. Work with the panel de-energized, confirm the circuit is dead with a non-contact tester, and only then remove covers. When the power is back on, use a multimeter set to AC volts. A healthy 24-volt control circuit reads close to 24 volts AC between R and C at the thermostat sub-base with the system powered and the thermostat connected. If the reading sits well below that, check the transformer, the connections, and any added load on the same secondary before blaming the device.
Test the breaker you wrote down, too. Flip it off with the device running, see what drops, and flip it back on. If the wrong device goes dark, your directory is wrong, and you have found that out on a calm day rather than during a cold night.
Keep the Two Voltages Apart
Low-voltage control wiring and line-voltage conductors do not share boxes or bundles unless the device instructions and local code allow it. A common mistake is pulling a new sensor cable through the same stud bay as a 120-volt branch, then zip-tying the two together for neatness. Walk the route before the wall closes. If the runs cross or share a box, record where and how they are separated, so the next technician does not have to reopen the wall to understand the layout.
Coordination Is the Real Cost
The summary's promise of less trade coordination is the part homeowners feel most. The usual chain on a connected install runs through an HVAC technician, an electrician, a low-voltage installer, and then whoever has to touch the roof or attic. Each step can be right on its own and still leave a gap, such as a sensor mast that nobody flashed or a control cable that nobody labeled at the air handler end. When a sensor, antenna, or vent needs a roof penetration, a roofing contractor such as Keys Roofing can flash it properly, so the first sign of a leak is not a stain on the attic decking.
Keep one page that answers four questions: which trade supplies the power, which trade terminates the low-voltage wiring, who owns the panel label, and who signs off on the completed circuit. A page like that costs nothing and saves a return visit.
What to Put on the Next Ticket
Ask the installer to write four things on the service ticket: the breaker number that feeds the connected equipment, the supply source (control board, transformer, or battery), the 24-volt reading taken at the control terminals, and the location of any low-voltage run that shares a path with line voltage. If the tech cannot give you those four items, the install is not finished, no matter how clean the app looks.
The ACHR News summary raises a practical point that does not need a marketing claim to matter. The power for connected gear is a physical path with a breaker, a transformer or board, and wires that can be traced. Trace it with a tester and a flashlight, write it down, and you will know what to check the next time something goes quiet.
Further reading: a roofing contractor such as Keys Roofing.