Mine also. Useful for many purposes.
There are 33 powered Macs in two adjacent studies here, all attached to a single 15A (circuit-breaker) line. About six of them have no provision for TRKL voltage, but it is extremely rare for as many as six to be fully booted and active at once, so total current demand is never within coo-ee of the trip current for the circuit-breaker. On the only two occasions in seven years that the CB has tripped, it was failure of a lamp in the overhead 4 x 50W halogen lighting fixture that was responsible.
But the combined effect is a useful couple of degrees Centigrade more comfort on winter nights, in this admittedly temperate marine climate.
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