heat pump

Ghosts in the Radiators: My Crash Course in Home Heating

It began with a gentle whine, so slight that it required the temporary suspension of respiration and a fractional tilt of the head at just the right angle to be sure I was even hearing it. This was followed by a wide range of puzzled expressions, ranging from game show contestant to village idiot (admittedly not a large leap) as I wandered the house trying to pinpoint it. The refrigerator? No. That whines too, but at a lower frequency. This whine was so high that it was just within the range of my early-middle-aged auditory receptors.    » read more »

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