I (with the help of an HVAC professional) installed a ductless, split system. It's a 24,000 BTU, single head system. What surprised me is how much energy (relative to everything else in the house) it uses while in the off/stand-by mode.
It's on a dedicated circuit, and I calculated using my Aeotec Home Energy Monitor that it's continuously using about 130 W with no visible operation. The head/air handler is "off", no noise from the compressor, compressor fan is not moving, etc.
Is this common for systems to use this much energy in stand-by or does it indicate something may be wrong with the wiring or connections?
- My system doesn't make an off/standby distinction. There is just an off button on the remote. I use the terms interchangeably b/c while it is "off" it is still drawing 130 W of power.
- The home energy monitor uses clamps (one on each incoming 120V main line). I know it's ~ 130 W by monitoring the usage for 5 min, throwing the 2 pole breaker for the A/C, calculating the diff, and then turning it back on to verify. It appears to be fairly accurate for other circuits that I've tested (e.g. ~15 W for an LED lamp, < 1 W for an in-panel surge protector, ~60-70 W for the fridge, spikes +1000 W for the microwave, etc.)