What is an acceptable difference between outside and inside humidity levels when running A/C without any humidity control?
I measured 71% outside and 55% in my house, is this what's to be expected?
Is this under conditions where the AC is running a lot or was it a long time between cycles? What were the outside and inside temps at that time? Is there a lot of outside air infiltration into your home? Was there a lot of exhaust fan running, showering, clothes drying, dish washing, floor scrubbing being done at the time? Was your HVAC blower running on demand or set to run continuously?