Got a small library, frame construction on a slab, 2 rooms of 300 sq. ft. They are currently using a 22 year old Liebert system model MME024. This is 2-ton r-22 system that has 1-stage electric heat and a steam humidifier built in.
Considering quoting a ductless Fujitsu heat pump with 2 indoor evaporators 12,000 btu's each with outdoor heat pump of 24,000 btu's, but have concerns about adding humidification and keeping library at a 35-50% RH all year round. Did I mention we are in Michigan? I know the Fujitsu will provide the heat and ac, but mostly concerned about the RH and controlling it. I have thought about adding a Honeywell steam humidifier to the air handler. Any thoughts?