When my wife and I toured the Biltmore House, built in 1889-1895, it had ammonia refrigs.
And some steam headed piping to heat drying racks for laundry.
I told the guide that the Biltmore house was better than Disney Land (back before Disney Land went bad).
They also had a lighted indoor swimming pool and....drumroll...Flushing Toilets in all the bathrooms.