Nige, I agree with you about the cost of restoration of the windows, from the photos I have found there do seem to be many to deal with, and one wonders why the nuns chose the cheapest and easiest way to deal with them rather than do a decent restoration on the glazing. No doubt government incentives made this the most affordable option, but the fact that they did anything at all makes me think there was a serious problem that had to be addressed immediately. It will not be inexpensive to do a proper restoration in this respect.
There is a central heating system though, in a couple of the photos I have found there are central heat registers, whether or not they or the boiler are functional I can't say from a picture, but at some point in the early to mid 20th century it was plumbed for a central boiler. At http://www.property.ie/property-for-sal ... ry/589447/
you can see in photo 9 left and next to the fireplace a cast iron heat register, in photo 10, the salmon/coral drawing room you can see them under the windows.
Of all the houses/properties I have seen for sale on the internet over the years, if I were a wealthy man this is the one I would buy and bring properly back to life. The location, the elegant lines, the sheer massiveness of it's presence, like an anchor in the world that rootless Americans like me never can really know. My father was from that region, Loughrea, Ballinasloe, Rosscommon, Athlone, and the family is all still there. Born in Galway, turned 21 on the boat over in 1949. Slevoir House is really an icon to me. If it were 2 million euro to buy and another million to restore it would be worth it, though I wonder what taxes would be, I have no idea what kinds and what amounts property related taxes in Ireland are. Here it is different depending on the state you live in, California for example limits property taxes to 1.5% of the value of the house per year, New York property taxes are a bit higher but they also levy a seperate school district tax that is often higher than the property taxes.
Next time I am in Ireland I would love to go to Slevoir and see the place, if nothing else from a boat on the lough should it be sold and in private hands again.