apartment therapy changing the world, one room at a time

I think things made with stained glass look nice in a sunroom. They allow the light to filter through.

a sofa, a rug, and a wood stove.

I don't know how practiacal a wood stove would be in an apartment, but an electrical "hearth" might work. As for the rest of it, perhaps you could provide photos of the living room?

I either think "magazine reading on a lounge" or "dinner for two" at a small table when I see spaces like this (I guess called a three-season porch).

(My point being, pick a function, then address accordingly. Seems perfect to run a rectangular table down the middle, or two love seats facing each other).

But when you say no heat, so you have to be careful what you put out there, would it really prevent you from putting say, a table and chairs out there?

I think sunrooms are like patios and verandas in that they are spaces that bring the outdoors in. You could fill it with plants in beautiful pots, then, as recommended by Patrick (the other one), either have a lounge/day bed or table with two chairs.

When it is too cold to use it as a space it will function as a lovely green backdrop to your living room. The tiled floor would work well with plants. I would also choose a warm paint color to go with the greenery.

I once proposed a plan for a sunroom like this that was based on two colors, cranberry and raw Belgian linen (and a bird-themed toile of those two colors from Ballard Designs) with the thinking being there would be a predominance of one color/fabric in warm weather (the linen), and the cranberry (in twills and velvets) in colder months, with the toile accent being the constant. It worked perfectly with some of the upholstery fabrics at Pottery Barn and a two-toned sea grass rug they used to carry that was flecked with cranberry (but alas, which they carry no more).