Around this time last year I fitted a kitchen maid airier to the space above our stairs and I thought I'd do a "year on" post on how useful we think it is.
It's been brilliant, it holds a full load of adult washing (baby washing needs miles of drying space as it's all so small). The heat from the fire goes straight up there from the living room and when it's going, it dries within a day. It was also really useful in the summer, if the weather was a bit touch and go you could remove the risk and hang it up in the house to dry.
I'm so glad I bothered to put this in, it uses up a wasted space in the house, saves us using the tumble dryer and doesn't even look that bad - in fact it's been a talking point when people have come round! If you struggle to dry all your clothes without covering every radiator in the house then take my advice and fit one of these! (I should try to get some commission before I post this!)