Any recommendations for air purifier / humidifier for baby ?

I would recommend the BioCair, it works as a humidifier, air purifier, and even as a disinfectant. It is definitely worth its price. There are also health benefits which is good for you and your family. I have friends who are using it and has been giving good feedbacks. Check out Mothercare or even roadshows, you can get it with a more affordable price. http://biocair.com.sg