Any recommendations for air purifier / humidifier for baby ?

Honeywell has a great range of air purifiers. My parents have one at their place and they love it. They had it for years and it's still working great. It's a bit pricey, retailing at around 700sgd but it's worth the price they say. You can get it at most electrical appliance stores like Best Denki. Here's an article that can be useful if you want to invest in an air purifier. http://sg.theasianparent.com/buying-an-air-purifier-choosing-the-right-one-for-your-home/