Product review (5 stars): Broan PM390 Power Pack
I had the broan 240 hood insert which is a cheap version of the pm390 and didn't work very well. This unit is more  presentable looks sturdy, better made. Extracts the smoke the way we expect and so far is working well. I'll like to see what happens with time and see if it delivers the service expected from a unit like this. I'll recommend it to my friends and family.