Whether or not you can use the 16kW unit as a whole-house generator depends very much on what codes your local government has adopted. If they are using the 2008 version of the NEC (National Electrical Code), you will have to do a rather involved calculation of all the loads in the building to determine the minimum size of generator that you need.
My guess is that a 16kW generator won't be enough for a straight-up whole-house application which conforms to NEC 2008. To get that size generator to pass the code, you'll probably need some accessories that automatically shed loads, etc.
Skip is correct. Depending on your location you may be under the 2008 code. Your 16kw will be good for around 66amp continuous. Most homes with a 200amp service will not draw that large of a load but your electrician will need to do a load calculation on the house. If the calculation comes in over the 66amp. which I am sure it will, then you must start dropping off loads. OR you can follow 220.87 (2008)