For full house filtration, this system is what normally services most homes. It is recommended to have a qualified plumber fit the system, and a pressure limiting valve should be fitted (if it isn't already, most new homes have them fitted standard).
The first filter takes out any particles (down to 20 microns) and the second filter is 5 micron granular carbon & removes chemicals, tastes & odours. The sediment filter can be rinsed/hosed off every few months and lasts about a year. The carbon filter requires changing "as required" you can smell the chlorine coming back when it is spent. Most homes will get 4 -12 months depending on volume/family members etc. The filters can be changed easily by anyone (i.e., the process does not require a plumber). Takes replacement cartridge numbers 110 and 58 (part numbers).