ninsaga - to answer your question yes you have to manually load the boiler once a day with timber and depending on the efficiency of the burner and the size of the fuel box you may have to put in a second load.
Mr Tayto- we are looking at a 25-30Kw, one company were offering for the boiler for €3,500 plus VAT and the other company quoted €12,000 including VAT. Most of the boilers I've come across are imported from scandanavia or europe and I doubt they are paying 12k for the boiler. i've plenty timber so the system would suit me but i dont know anyone who has the system and before installing it would be good to get some feedback. obviously the companies all say its efficient but there's nothing like customer feedback. we're looking to install soon.