Have heard that the black wattyl (bakers wood) will burn out traditional fireboxes more rapidly than varieties of gum.
I have just installed a Metal Dynamics branded (australian) wood fired boiler, the firebox is surrounded by water, limiting the surface temperature of the firebox to that of the surrounding water. Black wattyl is recommended for use in these boilers.
I have installed the radiators throughout the house, using 3 layer crimp piping, supplied by Australian Hydronic Supplies (cannot recommend them highly enough). I am not a plumber, just a DIY er. Was Quoted $10000 labor for the install by a plumber. I installed without assistance over a weekend.
System must be non-pressurised ie:open
I have added a simplified diagram below.
My pipes run external to the house, up to 25m. I have heat at all radiators (from cold start) in 15 minutes. My house is designed in 3 "pavillions" so this was the only logical form of heating, run 1 unit heat all.
As a bonus, I will be able to add in a heat exchanger to top up the winter hot water (evac tubes will cope on their own in summer) and I can extent the run of pipe to heat a hothouse and extend the growing season for the vegies, heat the brewing shed (happy yeast all year).
An excellent addition for those with a good supply of wood.
30 130 W Kyocera panels
Latronics LS7048 inverter
Outback mx 80 reg
12 Exide 4RP1800 batt
Apricius tube 315l H/W & gas boost
Kubota GL-9000 8.5KW diesel gen. 55amp batt. charger
Belvedere 5000 Hydronic heat, heat exch h/water boost