Hi @nort1 , I'm a first time poster here and thanks for your post first. I am planning to move to Christchurch from North Island and am in the stage of planning the build and hope to keep the house warm all year round. From my recent search, aside from Central Heating NZ's Attack wood gasification boiler, Spark Energy has many models and it seems to serve the commercial market mainly, but its boilers seem to be very good. My build will be a 150m2 principal + 75m2 secondary dwelling, separate barn as workshop/garage, 140 stud external wall (R4.1), super insulate the ceiling (R6.6), MaxRaft (R4) as foundation, triple glazing (R1.5, optimal amount of windows in the optimal places only), simple rectangular shaped houses, underfloor heating and radiators and decentralised single room heat recovery ventilation. With such a well-insulated passive house configuration, would you think I still need a wood gasification boiler (20kW/30kW/40kW)? Or should I be better off with electric underfloor heating? Material cost for electric underfloor heating (far infrared heating film) is very low and I can save on installation cost. Complicated zoning and control for electric underfloor heating are also easily done to save on running cost and compensate for the cold south parts of the house where not so much sun can reach (7.2m deep, 22mm wide rectangular house). In addition a fully automatic and programmable system together with quick warm up time are very tempting compared to a boiler and hydronic system. But a supply of free wood is also very tempting for the wood boiler option (of course capital cost of installation is very high comparatively)! If I opt for wood gasification boiler, I plan to use it for domestic hot water and possible future spa/pool heating too. I am not sure if I should choose electric over hydronic for underfloor heating and radiator as if I go electric, I may use the solarZero service for solar panel and battery. However, I am a bit worried if that free solar panel is large enough to provide enough energy for the space heating, hot water heating as well as normal household power use. Wood gasification boiler seems to be sure to keep the whole house warm (might be overkill) as well as providing for hot water and future expansion need (e.g. spa/pool). But it is most expensive and requires a lot of manual input, e.g. wood preparation and loading. What's your thought? And if I get the plan and supply of material from Europe as what you do, will there be any issue with council for approval? Your link to the Pertinger Reverse Flame Heating Stove is also very interesting! Keep us informed of any progress of your build! Thanks again.