The honka 345 is the largest cabin in the range: 3.44 M long, built from 45 mm log, and partitioned into a hot room and a separate changing room. Two rooms, one building the 3.44 M length splits into a 2.0 M hot room and a 1.3 M changing room. That partition is what makes this cabin work for a group: the changing side stays cool, so the hot room stays hot when people come and go in rounds. It also keeps the heated volume sensible. Heat the whole 3.44 M shell and you would be looking at a much larger heater heat only the hot room and it is around 8.6 M a size a normal heater handles properly, and comfortably inside what off-grid gas will serve. 45 Mm log walls sit between the 42 mm panel cabins and the 70 mm honka 200 more thermal mass than a panel build, without the weight and cost of full solid log. Specification capacity 4 6 people external size 3435 × 2490 mm layout 2.0 M hot room plus 1.3 M changing room heated volume approx. 8.6 M walls 45 mm log weight approx. 1100 Kg what's in the box everything structural. No hidden extras to buy before you can build it: pre-cut, numbered 45 mm log walls sauna benches doors and glazing partition wall roof covering floor and foundation beams complete fixing kit ventilation grids step-by-step assembly instructions run it on gas no electrician, no cable across the garden this is the option almost nobody else offers, and for a lot of gardens it is the one that makes a sauna possible at all. A finsteam gas heater runs on a standard pro...