The weight of the flue system must be supported either by a floor support, rafter support or wall support. The first step is to construct a support make sure that the support component takes the weight not the stove. The fixing can be a wall band or wall fixing bracket (to prevent lateral movement) or one of the load bearing supports as above. The flue must be at least 50mm from combustible surfaces.If the stove is on a combustible floor then it must sit on a non-combustible hearth 250mm thick and extending 150mm to the sides and back and 300mm to the front of the stove. If the stove has been shown not raise the hearth temperature to above 100 degrees then the hearth may be only 12mm thick.