Blaze B520 Dimensions & Clearances
The dimensions shown in the B520 Clearances represent the minimum clearance to combustible materials refer to AS/NZS 2918
Blaze B520 Hearth
The dimensions given in the installation diagram are the minimum required for the floor protector. It may be desirable, eg for aesthetic reasons for the floor protector to be larger than these minimum dimensions. If the appliance is installed above 250mm from the floor line then the floor protector shall be constructed of 7.5mm minimum thick fibre cement sheet and 300mm from the door opening. If the appliance is installed below 250mm from the floor line then the floor protector shall be constructed of either (A) 15mm min thickness fibre cement and 400mm from the door opening or (B) 115mm Brick and 300mm from door opening.
It may not be laid directly on a combustible floor.
For more details and variations on floor protectors refer to AS/NZS 2918:2001 Clause 2.2, 3.3.1 and 3.3.2
Overall average efficiency burning hardwood is 65% as tested by
Adelaide Heating Technology