2. Stove installation.
The following installation guide is a summary of the Building Regulations Approved Document J which can be found here:
http://www.planningportal.gov.uk/uploads/br/BR_PDF_ADJ_2002.pdf
If you are intending to install your roomheater yourself, then you are advised to read through the document.
Note: All our stoves are classified as ‘Open Flue Appliances’.
• Flue connections should be sealed with a suitable proprietary sealant such as fire cement or high temperature rope seal. Gunnable cartridge sealing compounds work well, and are easy to apply.
• If a suitable approved factory made system is to be used it should be installed to the manufacturer’s instructions.
• A Flue / chimney height of 4.5m should be adequate in most situations measured from the stove’s top air inlet to the top of the flue.
• No horizontal sections are allowable.
• Flues should have a maximum of 4 bends with angles of 45 degrees. And a maximum of two bends in-between each sweeping access point. [Page 22 Diagram 15].
• The flue exit from the building should be positioned to comply with the requirements of the Building Regulations. These can be seen at page 25 paragraphs 2.8-2.12 and page 26 Diagram 17
• The Flue or Chimney must be unblocked, clean and sound (no leaks), and should be professionally inspected and swept before use.
• If the chimney is too high (draught exceeds 35 Pa) or so that the chimney draught can be regulated on days with strong winds, it is necessary to fit the chimney or flue with a damper. Dampers must not be able to close the pipe completely - there must always be a minimum opening of 20% of the chimney or pipe diameter.
• No other heating appliances should be connected to the same Flue or Chimney system.
• Check the flue draught. This should be done with all windows and doors closed and any extraction fans in adjoining rooms running at maximum speed.
• There must be a constant supply of fresh air to the room in which the stove is to be installed. Fixed ventilation must be provided when installing any solid fuel stove, which has an output higher than 5kW. E.g. if you are not using a draught stabilizer then for each kilowatt over 5kW, 550 sq mm (2.56 sq ins) of ventilation is required, (table 1, page 24, Document J.)
A permanently open air vent in a window or door may be considered sufficient. These issues generally arise in houses that are sealed by UPVC windows and doors. A vent in the wall near to the woodburner will prevent cold draughts travelling accross the room and is highly recommended. It should be outside an existing fireplace.
• Extractor fans should not be placed in the same room as the stove.
Before installing the stove, you must ensure that the load-bearing capacity of the floor can withstand the weight of the stove plus flue pipe and connections.
(Building Regulations Approved Document J, Pages 31-33, Diagrams 24-27.)
If the stove is placed on a combustible floor, the stove should always be installed on a non-combustible hearth. According to building regs, the hearth should extend 225mm in front of the stove and 150 mm to each side.
None of our products exceed 100ºc at hearth level and may be placed on a non-constructional hearth directly onto the floor.
• There must be a minimum gap of at least 450mm (18'’) between the stove and any combustible materials e.g. curtains, furniture.
• If the stove is placed within 300mm of a wall, and sits on a hearth abutting a wall, then the wall must be non-combustible (usually brickwork or stone) to minimum heights of 300mm above the appliance and 1.2m above the hearth.
Please refer to Diagram 30, Page 35 of Document J for further installation dimensions and requirements for wall thickness etc.
• There is a minimum gap required between an un-insulated flue pipe and other material.
To a combustible material it must be at least 3 x the outside diameter of the flue pipe (450mm for 6” single wall flue pipe).
To a non-combustible surface or shield it must be at least 1.5 x the flue diameter (225mm for 6” single wall flue pipe).
• A minimum clearance of 80mm around the sides and back of the stove is recommended to allow for air movement and heat from the stove to enter the room.
