SAEY FENIX / SAEY FENIX VITRO810.6011.000 / 02 58English5.2 The chimneyBefore a stove is connected to a chimney, the size and quality of the chimney must be checked toensure that they meet locally applicable regulations. The measurements may need to becalculated.The chimney must be cleaned yearly. This cleaning must take place in compliance with applicablelocal legislation.Chimney tipsThe stove can be connected directly to the chimney.The diameter of the outlet pipe must match thediameter of the connector pipe on the fireplace.We can guarantee that the appliance will work well ifthere is a hearth draught of between 12 and 20 Pa.The hearth draught can only be determined when theappliance is lit! If the chimney draws too strongly, thena damper must be incorporated.If it draws too little, then the following measures shouldbe considered:Extending the chimneyImproving the insulation of the chimney (lesscooling of the flue gases)Improving the flow of air into the space inwhich the stove is installed.Improving the air tightness of the chimney.Many problems with stoves are caused by badly working chimneys. Therefore we offer thefollowing tips. These are for information only and are not binding on us. There are just too manyunknown factors affecting how well the appliance-chimney combination works. If in doubt, youshould contact a specialist. Chimneys that have worked perfectly well with an old stove can giveproblems with a new one. The stoves of 30 years ago had much lower performance than thepresent generation of stoves which burn a lot cleaner and also have higher requirements asregards the chimney.Tips:A round channel is preferable (to minimise friction)The diameter of the chimney must not be smaller at any point than that of the appliance(except in very long chimneys where a narrower section should sometimes be included).The mouth of the chimney should be unobstructed.The chimney should be as close as possible to vertical with as few curves as possible.The chimney must not draw in extra air. Watch out for flue dampers and cleaning hatchesin the cellar or on the roof!For the chimney opening, you will need to comply with your national legislation. ForBelgium this is NBN 61-001. Here are a few rules from this standard that cover chimneyopenings: