User manual
9
ENGLISH RAIS - Manual for RAIS POLEO & RAIS EPOCA                                     
If it is found that there is excessive draught in the chimney then either an adjustable flue 
damper or alternatively a draught stabiliser should be fitted. The adjustable flue damper 
should not close off the flue entirely but should in its closed position leave a minimum 
continuous opening free area of at least 20 % of the total cross sectional area of the flue or 
fluepipe.
Adequate provision e.g. easily accessible soot door or doors must be provided for sweeping 
the chimney and connecting fluepipe.
You should also familiarise yourself with the draught conditions for chimneys with 2 flues.
The flue outlet spigot is 150 mm in diameter. 
For strong draughts, the chimney or flue should be fitted with a draught stabiliser. In which 
case, it is important to ensure that there is a free flow-through area of minimum 20 cm² when 
the regulating gate is shut. Otherwise, the fuel energy may not be used optimally. If, at any 
time, you are unsure about the condition of the chimney, you should contact a chimney 
sweep.
Remember that access to the access door should be kept clear.










