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UK IRL
Appendix B: Flue restrictor
Determining of the right flue restrictor:
• Calculate the total horizontal- and vertical length of the flue, according to the
calculations displayed above
• Determine according to the table the right flue restrictor size
• When meeting an X, and when the values are outside the table, the combination is
not allowed
• Normally the 30 mm flue restrictor is preinstalled
Horizontal length (m)