Resistance factors and equivalent lengths. Each ue ex-
traction system component is designed with a
based on preliminary tests and speci ed in the table
factor based on preliminary tests and speci ed in the table factor
below. e resistance factor for individual components
does not depend either on the type of boiler on which
it is installed or the actual dimensions. It is based on the
temperature of uids conveyed through the ducts and
therefore varies according to applications for air intake
or ue exhaust. Each component has a re sist ance cor re -
spond ing to a speci c length in metres of pipe with the
same diameter; the so-called
have a max i mum re sist ance factor based on testing at 100
e max i mum admissible re sist ance factor cor re sponds
to the resistance de tect ed with the max i mum ad mis si ble
pipe length with each type of Ter mi nal Kit in stalled. is
in for ma tion enables cal cu la tions to verify the possibility
of various con g u ra tions of ue extraction systems.
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