Space-Ray ADU25 Installation And Operation Instruction Manual page 51

16.4 TypeC :
32
The following figure shows the typical arrangements for concentric vertical flues, see Table 18 for 90°
bend equivalent lengths. The bends shown in the illustrations connecting the combustion air intake to the
concentric ducts is calculated into the overall length. For example a system with one additional
150/100mm Ø concentric 90° bend can be installed with 1m 100mm flue single pipe and the
combustion air single pipe as shown with 5.5m of 150/100mm Ø straight concentric flue. (8m – 2.5m
from Table 18)
Fig. 36
16.5 TypeC :
52
When fresh air for combustion and the flue outlet are from different pressures zones as shown in figure 34,
the flue outlet and the fresh air intake must not be on surfaces that are 180 degrees apart. The acceptable
configurations are those shown in figure 34 in combination with the maximum lengths listed on Table 18.
-50-
Form #44201100
Oct 2019