SENKO P 7 AIR Instruction Manual page 21

Installation of horizontal parts should be avoided as much as
possible. When parts in question are those which must reach let-offs on the
ceiling or walls unsymmetrical with the stove smoke let-off, the connection
is to be executed via pipes with inclines not exceeding 45° (figure 11).
Following instructions must be followed for stoves equipped with
electric smoke expulsion ventilator:

horizontal parts must have a minimum 3° upward incline,

the length of horizontal part must be kept at minimum, and should not
exceed 3 m.

number of elbows (90° angles) should not exceed 4 (including the T-
piece) – should you need more than 4 elbows, use a pipe with internal
diameter of  120 mm),

chimney diameters exceeding 120 mm are not suitable for direct
connection to the stove, and a suitable 80 mm diameter flexible
smoke venting pipe (made from acid-resistant stainless material) is to
be conducted through such a chimney and the chimney is to be
insulated to prevent cold air from penetrating into the smoke venting
pipe!
 connecting the stove to a chimney of wider diameter will result in
increased thermal loss of the stove, with subsequent increase in the fuel
consumption !
The stove is connected to the chimney with smoke venting pipes with
minimum diameter of  80 mm (pipe length up to 3 m), OR  100 mm
(with pipe length exceeding 3 m). The length is obtained by adding the
parts of the horizontal and vertical pipes, keeping in mind that each 90°
elbow corresponds to 1 linear metre.
CAUTION!
DO NOT CONNECT the smoke venting pipe to a common
smoke venting pipe used for other heat generators (water heaters,
fireplaces, cookers and similar)  see figure 12.
SENKO pellet AIR stoves – Instruction manual
20