Installation
28
MAXXfl o EVO 150/302
Installations within a compartment ventilated directly to outside air must be ventilated at high and low level.
The minimum free area of permanently open vents must be as follows:-
Mechanical ventilation can be a combination of mechanical inlet and outlet and natural ventilation outlet. The
fans must be controlled so as not to cause a negative pressure (relative to atmospheric conditions) in the
plant room. The fans must be interlocked with the appliance. Minimum fl ow rate requirements are as follows:
4.7.5 OPEN FLUE APPLIANCE IN A ENCLOSURE VENTILATED DIRECT
TO OUTSIDE AIR
Minimum free vent area
Heater Model
Low level
High level
MAXXfl o EVO 150
1,485 cm
2
810 cm
2
4.7.6 OPEN FLUE APPLIANCE WITH MECHANICAL VENTILATION
Minimum fl ow rate with draught
diverters
Minimum fl ow rate without
draught diverters
Heater Model
Low level Inlet
High level Extract
Low level Inlet
High level Extract
MAXXfl o EVO 150
475 m
3
/h
255 - 304 m
3
/h
448 m
3
/h
158 - 207 m
3
/h
