Installation
28
MAXXflo EVO
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 flow rate requirements as 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
MAXXflo EVO 90
1010 cm
2
590 cm
2
MAXXflo EVO 120
1350 cm
2
785 cm
2
4.7.6 OPEN FLuE APPLIANCE wITH MECHANICAL VENTILATION
Minimum flow rate with draught
diverters
Minimum flow rate without
draught diverters
Heater Model
Low level Inlet
High level Extract
Low level Inlet
High level Extract
MAXXflo EVO 90
360 m
3
/h
175 m
3
/h
340 m
3
/h
115 m
3
/h
MAXXflo EVO 120
475 m
3
/h
235 m
3
/h
452 m
3
/h
155 m
3
/h
