Venting And Fresh Air For Combustion - Space-Ray ADU25 Installation And Operation Instruction Manual

13.0) VENTING AND FRESH AIR FOR COMBUSTION

These appliances may be installed with an exhaust flue fitted or without an exhaust flue fitted.
A. FLUELESS (UNFLUED)
The installation room should have a volume of at least 10m/m
radiant heater.
The ventilation requirements and calculation methods for unflued appliances are set out in the European
EN 13410 (latest edition) and must be applied. The following is guidance to the standard:
Ventilation may be achieved by any of the three following different means:
a) thermal evacuation of the products of combustion/air mixture
b) mechanical evacuation of the products of combustion/air mixture
c) natural air change
VENTILATION BY THERMAL EVACUATION
Ventilation by thermal evacuation is sufficient if 10m/m
a.
are ventilated out of the installation room.
The air/products of combustion mixture must be evacuated above the radiant heaters, if possible near the
b.
ridge, by means of exhaust mixture opening(s), (vents).
Where the exhaust mixture opening(s) can be closed, it shall only possible to operate the radiant heaters
c.
when they are open.
The maximum horizontal distance between a radiant heater and a vent opening shall be:
d.
6 (six) times the vent height in the case of wall openings
3 (three) times the vent height in the case of roof openings
VENTILATION BY MECHANICAL EVACUATION
Ventilation by mechanical evacuation is sufficient if 10m/m
a.
input are ventilated out of the installation room.
The air/products of combustion mixture must be evacuated above the radiant heaters using fan(s).
b.
It shall only be possible to operate the radiant heaters whilst the exhaust airflow is proven.
c.
The maximum horizontal distance between a radiant heater and a fan shall be:
d.
6 (six) times the fan mounting height in the case of wall openings
3 (three) times the fan mounting height in the case of roof openings
Note: Mechanical exhaust air openings must be positioned such that the burner stability of the nearest appliance
is unaffected.
VENTILATION BY NATURAL AIR CHANGE
Gas-fired radiant heaters may be operated without any special exhaust system if the exhaust gases are
discharged to the outside atmosphere by a sufficient natural air change in the installation room.
Furthermore, no provision for thermal or mechanical ventilation is required in the following particular cases:
Buildings with natural air change greater than 1.5 volumes per hour
Buildings with a density of operating heat input not greater than 5W/m
kw of installed nominal heat input of the
3
kw of exhaust air per kW of operating heat input
3
kw of exhaust air per kW of operating heat
3
3
-46-
Form #44201100
Oct 2019