Ventilation Openings. Machines With Gas Heating - GIRBAU ED460 Installation Instructions Manual

3.6.2. Ventilation openings. Machines with gas heating

The air must be supplied through openings in the walls of the
premises in direct contact with the outside air.
These openings must be protected to prevent entry of water or
foreign bodies.
Refer to extraction flow in Chapter 4.8: Technical and
connection details for the machine.
Figure 3.7.
Recommendations are for 2 communication openings to the
outside, one located at the top of the premises (A2) and the
other at the bottom (A1), close to the machine. It is advisable
to create the openings in opposite walls.
In the case of rectangular air openings, the longest side must
not be more than double the length of the smaller side.
The machine's exhaust duct (B) should always lead directly to
a secure outside location and never be connected to any other
duct, a chimney, a wall, a ceiling, an attic, a crawl space, or a
concealed space of a building.
Size of the A1 and A2 openings
 The minimum free surface area of the openings (Si) should be 5 cm
consumption (referred to as Hs) installed.
 For models ED260, ED340, ED460 and ED660 the minimum area for each of the openings should never
be less than 250 cm
 For models ED900 and ED1250 the minimum area for each of the openings should never be less than
600 cm 2 (93 sq.in).
 In openings protected with protective grilles, the free surface of the opening must be equal to or greater
than the minimum area indicated.
Position of the openings:
Bottom opening (A1):
 The bottom edge should be at a height (D) of less than or equal to 15 cm (5.9 in) from the floor of the
premises.
 The top edge should be at a height (G) of less than or equal to 50 cm (20 in) from the floor of the
premises.
Top opening (A2):
The bottom of the opening should be at a maximum distance (F) of 30 cm (11.8 in) from the ceiling.
(37.5 sq.in).
2
Location
2 (0.75 sq.in) per kW of nominal heat
26
Fig. 3.7
Code No. 549758
Rev. nº 10/0418