Exhaust Hood Requirements; Combustible Air Supply - Convotherm OGB-10.10 Installation And Maintenance Instructions Manual

6. Exhaust Hood Requirements

a. Combi gas models MUST be installed under an exhaust hood.
b. Combi gas models equipped with the optional Flue Diverter (flue deflector) MUST be
installed under an exhaust hood.
Model OGB-6.10 OGB-6.20
OGS-6.10 OGS-6.20
P/N C2616551 C2616564
c. The exhaust hood must extend over the gas flue opening and meet the following requirements:
1) Combi gas models must be vented in accordance with all local, state and national
codes for venting gas fired appliances.
2) The exhaust hood must be sized for the cumulative ventilation requirements of all the
gas-fired appliances in the area under the hood, including the Combi.
3) If an existing hood cannot be used, a new one must be constructed over the Combi.
Model Number, BTU/HR, and Height, Depth, and Width in inches for calculating hood dimensions
Model OGB-6.10
OGS-6.10
BTU/HR 41,000
Height 34''
Depth 32"
Width 37"

7. Combustible Air Supply

a. Keep all air intake vents clear, clean, and free of obstruction.
b. Observe all applicable codes for ventilation and combustion supply air.
Combi Models and Flue Diverter Part Numbers
OGB-10.10 OGB-10.20
OGS-10.10 OGS-10.20
C2616551 C2616567
and ventilation capacity requirements.
OGB-6.20 OGB-10.10
OGS-6.20 OGS-10.10
68,000 68,000
36" 44"
41" 32"
48" 37"
18
OGB-12.20 OGB-20.10
OGS-12.20 OGS-20.10
C2616567 C2616571
OGB-10.20 OGB-12.20
OGS-10.20 OGS-12.20
109,000 136,000
44" 56"
41" 42"
48" 49"
OGB-20.20
OGS-20.20
C2616567
OGB-20.10 OGB-20.20
OGS-20.10 OGS-20.20
136,000 239,000
77" 77"
34" 42"
38" 49"