Innovation Series & ReCon Water Heater
GF-5050
Venting and Combustion Air Guide
TAG-0043_0Q
12/01/2016
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, New York 10913
•
Phone: 800-526-0288
Page
13
of
39
2. When communicating with the outdoors through horizontal ducts, each opening shall have a
minimum free area of 1 inch
2
per 2,000 BTU/hr. (654 mm
2
/0.59 kW) of total input rating of all
appliances in the space (see Figure 5).
Figure 5: All Combustion Air from Outdoors – Through Horizontal Ducts
2.3.2. One Permanent Opening Method
One permanent opening shall be provided, commencing within 12 inches (305 mm) of the top of the
enclosure. The appliance shall have clearances of at least 1 inch (25 mm) from the sides and back of
the appliance, and a clearance of 6 inches (152 mm) from the front. The opening shall communicate
with the outdoors directly or through a vertical or horizontal duct to the outdoors or spaces that freely
communicate with the outdoors (as shown in Figure 6) and shall have a minimum free area as follows:
•
1 inch
2
per 3,000 BTU/hr (654 mm
2
/0.88 kW) of the total input rating of all appliances located
in the space.
