Watts Aerco INN 1060N - Page 13

Innovation Water Heaters – Edge [i] Controller
Venting and Combustion Air Design Guide
TAG-0090_A • GF-5056 • 2/20/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 13 of 39
Figure 6: All Combustion Air from Outdoors Through Single Combustion Air
Opening
The following table lists the minimum required air openings in square inches (square centimeters)
freely communicating with the outdoors for mechanical room combustion and ventilation air for
each unit. For multiple unit installations, sum the openings for the specific heater sizes.
OPENING