Figure 2: Design Option 1

Figure 2: Design Option 1: Makeup Air Equals Cooling CFM
Figure 2 illustrates the system described in the scenario above where the kitchen cooling load is 2,000 cfm and is provided by a dedicated makeup air unit that does not recirculate any air. The balance of makeup air is provided from the Dining area zone. The unit serving the Dining unit brings in outside air to satisfy the Dining zone ventilation requirements. General exhaust requirement such as bathrooms only exhaust 2,500 cfm of the total ventilation 5,500 cfm. 3,000 cfm of air would other have to be relieved from the space. By transferring this air resource into the kitchen, energy is conserved from otherwise conditioning more outside air. Kitchen ventilation requirements are provided by the kitchen unit