This muti-case study shows the performance results for 40+ McDonald’s locations in the northeast region of the US. McDonald’s is a fast-food restaurant chain and the number one restaurant chain in the world. The study shows how an Intelli-Hood installation was able to reduce the facility’s annual utility costs and carbon dioxide emissions. Intelli-Hood is a controls system that controls the ventilation fan speed, depending on the current conditions of the kitchen hoods. Temperature and optic sensors are used to detect heat and steam, and these sensors will change the fan speed accordingly. With the rise of utility rates across multiple locations, Intelli-Hood was the proactive strategy for McDonald’s to offset increased energy costs with efficiency upgrades.
In the chart below, Figure A, the average fan speed for the exhaust fans is shown over the course of two weeks. The dips in the chart represent times when the fans have slowed down due to reduced cooking intensity. While the spikes represent when the fans are operating at a greater cooking intensity and higher heat loads. The varying fan speed means the fans are running more efficiently rather that consistently at full speed. The average fan speed for these exhausts was 65%.
Figure B, at the bottom, depicts the customer’s annual energy costs as compared to their net energy costs. After installing Intelli-Hood, these locations operate at $73,806 on average for their utility costs. That’s a $75,774 annual savings across all sites, as compared to their previous operating utility costs.