I will ask Ms. Garrett to add in some details on this.
You're exactly right. The replacement of the mechanical systems is a key part of making this building much more energy efficient. The closure of the courtyards also plays a part in that by removing a significant portion of the building from the exterior elements. We're also doing research with the NRC on how to effectively insulate these types of heritage buildings, which is very complex. One of the areas that will make a big difference is putting insulation in the roofline, which did not have insulation before.
I will pass it over to Ms. Garrett to add some more detail.