The exhibition cases feature models of housing projects at the same scale. One might think that an easy way to increase density is to add more floors to a building. But these projects show that more height does not necessarily mean more density. The “people per acre” density calculations for these projects – left to right: Queensbridge, Penn South, and Silver Towers – are 189, 302, and 76 ppa. That is because lot coverage and unit size are factors affecting the average density.