Nathaniel Roe '23, Adelina Sederman '23, Kualana Kanno '23, and Sophie Edelman '22 look at the meter on a vacuum-sealed door that Michael Goetinck of Snowdog Construction had applied during an energy audit of Montgomery House. Running the fan on the sealed door showed where cold air would seep in or heat could escape in the house. (Photo by Katie Lenhart)