Air passes through the doors, windows, walls, foundation,
roof and floor of the facility your business occupies. A certain amount of air
movement is necessary for health purposes, but in many buildings excess ventilation
accounts for a large percentage of total energy losses.
You need to deal with the structural integrity of your building
first, because it doesn't make sense to upgrade your heating and cooling system
without doing everything possible to preserve the gains such improvements will
create.
