It estimates the US commercial building sector could an additional $290 billion (£204bn) in present value over the life of a $125 billion (£88bn) investment in reduced energy expense alone.The report goes on: "Our analysis shows that building efficiency technologies are linked to a positive impact on energy expense, water expense and financing cost. In our view, investors can potentially reap financial benefits across key areas including revenue, financing costs, operating expenses, capital expenses and property appreciation.