BARRE — The Barre Unified Union School District has received nearly $16.2 million in pandemic-related federal funding, spent a small fraction of it, earmarked most of it, but wildly underestimated the cost of the biggest ticket item remaining on a lengthy to-do list.

On a night when the School Board’s finance committee was told the district is poised to close the books on a fiscal year that ends next week with a $2 million surplus, members learned ventilation upgrades planned at its three schools will far exceed the initial $6.5 million estimate.