The Unitarian Universalist Congregation of Fairfax wants to finance upgrades to its sprawling, 1960s-era HVAC system. A Fairfax County church would be the first Virginia property statewide to tap into an initiative designed to quicken affordable upgrades to greener energy. Handfuls of Virginia cities and counties have initiated C-PACE programs — short for commercial property-assessed clean energy — but no on-the-ground projects have yet materialized. The idea is to match busi