Part of Church Street was closed Thursday morning while Mechanical Cooling Service removed the old HVAC and replaced it with a new one at the Natchitoches Parish Courthouse. Several truck loads of equipment arrived in Natchitoches about 6 a.m. to erect the crane and get ready for the installation. The old unit was a rental and weighed 2,500 pounds while the new unit weighed 4,000 pounds. Parish Pr…