Work to overhaul the 17-year-old heating and cooling system at the West Des Moines City Hall has prompted the relocation of some city offices. The city’s parks and recreation department on Tuesday temporarily moved from City Hall to the library, 4000 Mills Civic Parkway. In addition, the planning and building departments are relocating to the first floor of City Hall, 4200 Mills Civic Parkway. Other departments are moving within City Hall. Visitors should check with the security guard at the front desk to find out where departments are located.