Building Maintenance Supplies AmSan has introduced a complete MRO Building Maintenance Supplies product offering: appliances, electrical maintenance, lighting fixtures, bulbs and fluorescent lamps, HVAC units and maintenance items, plumbing fixtures, plumbing repair and maintenance items, bath accessories, hardware, tools, access control, and door hardware. Streamlining and simplifying your ordering processes by offering both Janitorial and MRO products is another step in our process to decrease your operating expense and improve your bottom line. With just a single purchase order, AmSan can fulfill all your facility maintenance needs.