MacDonald-Miller Facility Solutions provides repair and emergency service to all mechanical HVAC systems. MMFS' experience in design, installation, and commissioning of mechanical and environmental control systems provides a strong foundation to effectively service the most demanding building. Our Commercial, Industrial, and Institutional service activities support the smallest shopkeeper to clients with 5,000,000 square feet of occupied space. We are on-call 24 hours a day, ready to support the emergency service needs of any mechanical or plumbing system.