Windmill Mechanical has nearly 50 years of experience. Check out our services below and see the difference experience can make on quality. WINDMILL MECHANICALSERVICES VAV Boxes Specialty Diffusers Replacement Units Platforms Ornamental Metal Humidifiers Exhaust Fans Dampers Custom Railings Custom Duct Work Computer Room Cooling Coils Cell Dek Ionization Data Centres Tennant Renovations Supply Fans Praline Ceilings and Architectural Panels Project Management Apprenticeship Training Welding Services