40 Custom fabrication and custom manufacture of HVAC, plumbing, electrical, building automation systems, and industrial controls;
37 Installation, maintenance and repair of HVAC systems, plumbing, electrical, building automation systems, and industrial controls
35 Consultation in the field of energy efficiency, namely, improvement of energy performance at facilities and sustainable reduction of utility costs and carbon emissions;
42 Engineering and design services in the fields of HVAC, plumbing, electrical, building automation systems, and industrial controls