Commercial Technician, Manufacturing Technician, Assembly Technician, Production Technician, HVAC Manufacturing, ERV Systems, Indoor Air Quality, IAQ, Mechanical Assembly, Manufacturing Jobs Madison WI, Power Tools, Engineering Drawings, Quality Inspection, Lean Manufacturing, Renewable Energy, Sustainability Manufacturing, Skilled Trades. At RenewAire, our Commercial Technicians play a critical role in building high-quality energy recovery ventilation (ERV) systems that improve indoor air quality while reducing energy costs.