Nielsen Mechanical Contractors, Inc. is the leader in Colorado Springs, CO, in the installation of HVAC systems for commercial businesses. Whether you need an HVAC system for new commercial construction or tenant improvements and remodeling, or you want to design a system for your specific needs, we can get the job done. Nielsen Mechanical Contractors, Inc. is locally owned and operated. Combined, our team of experts boasts over 50 years of experience and is highly trained in providing quality service and professional installation.