McCrea University Homeowner Tips McCrea Heating & Air careersHVACtraining Sep 22 2015 McCrea now has a new state of the art training facility in Warrenton VA. McCrea University will be used for seminars, meetings, and training classes. Inside the space is a functioning unit with zoning as well as indoor air quality products that can be used for technical training purposes. Here employees and students can not only get book training, they can get their hands on it and get field training in the classroom. Training and educating our employees is our top priority. Do you want to get in the HVAC field? Great careers await at McCrea. Get started at McCrea University.