Located on 309 N Lake St, Oelerich Heating Ventilating & Air Conditioning is in Mundelein. . Their services include Commercial Services, Cleaning Services, Sales, Estimates. Oelerich Heating Ventilating & Air Conditioning They have a single review on MojoPages.com, and it's a positive review. They can be reached by calling (847) 566-7900 . They have a number of products available which are Humidifiers, Heating and the brands for heaters consist of Lennox.