Founded in 1961 as a family business in the Northwest Chicago area, Althoff Industries has never wavered in its commitment to offer the best and most complete service available in the heating and air conditioning industry. The company has expanded its base and grown dynamically in the intervening decades, but it retains the same focus and total dedication to customer satisfaction.

From residential heating and air conditioning, Althoff progressed into serving customer needs for plumbing, piping and electrical wiring services, and it was then a natural evolution to welcome small business and light industrial clients. Adding the Building Automation Group to the company lineup in the 1990s brought a new dimension of computerized HVAC control systems. Today, we number some of the largest and most innovative corporations and manufacturing firms in our area among our clients.