In 1955, Jane Miller began her career with Rockel Sheet Metal. At that time, there were only two other LENNOX dealers in the entire St. Louis area. Five years later, Jane along with associates Al Kuennen and Don Herkenhoff acquired the heating and air conditioning department of Rockel, including the LENNOX dealership. The three of them formed AL-DON Service Inc.
AL-DON immediately set out to become an industry leader, establishing the first Maintenance Agreements in the St. Louis area for HVAC systems. With four annual service dates, AL-Don's Customers were able to breathe easier knowing a competent organization was taking care of their homes and businesses. The business grew quickly during its early years, largely due to the strong reputation that followed them from customer to customer.
In 1967, Don Herkenhoff decided to pursue other interest outside of HVAC. This left only two principals, Jane Miller and Al Kuennen, who became sole and equal partners in the business. In 1972 AL-DON moved to Creve Coeur which is were they are currently located.
In 1977, Jane Miller assumed sole proprietorship of AL-DON Service, Inc. In the following years, the company continued to prosper under her leadership and business savvy, developing strategic alliances with manufacturers and distributors that enabled them to offer services unique to the area. A "Customized" Maintenance Program was introduced that offered a high degree of flexibility in selecting services.
In 1997, AL-DON began offering the computerized diagnostic testing unit called the Infiltrometer (Blower Door). This system allowed customers to view, first-hand, the efficiency level of their Indoor Air System. AL-DON pioneered this technology in the St. Louis area. AL-DON also introduced the HEPA-AIRE 99.97% filtration efficiency Central Air Purification System. Again, AL-DON was trail blazing; being the first dealer in the entire state.