About Us

Serving The St.Louis Area For More than 65 Years


In 1955, Jane Miller began her career with Rockel Sheet Metal. At that time, only two other LENNOX dealers were in the entire St. Louis area. Years later, Jane, along with A Kuennen and Don Herkenhof, 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 it from customer to customer.

In 1964, Don Herkenhof decided to pursue other interests outside of HVAC. This left only two principals, Jane Miller and Al Kuennen, who became sole and equal partners in the business. In 1969, AL-DON moved to Creve Coeur and is still located there. In 1979, 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 a computerized diagnostic testing unit called the Infltrometer (Blower Door). This system allowed customers to see firsthand 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 percent efficiency Central Air Purification System. Again, AL-DON was trailblazing, being the first dealer in the entire state.

AL-DON grew considerably under Jane Miller’s watchful eye, and it will continue to grow under her son, Jeff Miller. Jeff began working for AL-DON in the late 70s, and through hard work and mentorships, Jeff worked his way into a management position.

Jeff purchased AL-DON in January 2009 and renamed the company AL-DON “Indoor Air Quality Specialists” LLC. His wife, Toi, joined him in June 2009. The company’s newest objective is to redirect its efforts from selling HVAC equipment and services to being a leader in “Whole-House Indoor Air Quality.” Jeff  strongly believes in educating current and potential customers on the benefits of indoor air quality and keeping customers happy and healthy. Jeff’s vision for his company is that AL-DON “Indoor Air Quality Specialists” LC, becomes a “one-stop” solution for all your indoor air quality health issues, comfort, and environmental needs.

Call AL-DON “Indoor Air Quality Specialists” LLC, today to schedule an appointment.

jane
HANDERSON MG 1653 2
aboutus
Supporting Local Pros

AL-DON proudly supports local professionals, providing reliable services and contributing to the community.

Quality Work Guaranteed

AL-DON guarantees top-quality workmanship that exceeds expectations.

Affordable Financing

AL-DON offers affordable financing options, making quality services accessible and budget-friendly for everyone

Why Us

We Pride Ourselves in the Quality of Our Work

Our Technician are experts

Under Jane Miller’s attentive leadership, AL-DON experienced significant growth, and now her son, Jeff Miller, is poised to continue that success. Jeff joined AL-DON in the late 70s and, through dedication and valuable mentorships, climbed the ranks to a management position.

In January 2009, Jeff took over the company and rebranded it as AL-DON Indoor Air Quality Specialists LLC. Joining him in June 2009 was his wife, Toi. Their shared objective is to shift the company’s focus from selling HVAC equipment and services to becoming a trailblazer in Whole-House Indoor Air Quality. Jeff strongly believes in educating customers about the advantages of indoor air quality, ensuring their happiness and well-being.

Jeff envisions AL-DON Indoor Air Quality Specialists LLC as a comprehensive solution for all indoor air quality, comfort, and environmental concerns—a true “one-stop” destination. Contact AL-DON Indoor Air Quality Specialists LLC today to schedule an appointment and take the first step towards a healthier and more comfortable living environment.

Y8SZCSN 1 min
about Al-don

We are TOP HVAC Service Company

30 Years of Experience

In 1955, Jane Miller joined Rockel Sheet Metal, one of only three LENNOX dealers in St. Louis. Seven years later, Jane, along with Al Kuennen and Don Herkenhoff, acquired the heating and air conditioning department, forming AL-DON Service, Inc. They quickly became industry leaders, introducing maintenance agreements for HVAC systems. AL-DON’s strong reputation fueled rapid growth.

In 1972, they moved to Creve Coeur, where they are still located. Jane Miller assumed sole proprietorship in 1979, guiding the company’s success by forming strategic alliances and offering customized maintenance programs. They introduced innovative technologies like the Infiltrometer and HEPA-AIRE Central Air Purification System, pioneering their use in St. Louis.

9ZLHMAR min
CDBEEGM min
about al-don

Trusted by 10,000+ Home Owners

Serving For More than 65 Years

For the past 65 years, AL-DON has been the epitome of a trusted company. We have a legacy to uphold and we do that with unwavering commitment to excellence. Customers rely on our expertise, professionalism, and integrity. AL-DON’s skilled technicians deliver exceptional service, ensuring satisfaction every time. Our longevity in the industry speaks volumes about reliability and dedication. Experience the peace of mind that comes with choosing AL-DON, a trusted name for three decades.

Supporting Local Pros

AL-DON proudly supports local professionals, providing reliable services and contributing to the community.

Quality Work Guaranteed

AL-DON guarantees top-quality workmanship that exceeds expectations.

Affordable Financing

AL-DON offers affordable financing options, making quality services accessible and budget-friendly for everyone

Why Us

We Pride Ourselves in the Quality of Our Work

Our Technician are experts

Under Jane Miller’s attentive leadership, AL-DON experienced significant growth, and now her son, Jeff Miller, is poised to continue that success. Jeff joined AL-DON in the late 70s and, through dedication and valuable mentorships, climbed the ranks to a management position.

In January 2009, Jeff took over the company and rebranded it as AL-DON Indoor Air Quality Specialists LLC. Joining him in June 2009 was his wife, Toi. Their shared objective is to shift the company’s focus from selling HVAC equipment and services to becoming a trailblazer in Whole-House Indoor Air Quality. Jeff strongly believes in educating customers about the advantages of indoor air quality, ensuring their happiness and well-being.

Jeff envisions AL-DON Indoor Air Quality Specialists LLC as a comprehensive solution for all indoor air quality, comfort, and environmental concerns—a true “one-stop” destination. Contact AL-DON Indoor Air Quality Specialists LLC today to schedule an appointment and take the first step towards a healthier and more comfortable living environment.

Y8SZCSN 1 min

Having HVAC Problems? Call For Repair On Replacement Today!

Get A FREE Quote from Al-Don!