Serving your HVAC needs for over 70 years.

We are HVAC manufacturer representatives covering the Midwest and headquartered in Chicago.  Since 1948 our sales team has provided technical, application and sales support for our clients and customers.  We represent the leading brands in our industry. These brand names represent quality, value and innovation.  We help people condition the building environment for where they work, live, and play by representing products that provide healthier air, while consuming less energy and increasing comfort.

Our purpose is simple, Better Living Indoors.

This means improving the quality and comfort level of your environment by making the air safe to breath and the air and water temperature consistent and reliable.

We work with distributors, contractors, engineers, and building owners providing them with 70 years of experience, and expertise, along with application and technical support. Our relationships are created and strengthened by providing fast, consistent, and reliable information.


Think Globally, Market Locally

Timely delivery of product information to our alliance of distributors, contractors, and engineers is essential. We represent manufacturers from around the world, bringing you the latest advances in the HVAC industry.


Strategically serving our clients and customers over 70 years with proven short and long term results,  we continue to be leaders in the industry.  A to Z Sales constantly strives to exceed the expectations of our clientele.

Our products are sold through distributors, specification representatives and original equipment manufacturers.  We increase sales velocity by supporting contractors, engineers, architects and builders with their HVAC needs.  Our professional sales engineers introduce new products, assist with your designs, provide training and in-store merchandising.

We have received numerous sales achievement awards from our manufacturer clients for helping them achieve their goals.  We value the relationship with every person we meet.

Family and business are tied together.  Grow together.

Jim Graham started buying into the business in the early 80’s but worked like an owner since his first day in 1970, till his last day as President in 1997.  Starting as an employee, working his way up to Vice President in 1981 and becoming President and owner in 1990, Jim was able to grow A to Z Sales and provided his sons an opportunity to continue his success when they purchased it in 1997 when Parkinson’s disease caused Jim to retire sooner rather than later.
Proud of their business and family, of the opportunities provided to them and ones they created for many others; this family business knows that hard work and dedication builds relationships and inspires all of us to work harder for Better Living Indoors