Our History: John Stack Sales Company is an experienced Manufacturers Representative Agency that has been serving the Heating, Plumbing & H.V.A.C. industry for over 60 years. Started by John Stack in 1958, our company began serving Pennsylvania Wholesale Distributors as a Marketing and Sales Representative for Hydronic Baseboard Radiation, Boilers, Warm Air Furnaces, Bath Enclosures and Accessories. Values and Approach: Based on our core values of Service, Support, Education and Technological Advancement, John Stack Sales Company is focused on all segments of the industry, striving to ensure mutually beneficial alliances with our partners. As a result of our commitment to excellence, we enjoy long lasting relationships with our manufacturing partners, having represented many of them for several decades. Who We Are: John Stack Sales Company is comprised of tenured staff and sales representatives with extensive product experience and industry knowledge. We are committed to the continued growth and advancement of the industry in New England and the Mid-Atlantic states.