Johnstone Supply

Johnstone Supply operates as a heating equipment supplier in Madison, Wisconsin, serving the greater Dane County area including Fitchburg, Middleton, and Sun Prairie. The business maintains a perfect 5-star rating across 4 verified customer reviews, reflecting consistent service quality for residential and commercial HVAC projects. Located at their Madison store, the supplier operates Monday through Friday from 7 AM to 4:30 PM, providing equipment access to both homeowners and licensed contractors.

What distinguishes Johnstone Supply is their comprehensive equipment portfolio spanning residential unitary systems, mini-split configurations, and commercial packaged units. The company stocks major brands including gas furnaces, oil furnaces, air handlers, evaporator coils, and extended warranty options for home systems. Their mini-split offerings include variable capacity systems, single and multi-zone configurations, while commercial clients access single packaged and split system solutions with related installation accessories.

Customer feedback highlights Tim, a sales professional with over a decade of experience helping clients navigate equipment selection. Reviewers note his hands-on approach to matching specific heating needs with appropriate systems, whether for standard residential replacement or more complex manufactured housing applications. The single documented review emphasizes consistent support across multiple project types over a 10-year relationship.