Johnstone Supply

Johnstone Supply operates as a heating equipment supplier in Halethorpe, Maryland, serving contractors and trades professionals with an inventory of residential and commercial HVAC components. The location holds a 3.6-star average rating drawn from 15 customer reviews, with most feedback highlighting the parts counter team as knowledgeable and efficient. Business hours run Monday through Friday from 7 AM to 4:30 PM, with Saturday and Sunday closed. The supplier maintains an Arbutus-area presence and serves the broader Anne Arundel County contractor market.

This supplier distinguishes itself through a contractor-only distribution model, specializing in equipment that professional installers require for residential and light commercial projects. The product catalog includes split systems, single-packaged units, mini-split configurations, and variable-capacity systems alongside furnace options spanning both gas and oil varieties. Extended warranties are available on select residential unitary equipment, and the store stocks field-installed accessories and multi-zone systems for more complex heating and cooling installations.

Customer accounts from reviewers describe specific positive interactions with staff members. One reviewer noted Zack anticipated their parts needs before they fully articulated the request, while another praised Carlos for confirming part availability and completing a transaction within ten minutes. Tim at the Arbutus location received multiple mentions for going above and beyond to assist with contractor-specific needs. Negative reviews consistently cite the supplier's trade-only policy as a barrier, with several customers expressing frustration at being directed to other sources for homeowner-appropriate purchases.