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Claim This BusinessJohnstone Supply is a heating equipment supplier operating in Hammond, Indiana, with a 4.1-star rating compiled from 25 customer reviews. The store is open Monday through Friday from 7 AM to 4:30 PM, with Saturday hours extending to noon. While the business has not disclosed its founding year or license number publicly, it maintains an active presence in the local market serving Hammond and surrounding communities in Lake County. The supplier operates as a distributor offering a range of HVAC equipment categories, including residential and commercial split systems, mini-split systems, gas and oil furnaces, air handlers, and evaporator coils. Customers in the region seeking heating and cooling components should verify whether they meet the contractor-focused purchasing requirements before visiting.
What distinguishes Johnstone Supply is its breadth of equipment selection from major manufacturers. The website lists dozens of HVAC categories spanning single-packaged units, multi-zone systems, variable capacity systems, and field-installed accessories. Unlike typical retail contractors, the store maintains a counter staffed by technicians who can provide technical guidance on installations and compatibility questions. They also stock extended warranties and specialty items for manufactured housing applications. However, the store does not appear to offer installation services directly and operates primarily as a supplier to licensed contractors and possibly commercial clients. There is no publicized rebate program or workmanship guarantee mentioned on their site, and while they carry a wide selection, the customer reviews suggest pricing may be higher than competing suppliers.
Looking at customer experiences, Jessica Stark called out Jeff by name for providing very professional and friendly assistance in getting everything needed for a project. Stieme Styles described receiving quick service both in person and over the phone, with items consistently in stock. The negative reviews point to communication issues, with Eric b experiencing repeated hold times exceeding 40 minutes over a 48-minute call and noting an unprofessional approach. Gloria Sierra specifically noted the store operates as wholesale only and should be clearer about not serving typical retail customers. James Woods criticized both pricing and a points system as unfavorable. These mixed experiences suggest the store works well for informed contractors who know exactly what they need but may frustrate customers seeking retail support.
Mixed sentiment emerges from the 25 reviews: 5 reviewers gave 5-star ratings and specifically praised the knowledgeable counter staff, while 3 reviewers cited unprofessional service including excessive hold times and dismissive interactions. Positive reviews mention quick service and consistent stock availability, and negative feedback centers on pricing being too high and unclear wholesale policies.
| Sunday | Closed |
| Monday | 7 AM–4:30 PM |
| Tuesday | 7 AM–4:30 PM |
| Wednesday | 7 AM–4:30 PM |
| ThursdayToday | 7 AM–4:30 PM |
| Friday | 7 AM–4:30 PM |
| Saturday | 8 AM–12 PM |
Full line of residential split system equipment including condensing units and matching components for home heating and cooling.
Single zone and multi-zone mini-split systems suitable for room additions, retrofits, and spaces without ductwork.
Gas furnaces and oil furnaces for residential heating applications, with various efficiency ratings available.
Air handlers and evaporator coils for installation with heat pump or AC systems, including matching compatibility options.
Self-contained packaged heating and cooling units combining all components in a single cabinet for simplified installation.
Commercial-grade HVAC systems designed for larger residential applications and light commercial buildings.
Extended warranty options available for purchase with new equipment to provide added protection beyond standard coverage.
Installation accessories and components for professional contractors completing system installations and upgrades.