Johnstone Supply

Johnstone Supply operates as a heating equipment supplier in Boise, Idaho, serving contractors and trades professionals rather than retail customers. The branch holds a 3.7-star rating drawn from 21 customer reviews, with operating hours Monday through Friday from 8 AM to 5 PM. As part of a regional supplier network, the Boise location provides HVAC equipment and replacement parts to licensed heating and cooling contractors throughout the Treasure Valley area.

This supplier distinguishes itself through an extensive inventory spanning multiple HVAC categories. The product lineup includes commercial packaged units, residential split systems, mini-split systems with field-installed accessories, and specialty equipment such as geothermal units, evaporative coolers, and portable air conditioners. Their parts department carries OEM components including compressors, motors, coils, electrical components, and refrigeration equipment, essentially everything a licensed contractor needs to complete installations and repairs. The contractor-only business model means they stock professional-grade items not typically available at retail outlets.

Customer reviews highlight specific technicians who provided notable service. Mike, referenced in a 5-star review, guided a customer through air conditioner diagnostic symptoms during triple-digit Boise heat, preventing multiple service trips and incorrect part purchases, the customer had the unit running within hours. Thomas Bullock described the team as quick, reliable, and particularly skilled at sourcing unusual items. However, one reviewer noted the supplier declined selling even basic parts like o-rings to non-contractors, reflecting their trade-only policy.

Natalie Morgan's review stands out for a different reason, she described Johnstone as helping with a water heater issue at a significantly lower cost than a competing plumber's quote.