Johnstone Supply

Commercial Verified

238 Riverside St, Portland, ME 04103, Portland, ME

4.4(14 reviews)

4.4(14 Google reviews)View on Google

RTUSplit SystemBoilerAHUHeat PumpCooling Tower

Quick Answers

What makes Johnstone Supply a strong choice for commercial HVAC in Portland, ME?

Johnstone Supply is a wholesale HVAC distributor in Portland, ME, backed by 22 locations spanning Maryland to Maine, giving facility managers access to both local expertise and national supply-chain strength. Customers consistently cite knowledgeable staff, responsive account representatives, and the ability to source hard-to-find parts — all critical for minimizing commercial building downtime.

What commercial HVAC services does Johnstone Supply provide in Portland?

Johnstone Supply in Portland, ME provides wholesale HVAC equipment and parts distribution, equipment sizing support, and technical support to commercial contractors and facility teams within a 25-mile service radius. The Portland location also offers training and events, quote requests, and online ordering tools to help facility managers and their contractors keep projects moving.

What commercial HVAC systems does Johnstone Supply service?

Johnstone Supply supports rooftop units (RTUs), split systems, boiler systems, air handling units, heat pumps, and cooling towers — covering the full range of mechanical systems found in commercial office buildings, retail spaces, industrial and warehouse facilities, multifamily properties, educational institutions, and hotels. Their staff provides technical support and equipment sizing guidance for each of these system types.

About

Johnstone Supply at 238 Riverside St in Portland, ME is a wholesale HVAC distributor serving commercial facility and property managers within a 25-mile radius, offering parts, equipment, and technical expertise for the full spectrum of commercial mechanical systems. The Portland location is part of a 22-store network running from Maryland to Maine, which means facility managers get the sourcing power of a regional distributor combined with staff who understand the specific demands of Maine's climate and commercial building stock. Whether a building houses rooftop units, boiler systems, or cooling towers, the Portland team can assist with equipment sizing and technical support before a contractor ever turns a wrench. Customers highlight the depth of product knowledge on staff and the willingness of the team to advocate directly with suppliers when contractors need a resolution on parts or equipment. Account representatives like Megan have earned specific praise for responsiveness and professionalism — qualities that matter when a school, hotel, or warehouse faces a system issue in the middle of a Maine winter. Johnstone Supply also provides structured resources for contractors serving commercial accounts, including an online eCatalog, model-to-part lookup tools, a Rooftop Selector, and training through Johnstone University. Facility managers who work with multiple contractors can direct their service partners to the Portland branch knowing consistent technical support is available. The location holds a 4.4/5 Google rating across customer reviews.

Frequently Asked Questions

What building types does Johnstone Supply's Portland location support?

The Portland location supports commercial HVAC needs across office buildings, retail spaces, industrial and warehouse facilities, multifamily properties, educational institutions, and hotels and hospitality properties. This range means facility managers overseeing diverse portfolios can source equipment and parts for multiple building types from a single distributor.

Does Johnstone Supply in Portland offer technical support for commercial HVAC systems?

Yes, the Portland location offers technical support and equipment sizing assistance, which customers specifically identify as a differentiator for commercial contractors and facility teams. Staff are noted for being knowledgeable and for advocating with suppliers on behalf of customers when product or resolution issues arise.

How far does Johnstone Supply's Portland, ME location deliver or serve?

The Portland branch serves customers within a 25-mile service radius of 238 Riverside St, Portland, ME 04103. Delivery is available, and customer reviews note that drivers are reliable and on-time even when a customer's site is difficult to locate.

Does Johnstone Supply offer training resources for contractors who service commercial buildings?

Johnstone Supply offers in-person and online training through its Training and Events program, including access to Johnstone University (JU Online) for self-paced learning. Facility managers who want their contracted HVAC technicians current on commercial system best practices can direct them to these resources.

Is there a loyalty or purchasing program available for commercial accounts at Johnstone Supply?

Johnstone Supply offers the Advantage Program, which allows account holders to earn points on purchases redeemable for merchandise, gift cards, and travel. Commercial facility teams and their contractors who regularly source parts and equipment through the Portland location can benefit from this ongoing incentive program.

Equipment & Systems

System Types Serviced

Rooftop Unit (RTU)Split SystemBoilerAir Handling Unit (AHU)Heat PumpCooling Tower

Building Types Served

Office Building

Retail / Shopping Center

Industrial / Warehouse

Multifamily (50+ units)

Education / Campus

Hospitality / Hotel

Operating Hours

Monday	7:00 AM – 4:30 PM
TuesdayToday	7:00 AM – 4:30 PM
Wednesday	7:00 AM – 4:30 PM
Thursday	7:00 AM – 4:30 PM
Friday	7:00 AM – 4:30 PM
Saturday	Closed
Sunday	Closed

License & Insurance

Insurance VerifiedNot verified

Location

238 Riverside St, Portland, ME 04103, USA

Request a Quote

Avg. response in 4 hours

Commercial Capabilities

24/7 AvailabilityNo

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Google Reviews

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11 months ago

Our Rep Megan is awesome, responsive, professional and patient. Super happy to have her on our team. Got a call from a delivery driver who initially had trouble finding us, he was great as well and even with the tricky location he was totally on time.

— Joel Dube

12 months ago

So excited that I found this company local not too far from where we live to find the one part we needed to complete our heat pump installation! All the guys in there are very professional, helpful, energetic, and friendly. Highly recommend! For all of your HVAC needs!

— Bobbi Green

11 months ago

Joe and the crew are super helpful. They are very knowledgeable and will advocate for you with their suppliers when needed. Highly recommend.

— Doug Quist