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6308 N. Milwaukee Ave. Chicago, IL 60646
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OEM
HVAC/R
Service First USA — Your Trusted OEM HVAC Parts Supplier!
From small replacement parts to full HVAC/R systems, Service First USA supports contractors and facility teams with reliable procurement, real OEM options, and nationwide fulfillment.
FAST AND RELIABLE real OEM PARTS
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Service First USA is a leading OEM HVAC/R parts supplier supporting contractors, facility managers, and commercial businesses across the U.S. We offer everything from replacement motors and capacitors to full system components — all backed by fast, nationwide fulfillment and real industry support
HVAC/R Industry News, OEM Product Releases & Contractor Specials
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NEWEST PRODUCTS AND PRO-TECH INSIGHTS!
Latest Posts
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FLRSF1235 Filter Replacement Guide – Genuine OEM Trane Air Filter
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Reversing ECM Motor Rotation: What Works, What Doesn’t, and What Can Burn Your Motor
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❄️ Technician Guide: How to Measure a Cooler Door Gasket for a Perfect Fit
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Why Preventive Maintenance Before Summer Can Save Your Business Thousands
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Why HVAC Prices Are on Fire (and What We’re Doing About It)
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Reduce Your Business's Carbon Footprint with Refrigerant Retrofitting
What Client’s Say
We have been purchasing all of our air filters quarterly from Service First, and they consistently deliver on time. The ordering process is smooth, and reliability has been excellent.
Mario J Louis
Fastenal Company
Service First has been helping us source parts for our older McQuay units. They’ve been very helpful and consistently come through with the correct parts. Their team is knowledgeable, and I highly recommend them..
Doug Jackson
Building Engineer - Goodman Theatre