Milwaukee's Trusted HVAC Supply Partner for 86+ Years
Industrial-grade heating and cooling supplies for contractors and businesses across Wisconsin. Expert support, extensive inventory, same-day fulfillment.
Your HVAC Supply Partner, Not Just a Vendor
We understand the challenges contractors face. That's why we've built our business around solving them.
Need reliable HVAC supplies fast?
86+ years of curated, in-stock inventory ready for same-day pickup or delivery.
Looking for commercial-grade equipment?
Authorized distributor for industry-leading brands with 10,000+ products available.
Want expert technical support?
Knowledgeable staff who understand your projects and recommend the right products.
Everything You Need, All Under One Roof
From furnaces to filters, we stock 10,000+ products from industry-leading brands.
Heating Systems & Furnaces
Commercial and residential furnaces, heat pumps, and hydronic heating equipment from top manufacturers.
Learn MoreAir Conditioning Units
Central air systems, split units, and commercial HVAC solutions for every building type and budget.
Learn MoreVentilation & Ductwork
Complete duct systems, ventilation equipment, grilles, registers, and dampers for proper airflow.
Learn MoreBoilers & Radiators
High-efficiency boilers, radiators, and radiant heating components for commercial and residential use.
Learn MoreControls & Thermostats
Smart thermostats, building automation controls, sensors, and programmable HVAC control systems.
Learn MoreParts & Accessories
Filters, belts, motors, capacitors, refrigerant, and thousands of replacement parts always in stock.
Learn MoreYears in Business
Products in Stock
Contractors Served
Delivery Available
Trusted by Wisconsin's Best Contractors
“Auer Steel has been our go-to supplier for 15 years. Their inventory is always stocked, and the technical team knows their products inside and out. Same-day pickup has saved our jobs more times than I can count.”
James K.
HVAC Contractor, Milwaukee
From Quote to Delivery in 4 Simple Steps
Contact Us
Call, email, or visit our showroom in Milwaukee. Our team is ready to help with your HVAC supply needs.
Expert Consultation
We recommend the right products for your project based on building type, capacity, and budget requirements.
Fast Fulfillment
Pickup from our warehouse same-day or schedule delivery within 24 hours across the Milwaukee area.
Ongoing Support
Technical assistance, warranty support, and product expertise whenever you need it, for the life of your equipment.
Frequently Asked Questions
Ready to Equip Your Next HVAC Project?
Contact our team for expert product recommendations and fast fulfillment.
Same-day pickup available for in-stock items