Economizer Packages and Accessories

Surplus HVAC economizers sold by Surplus City Liquidators are brand-new, never-installed units sourced directly from top manufacturers in large quantities. The inventory is manufacturer overstock: excess production that was never put into service, not damaged or refurbished goods.

Surplus City buys in bulk directly from HVAC manufacturers, which eliminates the middlemen that typically drive up pricing at traditional distributors. That purchasing model, combined with lean overhead across our warehouse locations, is what allows us to pass meaningful savings on to contractors and facilities managers without sacrificing product quality or brand selection.

The result: you get OEM-spec commercial HVAC economizer packages from the same brands you already spec, at prices your regular distributor can't match.

Every discount HVAC economizer package and accessory in our inventory is brand-new and has never been installed. "Surplus" is a purchasing term, also called “overstock,” not a condition descriptor. It refers to excess manufacturer inventory that never reached end use.

Most items in our economizer inventory are not refurbished, scratch-and-dent, cosmetically damaged, or previously installed. However, if they are, we note it. Many units arrive from manufacturers in original packaging with full OEM specifications intact.

Surplus City carries a range of commercial HVAC economizer packages for rooftop package units, including horizontal and vertical airflow configurations. Economizer types in stock include:

• Fixed dry bulb economizers: These use outdoor air temperature as the sole changeover control.
• Single enthalpy economizer packages, which measure both temperature and humidity at the outdoor sensor for more precise free-cooling control.
• Economizer accessory kits for retrofits and replacements on existing rooftop units.
  

Depending on the model, packages are supplied with factory-integrated components including Honeywell electromechanical controls, actuators, temperature and enthalpy sensors, rain hoods, barometric relief dampers, and aluminum filtration. Stock moves quickly: head over to our site to see current pricing and live availability before you order.

Compatibility depends on your RTU's manufacturer, model number, and airflow orientation: horizontal and vertical configurations are not interchangeable, so you'll want to confirm both before ordering.

If you're not sure which economizer fits your unit, call our specialist team at (765) 482-7000. They can cross-reference your model number and walk you through the right option before you buy. A five-minute call is faster than a return shipment.

An economizer uses outdoor air for cooling when conditions are favorable, based on either temperature alone (dry bulb) or a combination of temperature and humidity (enthalpy), which helps reduce compressor run time. That process is called free cooling, and it directly cuts energy costs during mild weather.

Beyond energy savings, economizers reduce wear on compressors and refrigerant components by shifting load to the outdoor air intake. They also improve indoor air quality by introducing fresh outside air rather than recirculating conditioned return air.

Economizers are standard on most commercial rooftop package units and are code-required for new commercial HVAC installations in many jurisdictions. If you're replacing a failed unit on an existing RTU, matching the original economizer type, whether dry bulb economizer or enthalpy economizer, is the fastest path to a compliant reinstall.

In addition to full HVAC economizer packages, Surplus City stocks individual replacement components including dampers, actuators, sensors, and rooftop accessories. Having these on hand reduces job-site downtime when a single component fails on an otherwise functioning unit, because you don't have to pull and replace the entire economizer assembly.

For economizer accessories beyond what's listed in this collection, browse the Dampers & Controls and Rooftop Accessories categories on the site. Inventory across all categories is updated as new stock arrives from manufacturers.

Surplus City ships to all 50 states. Freight options include standard ground, LTL (less-than-truckload), flatbed, ship-to-terminal, and full truckload for larger orders. Orders are processed within 3 to 5 business days.

For oversized or multi-unit freight, our specialist team can build a custom shipping quote. Call (765) 482-7000. If you prefer to inspect equipment before it leaves the dock, in-person pickup is available at our warehouse locations in Lebanon, IN, Lafayette, IN, Grand Prairie, TX, Greenville, SC, and Lebanon, PA.