Dampers & Controls

Surplus City Liquidators sources surplus HVAC dampers directly from manufacturers as overstock HVAC dampers, which are brand-new, never-installed products that came to market because a manufacturer overproduced a model run or discontinued a product line. "Surplus" describes how the inventory was acquired, not the condition of the equipment. These are the same discount HVAC parts you'd find through a traditional distributor, arriving in original manufacturer packaging where available, at a significantly lower price point.

Surplus City carries a rotating selection of HVAC zone dampers and HVAC damper controls across multiple configurations, including round and rectangular zone dampers, motorized dampers, fresh air dampers, fire dampers, and pneumatic damper actuators. Products span residential and commercial voltage ratings (24 VAC is most common) and include both normally open and normally closed actuator configurations. Because inventory reflects manufacturer overstock availability, specific models and duct sizes vary; check the Dampers & Controls collection for current listings.

Yes. Every damper and control in Surplus City's inventory is brand-new and never installed, manufactured to the same standards as retail-priced alternatives. Fresh air dampers, fire dampers, and smoke dampers listed on the site are designed to meet applicable fire-resistance and building code ratings. Check the individual listing's specifications for your application. Because the inventory is manufacturer overstock, not refurbished or returned stock, build quality is identical to the same product purchased through a traditional supply house.

Start with duct geometry: round dampers for round duct runs, rectangular zone dampers for rectangular branch runs. For any motorized HVAC damper, confirm actuator voltage (24 VAC covers most residential and light commercial applications), blade count, and whether the damper should fail open or fail closed for your zone layout. Verify duct diameter or opening dimensions against the product listing before ordering; each listing includes full specifications, and Surplus City's team is available by phone to help verify compatibility.

Confirm three things before placing the order: duct diameter or opening dimensions, actuator voltage, and whether the damper should fail open or fail closed for your application. Review any packaging condition notes on the listing, particularly if the item ships without original manufacturer packaging, and note the listed manufacture date if available. For pneumatic actuator models, verify the spring range and maximum safe pressure against your system's specifications before ordering.

Surplus City ships to all 48 contiguous states using ground, LTL freight, flatbed, and ship-to-terminal options; the right method depends on the size and weight of the order. Shipping charges for larger or freight-class items are based on dimensional weight, actual weight, and carrier fuel surcharges, so exact costs are confirmed after the order is placed. Surplus City's shipping team is available at 765-482-7000 to answer logistics questions and provide custom quotes.

Local pickup is available at all five Surplus City showrooms. The Lebanon, IN, and Lafayette, IN, locations are open Monday through Friday, 7:30 a.m. to 4:00 p.m. EST. The Grand Prairie, TX, Greenville, SC, and Lebanon, PA, locations are open Monday through Friday, 7:30 a.m. to 4:30 p.m. CST/EST. Check the product listing for real-time availability at your preferred location before making the trip, as inventory varies by site.

Surplus City's optional $30/30-day startup warranty applies to eligible major equipment categories (AC and heat pump units, air handlers, evaporator coils, and furnaces). HVAC dampers and controls are components/parts and fall outside those categories under the current warranty terms. Manufacturer warranty documentation, if any, depends on the specific product and brand; check individual listings for details.