Trane Washable Economizer Filters — Compatible Aluminum Mesh Replacements

Trane Washable Filter — Shop by OEM Part Number

Product Overview — What Are Trane Economizer Pre-Filters?

Trane economizers are outside air (OA) intake modules integrated into commercial rooftop units. They allow the HVAC system to draw in cool outdoor air during mild weather, reducing mechanical cooling load and cutting energy costs during shoulder seasons — a process called free cooling or economizer mode. The pre-filter, an aluminum mesh screen mounted directly in the intake louver or filter track, is the first and only filtration layer between the outdoor environment and the unit’s interior components. It captures large and medium-size particles — pollen, cottonwood seed, insects, leaves, and coarse dust — before they reach the coil, the downstream pleated filters, or the economizer damper blade.

Unlike the disposable filters installed downstream, the economizer pre-filter is designed to be a permanent component. It is a structural and filtration element simultaneously. Trane’s OEM specification calls for corrugated aluminum mesh media that captures particulate while maintaining a low resistance to airflow across the face. Low pressure drop is critical in high-airflow rooftop applications because any restriction directly increases fan motor load and reduces the volume of supply air delivered to the building below.

Our replacement filters use the same multi-ply corrugated aluminum media construction as the OEM specification. The media is formed from aluminum alloy corrugated sheet stock, stacked in 5 plies (1″ depth) or 7 plies (2″ depth), and bonded between two rigid aluminum face grids. Those grids keep the media tightly packed throughout the service life and prevent deformation at high face velocities — a common failure mode in lower-quality aftermarket alternatives fabricated with looser tolerances. The outer frame is .030” nominal wall aluminum alloy, mitered and pop-riveted at the corners to maintain dimensional accuracy to ±1/16” and resist the corrosive outdoor environment of a rooftop installation.

Trane economizer filters are available in two standard depth configurations. The 1” depth covers the vast majority of Trane RTU applications and represents the entire AG0320101 through AG0320104 series and most FLR-prefix sizes. The 2” depth — represented in our catalog by the AG0320204 replacement (20×25×2) — provides doubled media capacity and extended cleaning intervals for applications with higher dust loading. Both configurations use identical media alloy and frame materials; only the number of media plies and dust-holding capacity differ.

Technical Specifications

All Trane-compatible aluminum mesh filters manufactured by Metal Air Filters conform to the following specifications. Values apply to both 1” and 2” depth configurations unless noted.

Trane OEM Part Number Reference — All Compatible Filters

When ordering a Trane economizer replacement filter, the most reliable method is matching the OEM part number printed on the steel frame label of the existing filter, or found in the rooftop unit’s maintenance documentation. Trane uses two primary part number families: the AG0320xxx series covers standard 1” and 2” depth filters for the majority of mid-range RTUs; the FLR-prefix series covers additional standard sizes and non-standard exact-dimension configurations for larger-tonnage and specialized installations. The table below maps each Trane OEM part number to our direct replacement, confirming the filter face size and our catalog SKU.

Not seeing your part number? We manufacture custom-cut filters to exact dimensions — browse our custom filter options or contact us with your filter’s face measurements and depth and we will fabricate to specification.

Compatible Trane Rooftop Unit Models

The AG0320xxx and FLR-prefix filters appear across a broad range of Trane and American Standard commercial RTU product families spanning more than three decades of production. Understanding which model series uses which filter allows facility managers, HVAC contractors, and property management companies to pre-order the correct replacement without needing the original filter physically on hand. The mapping below covers the most common model lines; custom-specified or engineered-to-order units may use a different size, in which case the part number stamped or labeled on the existing filter frame remains the most reliable reference.

Trane standardized economizer filter dimensions across the AG0320xxx family to reduce the number of SKUs required for a full-building maintenance program. A facility with a mixed install of 3-ton and 5-ton Precedent units may find that a single filter size covers every unit on the roof. Confirming this by checking each unit’s access panel label — which typically lists the required filter size or part number — takes minutes and significantly simplifies bulk ordering and inventory management.

Note on American Standard compatibility: Trane and American Standard are sister brands within the same parent company. Their commercial rooftop units share engineering platforms, which is why the AG0320xxx filters specified for American Standard Precedent and Voyager units are dimensionally identical to their Trane-branded equivalents. If your unit bears the American Standard nameplate and specifies an AG0320xxx or FLR-prefix filter, our replacement is the correct direct fit.

About Trane — A Legacy of Commercial HVAC Excellence

Trane’s story begins in 1913 in La Crosse, Wisconsin, where James Trane, a Norwegian immigrant and master plumber, founded the Trane Company to manufacture low-pressure steam heating systems for residential and light commercial buildings. His son Reuben Trane joined the company in the 1920s and directed its focus toward what would become the defining Trane innovation: the Turbovac centrifugal refrigeration machine, introduced in 1931. The Turbovac was the first practical large-scale water chiller designed specifically for commercial building air conditioning, establishing Trane as a leader in commercial climate control decades before central air became a standard building expectation in the postwar era.

Through the mid-20th century, Trane expanded its product line to include packaged rooftop units suited to the commercial construction boom that followed World War II. Strip malls, office parks, retail centers, schools, and light industrial buildings created enormous demand for self-contained, rooftop-mounted HVAC systems that could be serviced without penetrating the conditioned space. Trane’s RTU product line became the dominant solution for this market. The economizer section was added to most commercial RTUs beginning in the 1970s, as state and federal energy codes began mandating outside air ventilation and free cooling capability. The economizer pre-filter track — standardized across Trane RTU families to simplify field replacement — introduced the dimensional specifications that the AG0320xxx filter family still serves today, four decades later.

Trane was acquired by American Standard Companies in 1984, merging two major HVAC brands under a single corporate parent without eliminating either brand identity. The merger is the reason American Standard commercial RTUs — particularly the Precedent and Voyager series — use filter specifications identical to their Trane counterparts. When you order an AG0320xxx replacement filter from Metal Air Filters, it fits both brands equally because both brands were engineered from the same platform during the same era.

In 2007, Ingersoll Rand acquired the Trane and American Standard HVAC businesses for $10.1 billion, adding the combined climate solutions operation to an industrial portfolio that included Thermo King transport refrigeration and Club Car utility vehicles. Under Ingersoll Rand’s ownership, Trane expanded into building automation, variable refrigerant flow (VRF) systems, and connected building technologies, while the core commercial RTU line continued to deliver the same standardized economizer filter dimensions that maintenance technicians had relied on for decades — a testament to the quality of the original dimensional engineering.

The most recent chapter began in 2020, when Ingersoll Rand completed the separation of its climate businesses into a standalone public company, Trane Technologies, which trades on the New York Stock Exchange under the ticker TT. The Ingersoll Rand industrial businesses were simultaneously merged with Gardner Denver to form a separate entity retaining the Ingersoll Rand name. The separation returned Trane to its roots as a focused climate solutions company. Today, Trane Technologies operates manufacturing facilities across North America, Europe, and Asia, serving commercial building owners, HVAC contractors, and facility managers across every market where Trane equipment has been installed over the past century. The AG0320xxx and FLR-prefix economizer filter part numbers in our catalog correspond to units ranging from 2 to 25 or more years of age — a reflection of Trane’s long commercial installation base and the importance of proper filter maintenance throughout a unit’s full service life.

Trane’s product portfolio extends well beyond the packaged rooftop units that serve the light-to-mid commercial building market. For central-plant large-tonnage cooling, Trane manufactures the CenTraVac centrifugal chiller — one of the most widely specified water chillers in the industry, available from 200 to over 5,000 tons — and the Series R helical rotary chiller for mid-size chilled water plants from 20 to 500 tons. The Precedent WSC / WCC / TSC / TCC (3–10 ton) and Voyager TC / TD (12.5–25 ton) packaged RTU lines are the highest-volume commercial segment products. The Voyager Commercial YCD / TCD (27.5–50 ton) and Intellipak I and II (25–130 ton) extend the packaged product line into large commercial and institutional applications. Trane’s Tracer building automation system provides controls integration across the full equipment portfolio, and the ComfortLink II platform connects commercial RTU monitoring to cloud-based building management. IntelliCoat corrosion-protection and Spine Fin coil technologies appear across Voyager and Precedent product lines. On the residential and light-commercial side, Trane markets the XV and XR series split-system heat pumps and air conditioners, as well as the S series gas furnaces. American Standard — Trane’s sister brand within Trane Technologies — applies identical platform engineering to its Precedent and Voyager RTU lines, which is why AG0320xxx and FLR-prefix filters serve both nameplates equally.

Installation Instructions

Installing a replacement Trane economizer pre-filter is a routine maintenance task that does not require specialized tools or HVAC certifications. Total installation time is typically 10 to 15 minutes per unit, including access panel removal and filter track inspection. The steps below apply to the majority of Trane and American Standard commercial RTUs equipped with single-piece filter track economizer sections.

Before You Begin

• Confirm the replacement filter dimensions match the existing filter, or verify the OEM part number against the reference table above.
• Follow all jobsite safety protocols for rooftop access, including fall protection appropriate to roof type and parapet height.
• Power down the unit at the main disconnect switch or set the thermostat to off before opening the access panel.
• Have a clean cloth or soft brush available for track cleaning.

Step-by-Step Filter Replacement

1. Access the economizer section by opening the outside air intake access panel. On most Trane Precedent and Voyager units this panel is on the front face of the unit (the side facing prevailing wind) and is secured with two ¼-turn Dzus fasteners. A flat-blade screwdriver or Dzus tool is required. Some units use Phillips or hex-head screws instead.
2. Remove the existing filter by gripping the filter frame on both sides and pulling straight out of the filter track. On units equipped with retaining wire clips or a hold-down bar, release those fasteners before pulling. Do not force the filter; if resistance is felt, check for additional fasteners or obstructions.
3. Inspect and clean the filter track. Use a brush or cloth to clear accumulated debris from the four track walls. Inspect for bent sections, corrosion, or gaps that would allow air to bypass the filter face. Any significant track deformation should be corrected before installing the new filter to ensure a bypass-free seal.
4. Slide the new filter into the track with the corrugated media face oriented toward incoming airflow — corrugation rows face the outside of the unit, the flatter face toward the interior. On units with a directional filter track slot, the filter will seat correctly in only one orientation.
5. Confirm full seating. The filter frame should sit flush with the four track walls on all sides. Any gap creates an unfiltered air bypass that defeats the purpose of the pre-filter entirely.
6. Re-engage all retaining fasteners. Replace hold-down bars, retaining clips, or securing screws as applicable. Close and secure the access panel.
7. Restore power and verify normal operation. With the unit back online, confirm that the economizer damper cycles normally. An improperly seated filter with excessive frame interference can restrict damper travel in units where the filter track and damper assembly are closely toleranced.

Model-Specific Access Notes

• Precedent WSC / WCC / TSC / TCC (3–10 ton): OA access panel is typically on the front face of the unit, secured with two ¼-turn Dzus fasteners. The filter slides into a horizontal track immediately inside the panel opening. These units are relatively compact and the filter frame is lightweight — a single-person job in standard conditions. Common filters: AG0320101 (16×20), AG0320102 (16×25), AG0320103 (20×20), AG0320104 (20×25).
• Voyager TC / TD (12.5–25 ton): Same Dzus panel design as the Precedent series. Larger unit sizes in this range may use a hold-down retaining wire clipped across the filter track — unhook the clip before pulling the filter. Many Voyager units use a 20×25 filter (AG0320104 or FLR00537); the 2” depth AG0320204 is used in higher-dust-loading configurations with extended service intervals.
• Voyager Commercial YCD / TCD (27.5–50 ton): These larger-tonnage units have taller economizer sections and heavier access panels. The FLR09410 (23.75×38×1) filter is a non-standard exact-dimension size and is substantially larger and heavier than the standard panel filters used in smaller Voyager and Precedent units. Set up appropriate access equipment before servicing; two-person filter handling is recommended at this size. Confirm access panel fastener type before attending the unit — some YCD/TCD configurations use hex-head or Allen bolts rather than Dzus fasteners.
• Intellipak I / II (25–130 ton): The Intellipak is a large-footprint commercial packaged unit with a dedicated economizer section that may span the full width of the unit face. The FLR06788 filter (19×60-3/4×1) is a long single-piece filter that spans the full economizer inlet width. Under no circumstances should this filter be cut or modified in the field — the full-width coverage is critical to prevent unfiltered air bypass across the economizer coil. Two-person handling is required; appropriate lift equipment may be necessary for high-parapet installations.
• American Standard Precedent and Voyager: Procedure is identical to the corresponding Trane-branded units. American Standard Precedent and Voyager RTUs share the Trane cabinet and economizer section design across all model years.

Cleaning and Maintenance

Washable aluminum mesh filters are designed to be cleaned and reinstalled rather than discarded, making them both more economical and more environmentally sustainable than disposable alternatives over a multi-year maintenance program. Regular cleaning prevents the filter from reaching the point where pressure differential across a fully loaded media pack is large enough to deform the corrugated layers or push air around the frame seal.

Recommended Cleaning Frequency

A 60 to 90 day interval is a reasonable starting point for standard commercial rooftop installations. Adjust based on site conditions:

• High-particulate sites (highways, agricultural operations, construction zones, heavy vehicular traffic): inspect monthly, clean every 30–60 days.
• Cottonwood or heavy pollen seasons: inspect weekly during peak season. Cottonwood loading can fully block an aluminum mesh filter in 2–3 weeks in affected climates.
• Coastal installations: rinse with fresh water every 60 days to remove salt accumulation even when the filter is not otherwise visibly dirty.
• Low-particulate urban or suburban sites: 90-day intervals are typically sufficient.

Cleaning Procedure

1. Remove the filter from the unit (reverse of installation sequence). Cleaning in place is not recommended as it directs wash water into the economizer section and may wet downstream filters or the coil face.
2. Transport to a suitable cleaning area with hose access or a drain. For high-rise units without rooftop hose access, a wet/dry vacuum handles dry debris removal as an alternative.
3. Rinse with a garden hose or pressure washer on low setting, directing water countercurrent to the original airflow direction — in through the back of the filter, out through the face — to dislodge captured particles rather than driving them deeper into the media layers.
4. For heavy fouling (cottonwood packing, grease-laden intake air, industrial environments): apply a mild detergent or degreaser diluted per the product label, allow a 5-minute dwell, then rinse thoroughly in both directions until rinse water runs clear.
5. Shake excess water from the filter and inspect the frame and media for damage before reinstalling. Look for bent sections, separated corner miters, or media deformation that would create gaps.
6. Allow to air-dry before reinstalling if ambient temperatures are at or below freezing. In warmer conditions, installing a wet filter is acceptable — the unit’s airflow completes the drying within minutes.

When to replace rather than clean: Retire the filter when the aluminum frame shows through-corrosion (pinholes or cracks), when a corner miter has separated beyond re-squaring, or when the media has been physically deformed in a way that creates a persistent bypass gap in the filter track. A filter that still seals cleanly and whose media is physically intact can continue to be cleaned and reinstalled indefinitely within the 5–10 year service life guideline.

Frequently Asked Questions

Are these direct OEM replacements for the original Trane filters?

Yes. Each filter is manufactured to match the exact dimensional specification of the corresponding Trane OEM part number, including face dimensions, media depth, and frame wall thickness. Our filters are aftermarket replacements made in the USA by Metal Air Filters and do not carry the Trane brand name, but dimensional and performance compatibility with the OEM specification is confirmed for every part number listed on this page. The UL 900 Class 1 rating and dust arrestance figures are equivalent to or exceed the original specification.

What is the difference between the AG0320xxx and FLR-prefix part numbers?

Both families cover corrugated aluminum mesh economizer filters. The AG0320xxx designation is Trane’s internal scheme for standard sizes across its core RTU product line — five sizes in 1” depth and one in 2” depth. The FLR-prefix designation covers additional standard sizes (FLR00537 is a 20×25×1 filter used in many of the same applications as AG0320104) as well as non-standard exact-dimension configurations like the FLR06788 (19×60-3/4×1) and FLR09410 (23.75×38×1) used in higher-tonnage and specialized installations.

Do these filters fit American Standard rooftop units?

Yes. American Standard and Trane are sister brands within Trane Technologies. Their commercial rooftop units share filter specifications across the Precedent and Voyager model families. If your American Standard unit specifies an AG0320xxx or FLR-prefix part number, our replacement is a direct dimensional fit.

How long will a Trane washable aluminum mesh filter last?

Under normal maintenance conditions — cleaning every 60 to 90 days and frame inspection at each cleaning — these filters deliver a 5 to 10 year service life. The corrugated aluminum media does not degrade from repeated washing or long-term outdoor exposure, and the all-aluminum frame resists typical rooftop corrosion. Retire the filter when the frame shows through-corrosion, a corner joint has separated irreparably, or the media has been physically deformed in a way that creates a persistent bypass gap.

What if my Trane unit requires a non-standard filter size?

Metal Air Filters manufactures custom-cut aluminum mesh filters to exact face dimensions and depth specifications. If your economizer requires a size not shown in our standard catalog — including fractional-dimension filters and sizes larger than our listed stock — contact us with the exact face measurements (height × width × depth to the nearest 1/16”) and we will fabricate to specification from the same UL 900 Class 1 rated materials used in our standard catalog products. Browse our custom filter options for reference.

Can I wash the filter while it is still installed in the unit?

We recommend removing the filter for cleaning rather than washing it in place. In-place washing directs water into the economizer section, potentially wetting the downstream pleated or MERV-rated filters and the coil face. Wet downstream filters can collapse or lose structural integrity, and wetting an evaporator coil in freezing conditions can cause ice formation that damages the aluminum fins. Filter removal adds roughly 5 minutes to the process and allows for thorough rinsing from both sides, complete inspection, and proper drying assessment before reinstallation.

Are these filters rated for continuous outdoor exposure?

Yes. The corrugated aluminum media and aluminum alloy frame are both specified for outdoor service as required by the rooftop economizer application. The UL 900 Class 1 rating confirms flame-spread characteristics appropriate for air-handling applications, and the 275°F continuous temperature rating far exceeds any temperature encountered in a rooftop economizer intake under normal operating conditions. In severe coastal or industrial chemical environments, inspect the frame more frequently for accelerated corrosion and plan for replacement at the lower end of the 5–10 year service life guideline.