{"product_id":"23-1-4x23-1-4x4-koch-multi-pleat-gt-hd1-merv-8-102-725-090","title":"23-1\/4 x 23-1\/4 x 4 Koch Multi-Pleat GT-HD1 Heavy-Duty MERV 8 102-725-090 (5 Filters)","description":"\u003cp\u003eThe \u003cstrong\u003eKoch Multi-Pleat GT-HD1\u003c\/strong\u003e (part number 102-725-090, \u003cstrong\u003e23-1\/4 x 23-1\/4 x 4\u003c\/strong\u003e) is a \u003cstrong\u003eheavy-duty pleated panel filter\u003c\/strong\u003e at \u003cstrong\u003eMERV 8\u003c\/strong\u003e, engineered specifically for gas turbine applications where filter durability and extended service life are mission-critical.\u003c\/p\u003e\u003cp\u003eThe GT-HD1 is built around the heaviest construction in Koch’s panel line. The frame is \u003cstrong\u003e0.056″ thick beverage board\u003c\/strong\u003e — roughly twice the thickness of standard pleated panel frames — with wet-strength treatment for high-moisture installations. The \u003cstrong\u003e100% synthetic high-loft polyester\u003c\/strong\u003e media is bonded to a \u003cstrong\u003erust-resistant heavy-duty expanded metal backing\u003c\/strong\u003e that holds pleat geometry through the entire service life. \u003cstrong\u003eUpstream support fingers\u003c\/strong\u003e add stability under high-volume continuous airflow. The result is a filter engineered to survive conditions that would shred conventional pleated panels.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePneumafil OEM cross-reference:\u003c\/strong\u003e The 4″ exact-depth size (23-1\/4 x 23-1\/4 x 4) is built to replace the Pneumafil OEM dimensional specification, making this a direct drop-in for installations originally specified for Pneumafil filters.\u003c\/p\u003e\u003ch3\u003eWhen Multi-Pleat GT-HD1 is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas turbine inlet filtration\u003c\/strong\u003e — the primary design target; built for the dust loads, airflow volumes, and continuous duty of turbine inlet stages\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenerator and large compressor inlet stages\u003c\/strong\u003e — same heavy-duty profile applies to any large rotating-equipment inlet application\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial pre-filter applications\u003c\/strong\u003e — longer service life than standard pleated panels in dust-loaded, continuous-duty environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-moisture industrial sites\u003c\/strong\u003e — .056″ wet-strength frame holds up where standard frames would degrade or warp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive maintenance environments\u003c\/strong\u003e — the heavy expanded metal backing and reinforced frame survive rough handling during changeouts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign and construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 100% synthetic high-loft polyester (HD1 standard media)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBacking:\u003c\/strong\u003e Rust-resistant heavy-duty expanded metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e 0.056″ heavy wet-strength beverage board (twice the thickness of standard pleated panels)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupport:\u003c\/strong\u003e Heavy-duty galvanized wire support with upstream support fingers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Heavy-duty pleated panel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency rating:\u003c\/strong\u003e MERV 8 per ASHRAE Test Standard 52.2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListings:\u003c\/strong\u003e UL Classified per UL Standard 900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e 5 filters per case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat MERV 8 captures\u003c\/h3\u003e\u003cp\u003eCaptures dust mite debris, pollen, mold spores, pet dander, and most household and office airborne dust. The standard residential and commercial efficiency for everyday indoor air quality, balancing capture performance with airflow.\u003c\/p\u003e\u003ch3\u003eHD1 vs. HD3 media options\u003c\/h3\u003e\u003cp\u003eKoch offers the GT-HD line in two media alternatives. The \u003cstrong\u003eHD1\u003c\/strong\u003e media (this filter) is the standard option, balancing efficiency, low resistance to airflow, and high dust-holding capacity. The \u003cstrong\u003eHD3\u003c\/strong\u003e upgrade option is engineered for applications where even longer filter life and higher efficiencies are required. HD3 is not stocked on this listing — contact us for pricing if your application requires the upgrade media.\u003c\/p\u003e\u003ch3\u003eMulti-Pleat GT vs. GT-HD: which to choose\u003c\/h3\u003e\u003cp\u003eBoth filters share the gas turbine heritage and MERV 8 rating, but they target different operating conditions. The \u003cstrong\u003eMulti-Pleat GT\u003c\/strong\u003e uses standard beverage board frame and synthetic media — the right choice for general heavy-duty commercial HVAC and lighter-duty turbine applications. The \u003cstrong\u003eGT-HD1\u003c\/strong\u003e (this filter) doubles the frame thickness, switches to high-loft polyester media on an expanded metal backing, and adds upstream support fingers — the right choice for demanding continuous-duty turbine inlets, high-moisture sites, and applications where maximum filter longevity and structural integrity matter more than upfront cost.\u003c\/p\u003e\u003ch3\u003eImportant sizing and ordering notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis is a non-standard nominal size built specifically for gas turbine OEM specifications.\u003c\/strong\u003e Confirm your housing dimensions before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull carton quantities only.\u003c\/strong\u003e Per Koch’s shipping policy, GT-HD ships in full carton quantities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIf you need a 24x24x4 nominal size GT-HD1 element\u003c\/strong\u003e for an existing reusable frame, see the GT-HD1 Insert (102-727-031) listing — that is the media and wire element only, with no frame.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTrademark notice\u003c\/h3\u003e\u003cp\u003ePneumafil® is a trademark or registered trademark of its respective company. References to brand names and dimensional specifications are for product identification only and are not intended to imply any affiliation, endorsement, or sponsorship.\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":44118793158778,"sku":"102-725-090","price":252.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_baff5fc1-4725-487d-855e-851fcd1823f8.png?v=1777663157","url":"https:\/\/www.rememberthefilter.com\/products\/23-1-4x23-1-4x4-koch-multi-pleat-gt-hd1-merv-8-102-725-090","provider":"RememberTheFilter.com","version":"1.0","type":"link"}