{"product_id":"koch-type-gd-fiberglass-cambridge-electroaire-replacement-roll","title":"Koch Type GD Fiberglass Automatic Roll Filter for Cambridge ElectroAire - 65 Foot Replacement Roll","description":"\u003cp\u003eThe Koch \u003cstrong\u003eType GD Fiberglass Automatic Roll Filter for Cambridge ElectroAire\u003c\/strong\u003e is a 65-foot fiberglass replacement roll engineered to drop directly into \u003cstrong\u003eCambridge ElectroAire\u003c\/strong\u003e automatic roll filter machines without modification. The roll is wound on a core matching the OEM specification, so it advances correctly through the existing equipment without binding or alignment issues.\u003c\/p\u003e\u003ch3\u003eIdentify your equipment and roll size\u003c\/h3\u003e\u003cp\u003eMatch your existing equipment and current roll to the correct Koch replacement using the reference chart below. Look at the size designation printed on your current roll (e.g., a number like \"2\", \"3\", \"4\") and find the matching Koch model number.\u003c\/p\u003e\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/koch_auto_roll_chart.png?v=1777741465\" alt=\"Koch Automatic Roll Filter selection chart - identify OEM equipment and roll size\" style=\"max-width: 100%; height: auto;\"\u003e\u003c\/p\u003e\u003ch3\u003eWhat you get: one 65-foot Cambridge ElectroAire-compatible roll\u003c\/h3\u003e\u003cp\u003eEach variant on this page is \u003cstrong\u003eone single roll\u003c\/strong\u003e — not a case or pack. The variant price is the per-roll price. Each roll is \u003cstrong\u003e65 feet long\u003c\/strong\u003e, scrim-backed fiberglass media, with the correct core for your equipment. Available sizes for Cambridge ElectroAire machines:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM size 2\u003c\/strong\u003e — Koch model \u003cstrong\u003eE2GD\u003c\/strong\u003e, core width \u003cstrong\u003e23-7\/8″\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM size 3\u003c\/strong\u003e — Koch model \u003cstrong\u003eE3GD\u003c\/strong\u003e, core width \u003cstrong\u003e32-7\/8″\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM size 4\u003c\/strong\u003e — Koch model \u003cstrong\u003eE4GD\u003c\/strong\u003e, core width \u003cstrong\u003e44-7\/8″\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM size 5\u003c\/strong\u003e — Koch model \u003cstrong\u003eE5GD\u003c\/strong\u003e, core width \u003cstrong\u003e56-7\/8″\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM size 6\u003c\/strong\u003e — Koch model \u003cstrong\u003eE6GD\u003c\/strong\u003e, core width \u003cstrong\u003e65-7\/8″\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM size 6III\u003c\/strong\u003e — Koch model \u003cstrong\u003eE6IIIGD\u003c\/strong\u003e, core width \u003cstrong\u003e68-7\/8″\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eType GD fiberglass media construction\u003c\/h3\u003e\u003cp\u003eType GD is Koch's standard fiberglass automatic roll media:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e High-quality spun glass (fiberglass), progressively dense with adhesive gel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 65 feet per roll\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Blue tint on the air-entering side (Koch standard for Type GD)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBacking:\u003c\/strong\u003e Full-width integral scrim backing — protects against necking and fiber break-off as media tensions through the machine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInitial pressure drop:\u003c\/strong\u003e 0.14″ w.g. at 500 FPM face velocity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDust holding capacity:\u003c\/strong\u003e 70 grams\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArrestance:\u003c\/strong\u003e ~80% per ASHRAE 52.1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Most commercial and industrial automatic roll machines operating at normal air velocities (around 500 FPM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference bulletin:\u003c\/strong\u003e Koch K-11586\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCore specification for Cambridge ElectroAire machines\u003c\/h3\u003e\u003cp\u003e3\/4″ I.D. metal pipe with metal end plates approximately 11″ in diameter attached on each end. This core configuration matches the original Cambridge ElectroAire machine specification, allowing the roll to feed and tension correctly through the existing drive mechanism.\u003c\/p\u003e\u003cp\u003eTo insure easy installation, \u003cstrong\u003epaper leaders and trailers are furnished with each roll\u003c\/strong\u003e — thread the leader through the take-up mechanism the same way you thread the existing roll, and the new media will follow correctly.\u003c\/p\u003e\u003ch3\u003eWhen the Type GD for Cambridge ElectroAire is specified\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement media for existing Cambridge ElectroAire automatic roll machines\u003c\/strong\u003e — the primary application for this product\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommercial buildings\u003c\/strong\u003e — office buildings, schools, hotels, retail with installed automatic roll filtration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHospitals and healthcare facilities\u003c\/strong\u003e — large air handlers using continuous-feed roll filtration as a primary or pre-filter stage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversities and major institutions\u003c\/strong\u003e — building-scale HVAC systems with automatic roll equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial manufacturing\u003c\/strong\u003e — large-volume air handling where continuous-feed filtration eliminates manual filter changeouts during production\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquipment protection\u003c\/strong\u003e — protects coils, blowers, and downstream filtration in any system using automatic roll equipment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat Type GD captures\u003c\/h3\u003e\u003cp\u003eType GD is a \u003cstrong\u003estandard-efficiency fiberglass media\u003c\/strong\u003e engineered for \u003cstrong\u003emaximum airflow with reliable dust capture\u003c\/strong\u003e. It captures larger airborne dust, lint, hair, and pollen at face velocities up to 500 FPM, with low pressure drop (0.14″ w.g. initial). Efficiency builds as the media loads — particles caught in the upstream layers help capture finer particles further downstream.\u003c\/p\u003e\u003cp\u003eThis is an \u003cstrong\u003eequipment-protection efficiency tier\u003c\/strong\u003e, suited to systems where high airflow and continuous operation matter more than fine-particle capture. For higher-efficiency requirements, consider a multi-stage system with the Type GD as a continuous-feed pre-filter ahead of a higher-MERV final stage.\u003c\/p\u003e\u003ch3\u003eOther OEM equipment compatibility\u003c\/h3\u003e\u003cp\u003eKoch produces Type GD fiberglass rolls for the major automatic roll filter equipment manufacturers. Each OEM uses a different core specification, so each replacement is built specifically for its target equipment. Match the roll to your existing machine:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eAAF Roll-O-Mat\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAir Maze Rollamaze\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCambridge ElectroAire (this product)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCarrier (31NA-series)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBLC Industries\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCommercial Filter Fulflo \/ Mine Safety Roll-Aire\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eContinental Conomanuel \/ Conomatic\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFarr Roll Kleen\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTrane Roll Filter\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIf your equipment isn't listed above or you aren't sure which Koch part fits, \u003ca href=\"\/pages\/quote\"\u003erequest a quote\u003c\/a\u003e with the make and model of your roll filter machine and we'll confirm the right part number.\u003c\/p\u003e\u003ch3\u003eOther Koch automatic roll media options\u003c\/h3\u003e\u003cp\u003eKoch offers automatic roll media in multiple grades to match different application requirements:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType GD (this product):\u003c\/strong\u003e Standard fiberglass spun glass, 65 foot rolls, blue tint. Equipment protection at 500 FPM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType GHD:\u003c\/strong\u003e Premium heavy-duty fiberglass with the highest concentration of glass and adhesive gel. Yellow tint. For extreme conditions or high contaminant loading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType P:\u003c\/strong\u003e 100% polyester synthetic, 65 foot rolls, white. For hospitals and food processing where fiberglass break-off is not permitted.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType MD:\u003c\/strong\u003e High-loft polyester with no fiberglass content, 45 foot rolls. Used in hospitals and food plants for the same fiberglass-free reason.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType ST:\u003c\/strong\u003e Tackified synthetic, 65 foot rolls. Treated downstream with adhesive for enhanced dust holding. Used in critical-clean-air applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003ca href=\"\/pages\/quote\"\u003eRequest a quote\u003c\/a\u003e for any of the alternate media types in the Cambridge ElectroAire core configuration.\u003c\/p\u003e\u003ch3\u003eSizing and ordering notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatch the OEM size designation on your current roll\u003c\/strong\u003e to the variant dropdown. The size code is printed on the roll core or end plate of your existing media. The Koch model number (the variant's code) is the actual part number for ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfirm core width\u003c\/strong\u003e against the dimensions shown in each variant. The \"core width\" is the actual width of the media roll — it must match your machine's carriage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold per roll.\u003c\/strong\u003e Each variant is one 65-foot roll. Order multiple rolls by adjusting the quantity at checkout.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeed a different OEM equipment compatibility?\u003c\/strong\u003e See the cross-links above for the other eight OEM-specific products in our Koch Type GD line.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeed a different media type?\u003c\/strong\u003e Type P (synthetic, 65 foot), Type MD (high-loft synthetic, 45 foot), Type ST (tackified synthetic), or Type GHD (premium heavy-duty fiberglass) are also available. \u003ca href=\"\/pages\/quote\"\u003eRequest a quote\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement guarantee:\u003c\/strong\u003e All Koch Automatic Rolls are guaranteed to meet or exceed OEM specifications. Every roll is subjected to quality control inspection of media and winding technique before shipping.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Koch","offers":[{"title":"Size 2 - E2GD (23-7\/8\" core)","offer_id":44118934683770,"sku":"109-700-016","price":469.95,"currency_code":"USD","in_stock":true},{"title":"Size 3 - E3GD (32-7\/8\" core)","offer_id":44118934716538,"sku":"109-700-017","price":576.23,"currency_code":"USD","in_stock":true},{"title":"Size 4 - E4GD (44-7\/8\" core)","offer_id":44118934749306,"sku":"109-700-018","price":699.27,"currency_code":"USD","in_stock":true},{"title":"Size 5 - E5GD (56-7\/8\" core)","offer_id":44118934782074,"sku":"109-700-019","price":711.6,"currency_code":"USD","in_stock":true},{"title":"Size 6 - E6GD (65-7\/8\" core)","offer_id":44118934814842,"sku":"109-700-020","price":918.76,"currency_code":"USD","in_stock":true},{"title":"Size 6III - E6IIIGD (68-7\/8\" core)","offer_id":44118934847610,"sku":"109-700-021","price":918.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1130\/9462\/files\/getimage2_927d286e-6417-4f36-aea4-7d49d77dd93f.png?v=1777743471","url":"https:\/\/www.rememberthefilter.com\/products\/koch-type-gd-fiberglass-cambridge-electroaire-replacement-roll","provider":"RememberTheFilter.com","version":"1.0","type":"link"}