{"product_id":"bonsai-4-x-2-ft-99-99-hepa-flowhood-fan-filter-unit-ffu-120v","title":"Bonsai 4 x 2 ft 99.99% HEPA Flowhood Fan Filter Unit (FFU) 120V","description":"\u003cstyle\u003e\n    #bonsai-ffu-4x2 { line-height: 1.6; color: #222; }\n    #bonsai-ffu-4x2 h2 { font-size: 1.5em; margin-top: 1.6em; margin-bottom: 0.5em; padding-bottom: 6px; border-bottom: 2px solid #e5e5e5; }\n    #bonsai-ffu-4x2 h3 { font-size: 1.15em; margin-top: 1.2em; margin-bottom: 0.4em; color: #1a6b3a; }\n    #bonsai-ffu-4x2 p { margin: 0 0 1em; }\n    #bonsai-ffu-4x2 ul { padding-left: 20px; margin: 0.5em 0 1.2em; }\n    #bonsai-ffu-4x2 li { margin-bottom: 0.5em; }\n    #bonsai-ffu-4x2 a { color: #1a6b3a; text-decoration: underline; }\n    #bonsai-ffu-4x2 a:hover { color: #0e4423; }\n    #bonsai-ffu-4x2 .lead { font-size: 1.1em; font-weight: 600; color: #1a4023; margin-bottom: 0.8em; }\n    #bonsai-ffu-4x2 table.spec-table { width: 100%; border-collapse: collapse; margin: 0.5em 0 1.5em; font-size: 0.97em; }\n    #bonsai-ffu-4x2 table.spec-table th { text-align: left; background: #f2f5f2; padding: 10px 14px; border-bottom: 2px solid #1a6b3a; font-size: 1.05em; color: #1a4023; }\n    #bonsai-ffu-4x2 table.spec-table td { padding: 9px 14px; border-bottom: 1px solid #e8e8e8; vertical-align: top; }\n    #bonsai-ffu-4x2 table.spec-table td:first-child { font-weight: 600; width: 42%; color: #333; }\n    #bonsai-ffu-4x2 table.spec-table tr:nth-child(even) td { background: #fafbfa; }\n    #bonsai-ffu-4x2 .ffu-callout { background: #f2f5f2; border-left: 4px solid #1a6b3a; padding: 14px 18px; margin: 1.2em 0; border-radius: 4px; }\n    #bonsai-ffu-4x2 .ffu-callout p:last-child { margin-bottom: 0; }\n    #bonsai-ffu-4x2 .video-wrap { max-width: 900px; margin: 16px auto; }\n  \u003c\/style\u003e\n\u003cdiv id=\"bonsai-ffu-4x2\"\u003e\n\u003cp class=\"lead\"\u003eCommercial cleanroom performance in a compact 14\" deep design.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBonsai 4' × 2' HEPA Fan Filter Unit (FFU)\u003c\/strong\u003e is our largest \u003cstrong\u003efan filter unit for mushroom cultivation\u003c\/strong\u003e and laboratory work — delivering professional ISO Class 5 \/ Class 100 laminar airflow for mycology labs, tissue culture, agar work, sterile transfers, and clean-air environments, all while keeping a compact footprint that fits on standard worktables.\u003c\/p\u003e\n\u003cp\u003eUnlike many low-cost FFUs that use thin housings and plastic blower assemblies, every Bonsai FFU is engineered with upgraded premium components for smoother airflow, quieter operation, improved durability, and longer service life.\u003c\/p\u003e\n\u003cp\u003eDesigned for serious growers and laboratory professionals, this 4' × 2' FFU provides the largest sterile workspace in our FFU lineup while remaining manageable for home labs, commercial grow rooms, and dedicated clean-air workstations. It's also an excellent choice for clean room builds and room pressurization, where its higher airflow keeps a space flooded with HEPA-filtered air.\u003c\/p\u003e\n\u003cdiv class=\"ffu-callout\"\u003e\n\u003cp\u003e\u003cstrong\u003eFFU or full laminar flow hood?\u003c\/strong\u003e This FFU works as a complete flow hood solution for most growers, and its larger filter face gives you more usable working area. To compare both options before you buy, read our \u003ca href=\"https:\/\/www.midwestgrowkits.com\/blogs\/news\/laminar-flow-hood-or-ffu-whats-the-difference-and-which-one-should-you-buy\"\u003eLaminar Flow Hood vs FFU guide\u003c\/a\u003e — we built and tested both to show exactly where each one shines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWhy Growers Choose the Bonsai 4×2 FFU\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrue H14 HEPA Filtration\u003c\/strong\u003e – Certified 99.995% efficiency at 0.3 microns for ISO Class 5 \/ Class 100 clean-air performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLargest 4' × 2' Sterile Work Area\u003c\/strong\u003e – The most working room in our FFU lineup, perfect for agar pours, grain transfers, liquid culture, and high-volume inoculation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Aluminum Centrifugal Blower\u003c\/strong\u003e – Backward-curved aluminum fan for smoother airflow, longer lifespan, and quieter operation than plastic blower systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact 14\" Deep Housing\u003c\/strong\u003e – Fits comfortably on standard stainless tables and workbenches despite the large filter face\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWashable Magnetic Pre-Filter\u003c\/strong\u003e – Reusable electrostatic pre-filter helps extend HEPA filter life and reduce maintenance costs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for Long-Term Reliability\u003c\/strong\u003e – Durable powder-coated housing designed for commercial laboratory use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18-Month Warranty\u003c\/strong\u003e – Backed by an industry-leading warranty for added peace of mind\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat You Can Do With This FFU\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePerform sterile \u003cstrong\u003eagar pours and transfers\u003c\/strong\u003e across a wide clean-air zone\u003c\/li\u003e\n\u003cli\u003eInoculate \u003cstrong\u003egrain jars, spawn bags, and bulk substrate\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHandle \u003cstrong\u003eliquid culture and cloning work\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCreate a dedicated \u003cstrong\u003eclean-air workstation\u003c\/strong\u003e for laboratory procedures\u003c\/li\u003e\n\u003cli\u003ePressurize a \u003cstrong\u003eclean room or grow space\u003c\/strong\u003e with HEPA-filtered air\u003c\/li\u003e\n\u003cli\u003eUpgrade from a still air box to \u003cstrong\u003etrue HEPA-filtered laminar airflow\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ch3\u003eHEPA Filtration System\u003c\/h3\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHEPA Filter\u003c\/td\u003e\n\u003ctd\u003eTrue H14 — 99.995% efficiency at 0.3 microns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClean-Air Rating\u003c\/td\u003e\n\u003ctd\u003eISO Class 5 \/ Class 100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Media\u003c\/td\u003e\n\u003ctd\u003eHigh-efficiency microfiber in a durable aluminum alloy frame\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-Filter\u003c\/td\u003e\n\u003ctd\u003eWashable magnetic electrostatic pre-filter (MERV 5 \/ G4, 95% at 5µm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eAirflow \u0026amp; Performance\u003c\/h3\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSetting\u003c\/th\u003e\n\u003cth\u003eAirflow\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFan Control\u003c\/td\u003e\n\u003ctd\u003e3-speed adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh Speed\u003c\/td\u003e\n\u003ctd\u003e160 FPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMedium Speed\u003c\/td\u003e\n\u003ctd\u003e120 FPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow Speed\u003c\/td\u003e\n\u003ctd\u003e95 FPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAverage Airflow\u003c\/td\u003e\n\u003ctd\u003e500–530 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAverage Velocity\u003c\/td\u003e\n\u003ctd\u003e100–120 FPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eMotor \u0026amp; Construction\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackward-curved aluminum centrifugal blower\u003c\/strong\u003e for smoother airflow and durability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20-gauge powder-coated housing\u003c\/strong\u003e with commercial-grade construction\u003c\/li\u003e\n\u003cli\u003eIntegrated pull handles for portability\u003c\/li\u003e\n\u003cli\u003eStandard 110\/120V grounded plug — no special wiring required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNoise \u0026amp; Power Efficiency\u003c\/h3\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMetric\u003c\/th\u003e\n\u003cth\u003eRating\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise Level\u003c\/td\u003e\n\u003ctd\u003eApproximately 50–60 dBA (comparable to a window AC unit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eApproximately 250W at 100 FPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eDimensions \u0026amp; Weight\u003c\/h3\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasurement\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e49\" W × 26\" H × 14\" D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e88 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHEPA Resistance\u003c\/td\u003e\n\u003ctd\u003e0.327–0.682 IWG @ ~525–530 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWashable Magnetic Pre-Filter\u003c\/h2\u003e\n\u003cp\u003eThe included reusable electrostatic pre-filter captures larger airborne particles before they reach the HEPA filter, maximizing filter lifespan and reducing maintenance costs. Unlike the disposable pre-filters found on lower-end FFUs, the Bonsai magnetic pre-filter is fully washable and designed for long-term reuse.\u003c\/p\u003e\n\u003ch2\u003eWho This FFU Is Best For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSerious growers and laboratory professionals running high-volume sterile work\u003c\/li\u003e\n\u003cli\u003eCommercial grow rooms and small production facilities\u003c\/li\u003e\n\u003cli\u003eClean room builds and grow-space pressurization\u003c\/li\u003e\n\u003cli\u003eAnyone who wants the maximum working area in our FFU lineup\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eReplacement Filters\u003c\/h2\u003e\n\u003cp\u003eHEPA filters are consumables that gradually load with particulates over time. A \u003ca href=\"https:\/\/www.midwestgrowkits.com\/products\/bonsai-ffu-99-99-hepa-replacement-filter-for-2x4-fan-filter-unit\"\u003ereplacement H14 HEPA filter for the 4×2 FFU\u003c\/a\u003e is available so you can keep a spare on hand. The washable magnetic pre-filter extends the main HEPA filter's life by catching larger particles first, so under normal use you'll replace filters far less often than with a standard FFU.\u003c\/p\u003e\n\u003ch2\u003e18-Month Warranty\u003c\/h2\u003e\n\u003cp\u003eEvery Bonsai FFU is backed by our \u003cstrong\u003e18-Month Limited Warranty\u003c\/strong\u003e, covering manufacturer defects and workmanship issues under normal use. Built with upgraded premium components and commercial-grade construction, these FFUs are designed for years of reliable operation in laboratory and mycology environments.\u003c\/p\u003e\n\u003ch2\u003eBonus Offer\u003c\/h2\u003e\n\u003cdiv class=\"ffu-callout\"\u003e\n\u003cp\u003e\u003cstrong\u003eBuy any Bonsai FFU or Flow Hood and save 50% on compatible accessories and replacement filters.\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003eAccessories must be purchased at the same time for the discount to apply.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFREE freight shipping\u003c\/strong\u003e within the continental USA\u003c\/li\u003e\n\u003cli\u003eShipped securely on a pallet for protection during transit\u003c\/li\u003e\n\u003cli\u003eUnopened units eligible for return\u003c\/li\u003e\n\u003cli\u003eOpened units eligible for exchange only\u003c\/li\u003e\n\u003cli\u003eShipping damage replacements handled promptly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eProduct Video\u003c\/h2\u003e\n\u003cdiv class=\"video-wrap\"\u003e\n\u003cdiv style=\"position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; border-radius: 8px;\"\u003e\u003ciframe src=\"https:\/\/player.vimeo.com\/video\/913861820?badge=0\u0026amp;autopause=0\u0026amp;player_id=0\u0026amp;app_id=58479\" title=\"Introduction to FFUs (Fan Filter Units)\" style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0;\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Midwest Grow Kits","offers":[{"title":"Default Title","offer_id":44595535347815,"sku":"FFU4","price":1149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/3699\/8759\/files\/Bonsai_4x2_FFU.jpg?v=1789057565","url":"https:\/\/fernprairiemycosupplies.com\/products\/bonsai-4-x-2-ft-99-99-hepa-flowhood-fan-filter-unit-ffu-120v","provider":"Fern Prairie Myco Supplies","version":"1.0","type":"link"}