Used J-Tec Product Silo, Large Cabinet for sale (33,592)

Condition: used, This listing is for a CAS BioMAT Class 2 Microbiological Safety Cabinet. The unit is in full working condition and is ready for immediate release. The BioMAT 2 combines decades of expertise in containment design to offer a range of Class 2 microbiological safety cabinets that prioritize safety, ease of use, and energy efficiency. It provides protection for operators and products while handling biological agents up to Hazard Group 3. Key Features: - User-Friendly Interface: Equipped with a 10cm x 6cm TFT touchscreen displaying real-time cabinet operations and an animated airflow diagram. Intuitive controls with crystal-clear iconography simplify functionality, while a four-digit password ensures security. - Energy Efficiency: Features energy-efficient EC fan technology and low-loss filters, consuming only 140W under typical operational performance (0.6 m/sec inflow and 0.35 m/sec downflow). The set-back mode reduces energy usage by automatically adjusting settings when the cabinet is unattended. - Safety Mechanisms: Full-width LED lighting provides clear indications of any airflow issues, supported by audible alarms and large red LED alerts for malfunctions. The animated airflow diagram gives instant feedback on cabinet status. - Quiet Operation: Designed with EC fans and noise reduction technology, the typical noise level is just 49dBA for the 1200mm models, ensuring a comfortable work environment. - Sustainability: The BioMAT 2 has achieved CarbonNeutral® product certification, contributing to laboratory carbon reduction goals. Product Specifications: - Construction: - Cabinet: 1.5mm mild steel - Inner Liner: Grade 304 stainless steel - Side Windows: 5mm UV-resistant toughened glass - Front Visor Options: - Fixed 200mm aperture with a night door for fumigation. - Aerosol-tight motorized sliding sash with anti-trap reverse function (BioMAT 2-S2). Exhaust Options: - Standard Exhaust: Single HEPA filter with anti-blowback damper. Gedpfx Aexxyctsivokc - Thimble Exhaust: Double HEPA filters for enhanced safety. - Recirculation: Double HEPA filters with options for vertical or horizontal air discharge. - Worktrays: Made from grade 316 stainless steel, available in single or divided sections to meet user needs. - Support Stands: Options include fixed height, manually adjustable, or fully DDA-compliant motorized stands. Applications - The BioMAT 2 is ideally suited for laboratories handling biological agents and provides a flexible design tailored to specific laboratory requirements.

Condition: used, Safe - Security Cabinet - Fireproof Safe LIPS presumably a data protection cabinet Internal dimensions: W=1080 mm, H=1500 mm, D=440 mm Presumably provides 120 minutes of fire protection - 2-door - Interior with 2 shelves Gkedpfx Aijxcivksvjc - Internal door for enhanced fire protection - Bolt mechanism with 3-sided locking - Key lock with one key External dimensions: W=1400 mm, D=720 mm, H=1850 mm Weight: approx. 600 kg in good condition

Condition: used, Year of construction: 2014, functionality: fully functional, power: 7.5 kW (10.20 HP), input voltage: 400 V, input frequency: 50 Hz, type of input current: three-phase, volume flow: 6,000 m³/h, overall weight: 900 kg, inlet: 300 mm, negative pressure: 2,900 Pa, rotational speed (max.): 3,000 rpm, We offer our Höcker Polytechnik Vacumobil JT300-L – Industrial Dust Extraction Unit The Höcker Polytechnik Vacumobil JT300-L is a high-performance mobile industrial dust extraction system, designed for continuous operation in demanding woodworking and production environments. Equipped with automatic jet-cleaning (compressed air filter cleaning), this unit ensures consistent suction performance without downtime, making it ideal for workshops running multiple machines simultaneously. Key Specifications: Motor power: 7.5 kW Airflow capacity: 6,000 m³/h Working airflow: 5,100 m³/h Negative pressure: 3,100 Pa Filter surface area: 28 m² Extraction inlet: 300 mm Collection capacity: large multi-bin system 500 liters Main Advantages: Continuous operation thanks to automatic jet-cleaning system Gkodpfxoygw Rxe Aivjc High extraction capacity – suitable for multiple machines (CNC, edge banders, planers, etc.) Industrial-grade safety features, including backflow protection and integrated fire safety options Energy-efficient motor technology (IE3 / optional IE5) Robust and reliable German engineering Applications - perfect for: Woodworking workshops CNC machining centers Furniture production Medium to large industrial operations The JT300-L offers nearly double the capacity of smaller models (e.g. JT200), making it the ideal solution for businesses looking to scale up production while maintaining a clean and safe working environment. We also sell our smaller Höcker Polytechnik Vacumobil JT200-L on Machineseeker. If you have any questions or need more information, feel free to send us a message or give us a call.

Condition: used, Second-hand New eco-tec ALLin DRYer belt dryer for drying wood chips for the production of briquettes. Possible products: Separated fermentation substrate (fine-textured, air-permeable, frost-free, free from foreign matter, fully fermented; base material: maize silage, slurry, cereals, ≥30% dry matter) Wood chips G30 (free-flowing, air-permeable, frost-free, > 0°C, low in resin, free of coarse material, free of foreign matter) Technical data: - Heating medium: Hot water 90°C flow / 70°C return - Heating capacity: ~ 400 kW - Drying temperature: approx. 80 °C at 90° flow - Weight: ~ 12 t Gkjdpfszzk H Uex Aivec

Condition: excellent (used), For Sale: Silomat Pneumatic Conveying Systems / Silo Pumps (Gravity & Pressure Types) We offer a wide range of Silomat conveying systems from various brands for sale, available in both gravity (free-fall type) and pressure configurations. All units have been completely OVERHAULED and professionally reconditioned: Oil replacement New composite vanes Gkedpfx Aiolf Niqovsc New bearings Professionally sandblasted and fully painted The machines are ready for operation and available for purchase either with brand-new accessories or without. Available Gravity / Free-Fall Models (approx. 40 units in stock): PFT E100L MALTECH MB100 M-TEC F100E Contact us for more details, pricing, and available configurations.

Condition: good (used), Rittal PS 4806 Modular Control Cabinet Product description PS 4000 modular system Manufacturer: Rittal Modular system: PS 4000 Model: PS 4806 Enclosure frame: 1.5 mm steel sheet Roof: 1.5 mm steel sheet Door: 2.0 mm steel sheet Rear panel: 1.5 mm steel sheet Mounting plate: 3.0 mm steel sheet with zinc coating Base plates: 1.5 mm steel sheet Enclosure frame: dip-coated Gsdpfx Aijtzbxzovjkc Door, roof, and rear panel: dip-coated Powder-coated exterior, textured paint Color: RAL 7035 4 transport eyelets Wiring diagram pocket made of steel sheet 4118000 Swiveling frame, large 19" 44 U Base system as a stable cabinet base Control cabinet cooler SK 3296100 Dimensions (H x W x D) 2500 x 800 x 600 mm You can find more items in other sizes – new and used – in our shop! International shipping costs available upon request!

Condition: used, axle configuration: > 3 axles, first registration: 12/2005, total length: 12,590 mm, total width: 2,500 mm, suspension: air, tire size: 385/55 R 22.5, wheelbase: 9,860 mm, Year of construction: 2005, Equipment: ABS, = Additional Options and Accessories = - Lift axle - Air suspension = Further Information = Axle configuration Tire size: 385/55 R 22.5 Axle brand: BPW Brakes: Drum brakes Suspension: Air suspension Rear axle 1: Tire tread depth left: 45%; Tire tread depth right: 45% Rear axle 2: Steerable; Tire tread depth left: 30%; Tire tread depth right: 30% Rear axle 3: Tire tread depth left: 60%; Tire tread depth right: 60% Rear axle 4: Tire tread depth left: 60%; Tire tread depth right: 60% Gedpfx Aioz R Ditevokc Weights Unladen weight: 7,500 kg Payload: 45,500 kg GVW: 53,000 kg Condition Damage: none Identification License plate: OJ-17-DH

Condition: excellent (used), I sell in very good condition TIG welder, L-TEC 200 DC. Price given for 1pc. Gkjdpfxsud R T Ss Aivjc

Condition: used, axle configuration: 3 axles, first registration: 09/2010, suspension: air, tire size: 385/65R22,5, wheelbase: 1,300 mm, Year of construction: 2010, Tyre size: 385/65R22,5 Gkjdswtf Tpopfx Aivjc Suspension: air suspension Drive: Wheel Empty weight: 6.300 kg Carrying capacity: 32.700 kg GVW: 39.000 kg Make of bodywork: SPITZER

Condition: used, axle configuration: 3 axles, first registration: 04/2011, suspension: air, tire size: 385/65R22,5, wheelbase: 1,300 mm, Year of construction: 2011, Tyre size: 385/65R22,5 Suspension: air suspension Drive: Wheel Empty weight: 6.120 kg Carrying capacity: 32.880 kg GVW: 39.000 kg Gkedpfxowtdzxo Aivjc Make of bodywork: SPITZER

Condition: as good as new (ex-display), Year of construction: 2025, functionality: fully functional, machine/vehicle number: 24-042, overall weight: 200 kg, type of input current: AC, input voltage: 230 V, belt width: 400 mm, Magnet with neodymium head roller (can also separate slightly magnetized stainless steel parts), small conveyor belt (drum motor), and feed chute. Godpfx Aoz Ihbgoivokc The conveyor belt and feed chute are adjustable. The machine is mobile on rollers, available immediately, and the price may be negotiable.

Condition: new, empty load weight: 4,830 kg, overall weight: 44,000 kg, axle configuration: 3 axles, next inspection (TÜV): 03/2026, suspension: air, tire size: 385/55R22,5, Equipment: ABS, truck registration, | D-Tec VCC Container Chassis | Center and rear extension | 1st axle can be lifted | VALX axles with disc brakes | Tires: 385/55 R22.5 | New vehicles | Subject to errors, typing errors, and prior sale. Gedpfx Aezrxbhsivekc

Condition: used, Product supply bunker “Heckmann” with hopper ± 2.000L with driven shafts with fingers to separate the product input height: ± 3,400 mm 2 x 3kW, 1500 / 16 rpm dimensions (l x w x h) : ± 2.700 x 2.600 x 3.400 mm + Elevating spiral screw “Heckmann” all stainless steel discharge height: ± 5.800 mm diameter of the screw : ± 600 mm length of the screw : ± 8.500 mm dimensions hopper: ± 1.300 x 1.000 mm Godpfxezvpm Ne Aivekc dimensions: (l x w): ± 9.200 x 1.600 mm safety grille 5.5kW, 1500/20 rpm

Condition: good (used), Year of construction: 2019, In stock is a well-preserved CNC doweling machine STARTECH CN Plus. The price is excluding VAT. Gksdpjwtnlusfx Aivsc

Year of construction: 2020, condition: used, This listing is for the Labogene ScanLaf Mars 1500 Class II biological safety cabinet The unit is in full working condition and ready for immediate us The Labogene ScanLaf Mars 1500 is a Class II biological safety cabinet designed to provide operator, product and environmental protection. It features HEPA filtration, vertical laminar airflow, motorised front window and adjustable lighting. The working width is 1500 mm and the cabinet is manufactured and tested to EN 12469 requirements. External dimensions are approximately 1604 x 797 x 2033 mm and weight is approximately 275 kg, excluding the stand. Transparency Report and Technical Audit: Software and Media Disclosure: As a Direct-from-Lab asset, any original software media or accessories found with the unit are included as a courtesy. Licensing Notice: We do not provide, transfer, or guarantee software licenses or keys. The buyer is responsible for all software licensing, registration, and workstation compatibility via the manufacturer. Notice for Procurement: This unit is sold As-Is. While we verify the power-on status and physical integrity, we do not perform analytical validation, fluidic testing, or operational calibration. Ideal for labs with in-house technical expertise or existing service agreements. Sustainability Impact: Gedpfx Aez D Dl Tjivjkc By choosing Direct Reuse, your facility avoids the carbon footprint of new manufacturing and prevents specialized materials from entering waste streams. Direct-to-Lab reuse is the most carbon-efficient way to equip a modern laboratory

Condition: excellent (used), functionality: fully functional, input voltage: 230 V, total length: 2,150 mm, year of last overhaul: 2025, total width: 550 mm, total height: 700 mm, DGUV certified until: 09/2027, conveyor belt width: 350 mm, input frequency: 50 Hz, Equipment: chassis, bm TEC Dough Conveyor Belt, long version Belt width: 350 mm Belt speed: continuously adjustable Gsdpfey Ik Arsx Aivekc Stainless steel design Includes DGUV V3 certification Dimensions approx.: 2150 x 550 x 700 mm (W x D x H) Connection: 230 V Used equipment, cleaned and SAB inspected Visit our large showroom!

Year of construction: 2010, condition: used, The belt dryer is ready for use; a video can be sent via WhatsApp. The dryer is no longer needed. It includes the feed screw, the blower unit, and the discharge screw, meaning it is complete. Gkedpfsztwhvjx Aivjc

Year of construction: 2016, condition: used, functionality: fully functional, machine/vehicle number: 36316, Carousel packaging and filling machine with three filling nozzles, designed for automated filling and sealing of cups. Gksdpfxjzua Nre Aivjc The machine ensures a complete process: - automatic cup feeding - filling using 3 filling nozzles - placing and heat-sealing of the lid film - automatic lid placement - discharge of the finished, sealed product The machine is equipped with a product transfer device with a CLAMP/DN32 connection. Suitable for food production and other operations using cup filling.

Condition: excellent (used), power: 397 kW (539.77 HP), fuel type: diesel, axle configuration: 8x2, fuel: diesel, brakes: engine braking, color: red, driver cabin: sleeper cab, gearing type: automatic, emission class: euro6, Equipment: ABS, AdBlue, EBS, central locking, cruise control, differential lock, electric window regulation, fog lights, navigation system, parking heater, power assisted steering, power mirror, spoiler, traction control, - Work lights, front - Heated mirrors - Brake booster - DAB radio - Differential lock - High beam headlights - Windshield - Low noise - Speed limiter Godpfx Aisz Ihavsvskc - Cabin - Leather interior - Leather upholstery - Alloy wheels - Air suspension - Air-suspended seats - Air horn - Media system - Rotating beacon - Rearview camera - Side skirts - Sun visor - Lane keeping assist - Auxiliary heater - Toolbox - Power take-off (PTO) Axle configuration Front axle 1: Steerable Front axle 2: Steerable Rear axle 1: Lift axle; Steerable Functionality Mast: Telescopic (13 sections) Mast length: 32 m Lifting capacity: 17,500 kg Crane manufacturer: PALFINGER PK 58.002 TEC F PJ 150 E Interior Upholstery: Leather Condition Technical condition: very good Optical condition: very good VOLVO FH 540 8X2 + PALFINGER PK 58.002 TEC F + JIB PJ150E DPS-C HEAVY-DUTY SEMI-TRACTOR TRUCK WITH LOADING CRANE – 3 STEERABLE AXLES – UP TO APPROX. 34 M HOOK HEIGHT A very complete and high-quality equipped Volvo FH 540 8x2 semi-tractor truck, year of manufacture 2022, equipped with a powerful Palfinger PK 58.002 TEC F loading crane in combination with a Palfinger PJ150E DPS-C JIB. The combination of main boom and JIB gives the crane a total of 13 hydraulic extensions, providing enormous reach and working height. The crane reaches a maximum lifting capacity of approximately 17,500 kg and a maximum hook height of approximately 34 meters. The Volvo FH chassis is designed as an 8x2 with 3 steerable axles, complete air suspension, Alcoa aluminum wheels, and a sliding fifth wheel coupling. The additional front outrigger allows the crane to be used in the area in front of the cab. This creates a particularly large working area around the vehicle. GENERAL DATA Manufacturer: Volvo Type: FH 540 Design: Semi-tractor truck / Crane truck Drive: 8x2 Year of manufacture: 2022 Mileage: approx. 290,790 km Engine power: 540 hp Suspension: Full air suspension Steering: 3 steerable axles Wheels: Alcoa aluminum wheels CHASSIS & SEMI-TRACTOR TRUCK - Heavy-duty Volvo FH 8x2 chassis - 3 steerable axles - Full air suspension - Alcoa aluminum wheels - Sliding fifth wheel coupling - Ideal for use as a semi-tractor truck - Various toolboxes behind the cab - Very maneuverable 8x2 configuration - Professional heavy-duty and crane design - Ideal for combining crane operations and semi-trailer transport PALFINGER PK 58.002 TEC F LOADING CRANE Mounted directly behind the cab: Manufacturer: Palfinger Type: PK 58.002 TEC F Design: Heavy-duty loading crane Max. lifting capacity: approx. 17,500 kg Operation: Remote control CRANE EQUIPMENT - Palfinger PK 58.002 TEC F - Palfinger PJ150E DPS-C JIB - Total of 13x hydraulically extendable - Maximum hook height approx. 34 meters - Maximum lifting capacity approx. 17,500 kg - Remote control - Additional oil cooler for crane hydraulics -...

Condition: used, This listing is for the CAS Biomat 2 Microbiological Safety Cabinet The unit is in full working condition and is ready for immediate use The BioMat 2 is a Class II microbiological safety cabinet also known as a biosafety cabinet designed to protect the user, the sample (or product), and the environment during handling of potentially hazardous or sterile biological materials Key Features & Capabilities Gkodexhfkbopfx Aivoc Protection & Compliance Meets the European standard EN 12469:2000 for microbiological safety cabinets It shields both the operator and the product through an inward air curtain (front sash) and sterile downflow over the work surface. Aerosols and contaminants are filtered through HEPA filters before being exhausted or recirculated Construction & Safety Built with a 1.5 mm mild steel outer shell and 304 stainless steel interior. Side panels are made from 5 mm UV-resistant toughened glass Include safety alarms, airflow monitoring, and robust sealing under negative pressure to prevent leaks

Year of construction: 2016, condition: used, This listing is for the 2016 Thermo Scientific MSC 1.2 Safety Cabinet Class 2. Gkjdpfjzgv Nrsx Aivec The unit is in full working condition and ready for immediate use. Designed for reliable microbiological safety, the Thermo Scientific MSC 1.2 delivers essential personnel, product, and environmental protection. Ideal for clinical and research labs, it offers high-efficiency HEPA filtration and a sloped front window for comfortable and secure handling of biological agents. Transparency Report and Technical Audit: Power-On Test: Verified; Control panel active, interior lighting operational, and airflow/fan system engaged.

Condition: new, functionality: fully functional, Year of construction: 2026, *All of our products are made with care and covered for 1 year warranty! *Installation and Operator Training FREE FABO produce Cement Silos from 50 to 2000 tons for stocking various tonnages of cement. Silos can be produced as welded or bolted according to your preference. For the continuation of production in a seamless way, FABO provide required units to get more than basic Cement Silo; level gauge, pressure relief valve and these kind of equipment. CEMENT SILO: Capacity: 50-2000 TONS (BOLTED) Silo Filters: 24,5 m2 surface area (WAM Brand) Silo Safety Valve : - (WAM Brand) Level Indicators 2 pcs/Silo, Brand: WAM, Model: ILTC220, Fludifier Nozzle : 3 pcs/silo, Brand:WAM, Model: U025 Mechanical Valve and Arm : (WAM Brand) Gjdpfswfckiox Aivskc Silo charging pipe : Ø 114 mm steel pipe. FOR FURTHER INFORMATION, PLEASE FEEL FREE TO CALL US!!!

Condition: ready for operation (used), Year of construction: 2015, travel distance X-axis: 3,000 mm, number of axes: 3, This 3-axis PHENIX TECHNOLOGIE MD-JET 2040 was manufactured in 2015. It features a working area of 3,000 × 1,500 mm and can cut materials up to 70 mm thick. The machine utilizes a Hypertherm HyPrecision 75S high-pressure pump with a maximum cutting pressure of 4,137 bar. If you are looking to get high-quality waterjet cutting capabilities, consider the PHENIX TECHNOLOGIE MD-JET 2040 waterjet cutting machine we have for sale. Contact us for further details. • Working area: 3,000 × 1,500 mm • Cutting process: Pure water and abrasive waterjet cutting • Suitable materials: Steel, stainless steel, aluminium, galvanized steel and other materials • Maximum cutting thickness: Up to 70 mm (material dependent) • Functional test: Possible before dismantlingMachine / Motion System • Cantilever design (loading from 3 sides) • Linear guideways with ball-bearing blocks • Ball-screw transmission • Brushless axis motors with incremental encoders • Automatic lubrication • Protected axes against abrasive contamination • Positioning accuracy: ±0.1 mm • Repeatability: ±0.05 mm • Stainless-steel water tank with adjustable overflow and quick-drain valve • Galvanized support grids • Safety light barriers and emergency stop systemCutting Head • AccuStream cutting head • Maximum working pressure: 4,000 bar (per MD JET manual) • Recommended nozzle diameter: 0.10–0.30 mm • Sapphire or diamond orifice • Hydraulic on/off valve • Configurations: Pure-water or abrasive-water cuttingHigh-Pressure Pump • Manufacturer/Model: Hypertherm HyPrecision 75S Godsz Hma Sepfx Aivskc • Pump power: 56 kW • Maximum/Factory cutting pressure: 4,137 bar • Factory piercing pressure: 1,379 bar • Maximum high-pressure water flow: 5.7 L/min at 50 Hz / 6.1 L/min at 60 Hz • Cutting-water inlet flow: 11.4 L/min • Cutting-water inlet pressure: 3–8 bar • Pump dimensions (L × W × H): 1,930 × 1,016 × 1,422 mm • Pump operating/shipping weight: 1,497 kg / 1,415 kg • Electrical supply: 400 V / 50 Hz • Rated current / Main circuit breaker: 103 A / 125 A • Hydraulic fluid tank capacity: 151 L • Hydraulic fluid: ISO VG 32 or 46 • Maximum hydraulic fluid temperature: 54.4 °C • Maximum hydraulic pressure: 217 bar Additional equipment • Pressurized abrasive system: • Abrasive hopper capacity: 200 L • Hopper pressure: 8 bar • Hopper dimensions: 1,070 × 780 × 1,320 mm (per MD JET manual) • Empty weight: 120 kg • Automatic abrasive feeding system with low-level monitoring • Pneumatic abrasive transport • Integrated abrasive metering/distribution system • Optional/available: Real-time cutting-height sensing system (as stated, availability optional)

Condition: used, This listing is for the CAS Biomat 2 Microbiological Safety Cabinet + Formalin Vaporiser The unit is in full working condition and is ready for immediate use The CAS Biomat 2 (manufactured by Contained Air Solutions) is a high-performance Class 2 Microbiological Safety Cabinet designed to provide a sterile environment for both the user and the sample. It is ideally suited for laboratories working with biological agents up to Biosafety Level 3. Key Features & Functionality: Triple Protection: Utilises a sophisticated airflow system (inflow and downflow) to protect the operator from airborne hazards, ensure product sterility via HEPA-filtered laminar air, and safeguard the environment by filtering exhaust air. Certified Safety: Fully compliant with BS EN 12469:2000 standards, ensuring it meets rigorous European safety requirements for biological workstations. Advanced Filtration: Equipped with high-efficiency H14 HEPA filters to create an ISO Class 5 clean environment. User-Friendly Control: Features an intuitive control panel for managing work area lighting, gas valves, and decontamination cycles. Integrated Decontamination: Includes built-in functionality for UV sterilisation and formalin fumigation, with some models featuring real-time status monitoring and VHP (Vaporised Hydrogen Peroxide) ports for thorough cleaning. Godpfx Aijyvhn Ijvskc Practical Design: Often includes internal electrical sockets for equipment like balances or stirrers, pipette holders, and energy-efficient LED lighting.

Condition: used, This listing is for the Dasit Biopharma Faster SafeFAST Classic 209D Microbiological safety cabinet The unit is in full working condition and is ready for immediate use Overview & Compliance Gksdpfxexhftce Aivjc Suitable for EN 12469:2000 (EU) and NSF/ANSI 49 (US) standard compliance, the SafeFAST Classic 209 D provides triple protection (user, product, environment) via Class II vertical laminar airflow containment  Airflow: ~70% is recirculated through an H14 HEPA/ULPA filter, ~30% is exhausted via a second H14 HEPA filter  Key Features Construction: Exterior in epoxy‑powder‑coated steel; rear wall meets EN12469 cleanability criteria; segmented work tray of AISI 304L stainless steel, removable for cleaning/autoclaving  Electrical safety sash: Motorised vertical sliding front sash, with standard working aperture of 200 mm (max 490 mm), also hinged for deep cleaning  Airflow & Filtration System: Single or dual centrifugal fans; static negative pressure design ensures all contaminated air is drawn into HEPA filters; avoids positive pressure in any chamber  Control & Safety Systems Microprocessor-based control (ECS™ or similar): Real-time monitoring via rear-lit LCD and touch keyboard, displaying airflow status, filter condition, fan status, and sash position; allows safe operation and data logging  Audio‑visual alarms: Alert the user in case of deviations in airflow velocity, sash mis-position, clogged filter, fan issues, or power loss