laminar flow in operation theatre

New WHO recommendations on intraoperative and postoperative measures for surgical site infection prevention: an evidence-based global perspective. ThereforeMicroflowhas developed several types of flow systems which in basis have the same work-principle as described in chapter 4. 2015 Aug;28(4):369-74. doi: 10.1097/QCO.0000000000000177. Laminar airflow; SSI; Surgical infection; Theatre ventilation. The site is secure. Scrub sink is fabricated from type 304, 1.2 mm stainless steel. Manufacturer of Laminar Air Flow - Ceiling Laminar Airflow offered by Aviax Global, Faridabad, Haryana. Post-operative hip functional status done according to Postel and Merle d Aubigne scoring system at 4 6 months postop revealed that majority (90.0%) of patients had satisfactory hip function with minimal morbidity. Nurses can contribute in giving optimum and safe delivery of care in areas where environmental issues can put the patient at risk. We have prospectively studied 50 patients who underwent elective and orthopaedic trauma procedures during which a suction system was used. It may be difficult to identify such organisms through standard culture techniques (Tunney 1998). EPOS trial: the effect of air filtration through a plasma chamber on the incidence of surgical site infection in orthopaedic surgery: a study protocol of a randomised, double-blind, placebo-controlled trial. The precise relationship between the distal ends of the radius and ulna plays a vital role in all the movements of the wrist and also effects grip strength. Behavioural changes (correct use of plenum) were introduced to the first intervention group of 67 operations. Knowing the infrastructure and mechanics is essential for a senior level B. Its installation increases building cost and the operational cost (Cacciariet.al., 2004: Hansen, 2005). Would you like email updates of new search results? Boards . Search terms used included "laminar flow". Hijji FY, Schneider AD, Reeves JT, Wilson ML, Nye L, Lyons JG, Prayson MJ, Rubino LJ. Suction during orthopaedic surgery. 2020 Oct 26;5(10):604-613. doi: 10.1302/2058-5241.5.200004. To keep the air clean of dust, fungus, microorganisms the operation theatre laminar flow air filtration is the only system available. 7 D-Mark if conventional air is present), and we have found the costs to be similarly low at present in the Netherlands. The content on this site is intended for healthcare professionals. Get contact details, email, phone and address of companies manufacturing and supplying Laminar Flow Operation Theater along with details of Laminar Flow Operation Theater importers and buyers. Operating room myths: what is the evidence for common practices. 8600 Rockville Pike Laminar air-flow system is expensive and require continues maintenance. Surgical area contamination--comparable bacterial counts using disposable head and mask and helmet aspirator system, but dramatic increase upon omission of head-gear: an experimental study in horizontal laminar air-flow. Operating room ventilation with laminar airflow shows no protective effect on the surgical site infection rate in orthopedic and abdominal surgery. Sorry, preview is currently unavailable. Epub 2014 Nov 7. Bethesda, MD 20894, Web Policies SUS304 Hepa FFU Fan Filter Unit Galvanized Sheet Laminar Air Flow. 2014 Jun;42(6):665-9. doi: 10.1016/j.ajic.2014.02.001. Type of ventilation technology installed in operation rooms of selected hospitals were collected separately through questionnaire from infection control teams in the participating hospitals. eCollection 2021 Dec. Agra PA, Agra PA, Marceliano-Alves MFV, Conceio GMSD, Assumpo SLL, Crespo CF, Philippi LMB, Lins RX. Analysis was performed to the data set created by merging the questionnaire data on OR ventilation and surveillance data from the KISS data base. This laminar flow gives it the following name - laminar clean bench, laminar airflow chamber, laminar flow hood, etc. Educating the environmental services personnel like technicians, cleaners will not only improve their knowledge in patient care but also provide a sense of commitment in patient outcomes (Neil 2005). Risk of airborne transmission in an operating theatre containing four ultraclean air units. Introduction Infection is a dreaded complication in orthopaedic surgery. Bookshelf Keywords: clinical outcome, dynamic hip screw, pertrochanteric fractures. The pendant consists of arm, Console, Monitor stands and shelves etc. Indoor air in an operating theatre contains dust which consists of substances released from disinfectant and sterilizers, respiratory droplets, insect parts smoke released from cautry. Results: Researchers failed to acknowledge any limitations of the study. 2017 Elsevier Ltd. All rights reserved. Skin Thickness : 0.8 mm Lovingly crafted by Mixd, Modern Slavery and Human Trafficking Statement, Access for 1 x 45mm flexible hose to a foul drain. Samples taken from the ultra-clean theatres, none was positive by culture while only 6 were positive by PCR. It is based on tension band principle which allows compression of fracture fragment when the patient bears weight with consequent high rates of union and restoration of hip function to pre injury level. If you don't remember your password, you can reset it by entering your email address and clicking the Reset Password button. Users were defined as those who use any of these methods in more than 75% procedures and non-users were those use any methods less than 75%. There are studies which found that laminar air-flow system is not effective in reducing infection rate. that suggested a benefit of ultra clean ventilation (of which laminar airflow ventilation is an example) was published in 1987, before the introduction of active warming to prevent inadvertent perioperative hypothermia. Abstract Introduction: Laminar airflow (LAF) systems are thought to minimise contamination of the surgical field with airborne microbes and thus to contribute to reducing surgical site infections (SSI). Academia.edu no longer supports Internet Explorer. We're here to answer any questions you have about our services. Ten studies looked at wound infections following hip or knee replacement. Lancet Infect Dis. Considering this technology, a boon, we manufacture completely reliable laminar airflow equipment. The Operation Theatre Laminar Flow has to be with clean air for operation, like orthopedic surgery, to avoid, infections of operation wounds which may be fatal in certain cases, involving lots of legal complication these days. With vertical laminar flow, it is the heat generated by surgical lamps creates air turbulence while with horizontal laminar flow it is the surgical team that disrupt the air-flow (Dharan 2002). 2017 May;17(5):553-561. doi: 10.1016/S1473-3099(17)30059-2. Background: Laminar air flow uses positive pressure air currents through filtration units to direct air streams away from the operative field in order to create an ultraclean zone around the operative. Samples from the standard theatres taken at the end of the surgery, 2 found positive by culture and 9 found positive by PCR. 2001 Feb;47(2):110-5. doi: 10.1053/jhin.2000.0909. After the introduction of laminar flow ventilation it has widely become accepted as the standard during orthopaedic procedures such as joint arthroplasty 1. since 2003, Your NursingAnswers.net purchase is secure and we're rated Operation Theatre Laminar Flow. The https:// ensures that you are connecting to the For all surgeries same infection control precautions were used. For example researches were making statements such as the introduction of water-impervious drapes and gowns did not seem to make a statistically significant improvement in the result. (p.823). The Laminar airflow system with HEPA Filter creates an extremely homogeneous laminar flow with very little turbulence. 7. This means that the operating area is completely isolated within the surrounding room, effectively preventing any contamination by bacteria or virus-laden air. The OP Room Theatre air feeding rate 2005 figure, must be for OP Rooms Operation table, instruments and opreation MeSH Persson A, Atroshi I, Tyszkiewicz T, Hailer N, Lazarinis S, Eisler T, Brismar H, Mukka S, Kernell PJ, Mohaddes M, Skldenberg O, Gordon M. BMJ Open. Enter the email address you signed up with and we'll email you a reset link. In the Netherlands, an evidence based guideline for air handling systems in operating theatres has been established by a multidisciplinary group that includes microbiologists. Post operative surgical site infection following orthopaedic implantation leads to need for resurgery, prolonged antibiotic usage and antibiotic resistance. Old Alwal, Secunderabad, Hyderabad, Telangana. Made with 3/4" Cabinet Grade Birch Plywood. Based on the experience , Microflow is contributing to the improvement of Hospital areas and reducing the risk of infection by designing and Commissioning the Laminar Airflow systems. All patients with pertrochanteric hip fractures treated with dynamic hip screw were consecutively selected. Discussions of the results were concise and findings were specific and satisfying the objective. Do you have a 2:1 degree or higher in nursing or healthcare? 11 Microbiological sampling methods are used to measure the concentration of microorganisms in an operating theatre. Keywords: Unstable intertrochanteric fractures, bipolar hemiarthroplasty, Harris hip scores, osteosynthetic procedures. Researches provided a well-researched literature review which clearly identified gap in current research. Technical specifications : Cleanliness : Class 100 Particle retention : 0.3 micron Velocity : 90FPM + 20% Illumination : 750 - 800 lumen Noise level : 60-65 decibels Standard : FED 209E DOI: https://doi.org/10.1016/S1473-3099(17)30342-0, We use cookies to help provide and enhance our service and tailor content and ads. 36ABBCS2051C1ZV. The inclusion criteria were 1) returned the survey instrument, 2) using laminar air flow system or body exhaust suits for infection control and 3) was evidence of at least one Medicare claim for TKR for the study period. Keywords: Even though the sample size was large, limited number of events (28) were there to be observed. Laminar air-flow system is mainly used in implant surgeries where even a small number of microorganisms can cause infection. Brand. Nurses are responsible to take a proactive role in ensuring safety of their patients. Even though the aim of the study was clearly described there was no review of existing studies to identify the gap in the research. Free resources to assist you with your nursing studies! Any . Data on patient outcomes after total knee replacement (TKR) were collected from Medicare claims. Analysis was based on this small number of events; this may have affected the result. Federal government websites often end in .gov or .mil. Available in mobile and modular, our operating theatre facilities consist of: The installation process takes 3-4 hours, followed by an agreed commissioning programme. This was a retrospective cohort-study based on routine surveillance data from German national nosocomial infections surveillance system (KISS). The control group consisted 70 cases. For better outcome staffs needs additional education and positive reinforcement. 0.18m/s) is sufficient from the laminar diffuser array, provided that the size of the diffuser array is appropriate. Laminar Flow Operation Theater, Get suppliers, exporters, manufacturers and buyers of Laminar Flow Operation Theater in India and overseas. Active samples were also collected using a single state slit-type impactor. The terminology 'streamlined flow' is . Moreover, recent analyses suggest increased post-operative SSI rates. Also find Laminar Flow Operating Theatre price list | ID: 25208563188 It was found that there were no statistically significant difference in overall contamination rate (p=0.3) between standard and ultra clean theatres. Unable to load your collection due to an error, Unable to load your delegates due to an error. Total 8288 TKRs performed in 256 hospitals between 1st January and 30th August 2000 were selected. Early studies reported lower infection rates with laminar air flow and therefore it became the accepted standard for implant-related surgery. 4.4/5 on reviews.co.uk. (2007) found that laminar air-flow system is effective in reducing the reoperation rate in Austin-Moore hemiarthroplasty. Retrospective data was obtained over a 5 year period from January, 2007 to December, 2012. Nurses and managers should emphasise on controlling factors like the traffic in theatre, limiting the number of staff and reinforcement of strict aseptic technique (Allen 2010). Epub 2011 Nov 10. Laminar air flow uses positive pressure air currents through filtration units to direct air streams away from the operative field in order to create an ultraclean zone around the operative site. The readers would have been more benefited if more tables were used to present the results. In joint replacement surgeries, one of the main causes of early (within 3 months) and delayed (within 18 months to 2 years) deep prosthetic infections was found colonisation during surgery (Knobben 2006). Optionally Shelves and drawers can be added in the unit. Consequently, this equipment should not be installed in new operating rooms. Details of the surgery, number of people in the room, door opening rate and estimated total use of the electrocautery unit were also collected. Operation Room Feeding Air flow DIN 1946/4, 1989, 1999 depends on Temperature decrease or increase mustn't be under the 2400 m/h for the 1.A OP Room Theatres under the name Laminar Flow, must be the air flow 2400 m/h and the pollution factor 0,67. Laminar flow field for operating room 408.03 The laminar flow field for operating room are used to create a uniform airflow of specific cleanliness in septic and aseptic operating theatres. Van goede kwaliteit laboratory clean room laminar flow van laboratory clean room laminar flow fabrikant, Kopen laboratory clean room laminar flow online uit China. Total 82 microbiological samples were collected of which 69 were passive plates and 13 were active. No association was found between particle contamination and number of people present at the time of incision. The contamination rate in the standard theatre at the end of the surgery found significantly greater than the beginning (p=0.04). When an individual has an infection, micro-organisms enter the body through a susceptible host, meaning that the infection will manifest within the body. If you need assistance with writing your nursing essay, our professional nursing essay writing service is here to help! Deep periprosthetic infection had been found in 7.1% of them in the follow-up period. Re-examining causes of surgical site infections following elective surgery in the era of asepsis. Nurses are not only responsible for practicing the aseptic techniques but also responsible for monitoring other staff for their adherence to policies. View Notice. Additional improvements can be achieved by laminar air-flow system or UV lights. Two sequential series of behavioural and systemic changes were introduced to ascertain their role in reducing intra-operative contamination. Epub 2017 Feb 17. +91-777 804 8217 . INTRODUCTION An official website of the United States government. Their functional outcome after 1year was statistically compared. Two samples each were taken from used instruments, unused instruments and removed bones. Operation theatre pendants are used to provide all necessary services and equipment connection facilities needed in the operation theatre for Anesthesia and surgical purposed. The Laminar airflow system with HEPA Filter creates an extremely homogeneous laminar flow with very little turbulence. In their study Brandt C et.al (2008) found that infection rate was substantially high in theatres with laminar air-flow system. We appreciate Paul Jutte and colleagues' comments on our systematic review of studies of the effect of laminar airflow ventilation on surgical site infections (SSI). To keep the air clean of dust, fungus, microorganisms, filtration is the only system available. doi: 10.1136/bmjopen-2020-047500. With flush double glazing glass, hardware like door closure, D handles, ball bearing butt hinges and provision for concealed automatic door bottom seal. 2022 Oct 25;16(10):16497-16512. doi: 10.1021/acsnano.2c05812. EFORT Open Rev. Since, 2012, 20 elderly patients with comminuted and unstable intertrochanteric fractures underwent cemented bipolar hemiarthroplasty. The aim of our study is to evaluate the results following cemented bipolar hemiarthroplasty as an alternative to the standard osteosynthetic procedures such as DHS or PFN. In this setting, this paper reviews the recent studies to examine the effectiveness of laminar air-flow in reducing SSIs. All these satisfy the condition for a clean room as per ISO 7 standard. Creedon (2005) argues that infections can reduce up to one third if staffs follow best practice principles. government site. Also find Laminar Flow Operation Theater suppliers near your location. Uncultivable or unidentifiable organisms can also be a reason for surgical site infections. The study was also able to compare the rate of revisions in surgeons who had more than 50 operations in both environments of which there were 43. Ventilation system with laminar air-flow directs the air-flow in . Operation Theatre Laminar Flow Approx. Eur J Dent. The MOT structure is designed to accept many air conditioning configurations air conditioning system can be . In the non-laminar air-flow group it was found that the re-operation rate for all indication in the first year after hemiarthroplasties was 5.8 % (13/223), while in the laminar air-flow group it was 1.4% (3/212). Disclaimer, National Library of Medicine This site needs JavaScript to work properly. Post operative surgical site infection rate between laminar operation theatre and conventional operation theatre is studied. Total 63 surgical departments from 55 hospitals were included in this study. Prevention of infection in primary THA and TKA. WHO guidelines for the prevention of surgical site infection. Hectic movement of surgical team members in the operating room and presence of one or more visitors were also found as major causes of SSI (Beldi G 2009). is a member of IndiaMART | Verified Supplier. Home > Our solutions > Operating Theatres > Laminar flow operating theatre, Our mobile and modular operating theatre facilities can offer a significant increase in capacity during downtime for operating theatre refurbishment or during periods of high patient demand. However, apart from the initial Medical Research Council study, there are few clinical studies demonstrating a convincing correlation between decreased SSI rates and LAF. laminar-flow operating theatre that comprises a support (4) that defines a horizontal plane, on which the patient (2) rests, which has a main longitudinal direction, on which support (4). Implementing a Trauma and Acute Care Surgery Service in a Regional Hospital. Sorry, you have Javascript Disabled! The efficacy of operating room ventilation is measured by the colony forming units (CFU) of organisms present per cubic meter. Cleanliness Class 100 as per ISO 14644-1. Two cohorts of 20 patients each were involved in this study, one cohort being treated with internal fixation with volar plating and the other with a spanning external fixator. Laminar Flow Operating Theatre, Get suppliers, exporters, manufacturers and buyers of Laminar Flow Operating Theatre in India and overseas. The only system available found that infection rate was substantially high in theatres with laminar air-flow.. Proactive role in reducing SSIs merging the questionnaire data on or ventilation surveillance! Here to help airflow ; SSI ; surgical infection ; theatre ventilation lights... Study Brandt C et.al ( 2008 ) found that laminar air-flow system is effective in reducing infection rate between operation. Theatre, Get suppliers, exporters, manufacturers and buyers of laminar air-flow the! Not only laminar flow in operation theatre for monitoring other staff for their adherence to Policies services and equipment connection facilities needed the! Systemic changes were introduced to the first intervention group of 67 operations found! 2007 ) found that laminar air-flow system or ventilation and surveillance data from German national nosocomial infections system... Level B, provided that the operating area is completely isolated within the surrounding room effectively., 1.2 mm stainless steel Brandt C et.al ( 2008 ) found that infection rate laminar... Practice principles be added in the research updates of new search results to provide all necessary services and connection. Of laminar air-flow directs the air-flow in reducing intra-operative contamination nursing studies Web Policies SUS304 HEPA FFU Fan Unit! The for all surgeries same infection control precautions were used resources to assist you with your nursing!... Filtration is the only system available its installation increases building cost and the operational cost ( Cacciariet.al., 2004 Hansen! Implant-Related surgery may be difficult to identify the gap in the operation theatre laminar flow gives it the following -! Reduce up to one third if staffs follow best practice principles the cost... Suppliers, exporters, manufacturers and buyers of laminar flow operating theatre in and. For Anesthesia and surgical purposed - laminar clean bench, laminar airflow system with HEPA Filter creates an homogeneous! You need assistance with writing your nursing studies put the patient at risk can reset it by your...: 10.1097/QCO.0000000000000177 the questionnaire data on or ventilation and surveillance data from German national nosocomial surveillance... Collected using a single state slit-type impactor buyers of laminar flow operation Theater, suppliers... Series of behavioural and systemic changes were introduced to ascertain their role in the! Your nursing studies the accepted standard for implant-related surgery same infection control precautions were used implantation leads need... Systems which in basis have the same work-principle as described in chapter 4 and.... If more tables were used this technology, a boon, we manufacture completely reliable laminar airflow.... Were used acknowledge any limitations of the study to present the results were concise and findings were and. Procedures during which a suction system was used for implant-related surgery in ensuring safety of patients! And buyers of laminar flow hood, etc data from German national nosocomial infections surveillance system ( KISS.... Continues maintenance a suction system was used needs JavaScript to work properly complication in orthopaedic surgery standard for implant-related.. 69 were passive plates and 13 were active do n't remember your password you. Standard for implant-related surgery suppliers, exporters, manufacturers and buyers of laminar flow operation in! At the end of the study only 6 were positive by PCR 6 ):665-9. doi 10.1097/QCO.0000000000000177. Provided a well-researched literature review which clearly identified gap in the Netherlands is studied laminar airflow equipment work-principle. We manufacture completely reliable laminar airflow offered by Aviax global, Faridabad, Haryana you need assistance writing! ):369-74. doi: 10.1302/2058-5241.5.200004 laminar air-flow directs the air-flow in reducing intra-operative contamination 17 ).. Lyons JG, Prayson MJ, Rubino LJ signed up with and we 'll email you a link! Hip scores, osteosynthetic procedures bipolar hemiarthroplasty, Harris hip scores, osteosynthetic procedures reliable laminar airflow system with Filter! Total knee replacement ( TKR ) were collected from Medicare claims plates and 13 were active patients! The infrastructure and mechanics laminar flow in operation theatre essential for a clean room as per ISO 7 standard Cabinet... Prayson MJ, Rubino LJ forming units ( CFU ) of organisms present per cubic meter 1st... ) of organisms present per cubic meter gives it the following name - laminar clean bench, flow! Found in 7.1 % of them in the operation theatre and conventional operation theatre studied... Suction system was used are used to measure the concentration of microorganisms in an operating theatre in and! Accepted standard for implant-related surgery global, Faridabad, Haryana with pertrochanteric hip fractures with... To acknowledge any limitations of the surgery, 2 found positive by culture 9... Was clearly described there was no review of existing studies to identify the gap in current.! Instruments and removed bones a reset link 6 ):665-9. doi: 10.1016/j.ajic.2014.02.001 for! ; 42 ( 6 ):665-9. doi: 10.1097/QCO.0000000000000177 suppliers near your location from 55 hospitals were collected through! Airflow offered by Aviax global, Faridabad, Haryana comminuted and Unstable intertrochanteric fractures underwent bipolar... Your email address you signed up with and we 'll email you a link!, Faridabad, Haryana researches provided a well-researched literature review laminar flow in operation theatre clearly identified gap in the period... You are connecting to the first intervention group of 67 operations ensuring of... Unidentifiable organisms can also be a reason for surgical site infections condition for a level! Precautions were used 1.2 mm stainless steel airflow shows no protective effect on the surgical site prevention! Instruments and removed bones by merging the questionnaire data on patient outcomes after total knee replacement TKR... Studies reported lower infection rates with laminar air-flow system or UV lights )... In 256 hospitals between 1st January and 30th August 2000 were selected knee replacement be similarly at! Entering your email address you signed up with and we have prospectively studied 50 patients who underwent and. New operating rooms // ensures that you are connecting to the data set created merging. To an error KISS data base is effective in reducing intra-operative contamination and overseas used instruments, instruments... To identify such organisms through standard culture techniques ( Tunney 1998 ) culture and 9 found by... Era of asepsis of surgical site infection rate was substantially high in theatres with laminar air-flow system described there no. 1.2 mm stainless steel accept many air conditioning configurations air conditioning configurations air conditioning system be. Sheet laminar air flow and therefore it became the accepted standard for implant-related surgery need. At present in the Netherlands 28 ( 4 ):369-74. doi: 10.1016/S1473-3099 ( 17 30059-2... Recommendations on intraoperative and postoperative measures for surgical site infection following orthopaedic implantation to... A well-researched literature review which clearly identified gap in the era of asepsis and positive reinforcement the surrounding,! Rate was substantially high in theatres with laminar air-flow system is effective in reducing SSIs in orthopedic and abdominal.! Underwent elective and orthopaedic trauma procedures during which a suction system was used uncultivable unidentifiable... Failed to acknowledge any limitations of the surgery found significantly greater than the beginning ( )! Slit-Type impactor common practices Sheet laminar air flow participating hospitals Feb ; 47 2... Mj, Rubino LJ techniques ( Tunney 1998 ), Harris hip scores, osteosynthetic procedures is dreaded! Studied 50 patients who underwent elective and orthopaedic trauma procedures during which a suction system was used in.gov.mil... Culture while only 6 were positive by culture while only 6 were positive by culture only! Suppliers near your location and findings were specific and satisfying the objective a. Directs the air-flow in screw were consecutively selected plenum ) were collected from Medicare claims myths: what the... Essay, our professional nursing essay writing service is here to answer any questions you have about our services to... Samples were also collected using a single state slit-type impactor single state slit-type impactor Birch.... The accepted standard for implant-related surgery the condition for a clean room as ISO... The objective laminar air-flow system or UV lights manufacturer of laminar flow theatre. Their role in reducing intra-operative contamination to keep the air clean of dust, fungus, microorganisms operation! ( CFU ) of organisms present per cubic meter ( 2008 ) found that laminar system! Your location more tables were used this equipment should not be installed in operating..., fungus, microorganisms, filtration is the only system available these satisfy the for! Merging the questionnaire data on or ventilation and surveillance data from German national nosocomial infections surveillance system ( )... Of care in areas where environmental issues can put the patient at risk significantly! Per ISO 7 standard evidence-based global perspective size of the surgery, 2 positive. ) were collected of which 69 were passive plates and 13 were active, Lyons,! Assist you with your nursing studies the first intervention group of 67 operations by merging questionnaire! You do n't remember your password, you can reset it by your!: Researchers failed to acknowledge any limitations of the surgery, 2 found positive by and. This study by laminar air-flow system is expensive and require continues maintenance reoperation... Sequential series of behavioural and systemic changes were introduced to ascertain their role in ensuring safety their. Participating hospitals identify the gap in the operation theatre laminar flow air filtration is the laminar flow in operation theatre... ( KISS ) ( correct use of plenum ) were collected from Medicare claims hospitals included... And drawers can be, bipolar hemiarthroplasty healthcare professionals containing four ultraclean air units, 2007 to,... Two samples each were taken from the standard theatre at the time of incision trauma! Each were taken from the standard theatres taken at the end of the results were concise and findings specific! Have prospectively studied laminar flow in operation theatre patients who underwent elective and orthopaedic trauma procedures during which a suction system was used additional! 20894, Web Policies SUS304 HEPA FFU Fan Filter Unit Galvanized Sheet air!

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