{"product_id":"vehicle-exhaust-emissions-lev","title":"Vehicle Exhaust Emissions \u0026 LEV","description":"\u003ch2 data-start=\"377\" data-end=\"431\"\u003eEngine-Matched Extraction Sizing Excel Calculator\u003c\/h2\u003e\n\u003ch3 data-start=\"432\" data-end=\"508\"\u003eA Practical Tool for Designing and Assessing Vehicle Exhaust LEV Systems\u003c\/h3\u003e\n\u003cp data-start=\"510\" data-end=\"874\"\u003eVehicle exhaust emissions are a significant occupational health hazard in garages, workshops, depots, MOT stations, and testing facilities. Petrol, diesel, LPG, and other internal combustion engines emit a complex mixture of \u003cstrong data-start=\"735\" data-end=\"777\"\u003etoxic gases and hazardous particulates\u003c\/strong\u003e, many of which are invisible yet capable of causing serious short- and long-term health effects.\u003c\/p\u003e\n\u003cp data-start=\"876\" data-end=\"1053\"\u003eEffective \u003cstrong data-start=\"886\" data-end=\"922\"\u003evehicle exhaust extraction (LEV)\u003c\/strong\u003e is therefore a critical engineering control — but only when it is \u003cstrong data-start=\"989\" data-end=\"1052\"\u003ecorrectly sized, correctly applied, and properly understood\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"1055\" data-end=\"1311\"\u003eThis Excel calculator was developed to support \u003cstrong data-start=\"1102\" data-end=\"1152\"\u003ereal-world LEV design and assessment decisions\u003c\/strong\u003e, helping practitioners match extraction capacity to \u003cstrong data-start=\"1205\" data-end=\"1245\"\u003eengine size and operating conditions\u003c\/strong\u003e, rather than relying on guesswork or over-simplified assumptions.\u003c\/p\u003e\n\u003chr data-start=\"1313\" data-end=\"1316\"\u003e\n\u003ch2 data-start=\"1318\" data-end=\"1373\"\u003eA Practical Sizing Tool Based on Recognised Guidance\u003c\/h2\u003e\n\u003cp data-start=\"1375\" data-end=\"1445\"\u003eThe calculator is based on principles and reference values drawn from:\u003c\/p\u003e\n\u003cul data-start=\"1447\" data-end=\"1658\"\u003e\n\u003cli data-start=\"1447\" data-end=\"1510\"\u003e\n\u003cp data-start=\"1449\" data-end=\"1510\"\u003e\u003cstrong data-start=\"1449\" data-end=\"1468\"\u003eEGEA Guidelines\u003c\/strong\u003e (European Garage Equipment Association)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1511\" data-end=\"1574\"\u003e\n\u003cp data-start=\"1513\" data-end=\"1574\"\u003e\u003cstrong data-start=\"1513\" data-end=\"1527\"\u003eHSE HSG187\u003c\/strong\u003e – Control of diesel engine exhaust emissions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1575\" data-end=\"1617\"\u003e\n\u003cp data-start=\"1577\" data-end=\"1617\"\u003e\u003cstrong data-start=\"1577\" data-end=\"1587\"\u003eHSG258\u003c\/strong\u003e – Local Exhaust Ventilation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1618\" data-end=\"1658\"\u003e\n\u003cp data-start=\"1620\" data-end=\"1658\"\u003eEstablished LEV engineering practice\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1660\" data-end=\"1750\"\u003eIt provides a structured way to estimate \u003cstrong data-start=\"1701\" data-end=\"1740\"\u003erequired exhaust extraction volumes\u003c\/strong\u003e based on:\u003c\/p\u003e\n\u003cul data-start=\"1752\" data-end=\"1910\"\u003e\n\u003cli data-start=\"1752\" data-end=\"1787\"\u003e\n\u003cp data-start=\"1754\" data-end=\"1787\"\u003eEngine size (litres \/ capacity)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1788\" data-end=\"1810\"\u003e\n\u003cp data-start=\"1790\" data-end=\"1810\"\u003eEngine speed (rpm)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1811\" data-end=\"1848\"\u003e\n\u003cp data-start=\"1813\" data-end=\"1848\"\u003eVehicle type (cars, vans, trucks)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1849\" data-end=\"1910\"\u003e\n\u003cp data-start=\"1851\" data-end=\"1910\"\u003eTypical operating scenarios (idling, testing, higher rpm)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1912\" data-end=\"2008\"\u003eThe aim is to help ensure systems are \u003cstrong data-start=\"1950\" data-end=\"2007\"\u003eneither under-extracting nor excessively over-powered\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr data-start=\"2010\" data-end=\"2013\"\u003e\n\u003ch2 data-start=\"2015\" data-end=\"2044\"\u003eWhy Correct Sizing Matters\u003c\/h2\u003e\n\u003cp data-start=\"2046\" data-end=\"2143\"\u003eMost guidance focuses on avoiding \u003cem data-start=\"2080\" data-end=\"2098\"\u003eunder-extraction\u003c\/em\u003e — but \u003cstrong data-start=\"2105\" data-end=\"2142\"\u003eover-extraction carries risks too\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"2145\" data-end=\"2311\"\u003eThis tool is designed to support \u003cstrong data-start=\"2178\" data-end=\"2197\"\u003ebalanced design\u003c\/strong\u003e, recognising that extraction systems must remove \u003cem data-start=\"2247\" data-end=\"2263\"\u003ewhat is needed\u003c\/em\u003e — no less, but also \u003cstrong data-start=\"2284\" data-end=\"2310\"\u003eno more than necessary\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3 data-start=\"2313\" data-end=\"2342\"\u003eRisks of Under-Extraction\u003c\/h3\u003e\n\u003cul data-start=\"2343\" data-end=\"2566\"\u003e\n\u003cli data-start=\"2343\" data-end=\"2403\"\u003e\n\u003cp data-start=\"2345\" data-end=\"2403\"\u003eExhaust gases and particulates escape into the workspace\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2404\" data-end=\"2472\"\u003e\n\u003cp data-start=\"2406\" data-end=\"2472\"\u003eIncreased exposure to CO, NOx, diesel particulate matter (DEEEs)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2473\" data-end=\"2527\"\u003e\n\u003cp data-start=\"2475\" data-end=\"2527\"\u003eFailure to adequately control exposure under COSHH\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2528\" data-end=\"2566\"\u003e\n\u003cp data-start=\"2530\" data-end=\"2566\"\u003eOdour, irritation, soot deposition\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"2568\" data-end=\"2596\"\u003eRisks of Over-Extraction\u003c\/h3\u003e\n\u003cul data-start=\"2597\" data-end=\"2908\"\u003e\n\u003cli data-start=\"2597\" data-end=\"2658\"\u003e\n\u003cp data-start=\"2599\" data-end=\"2658\"\u003eAltered exhaust back pressure, affecting engine behaviour\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2659\" data-end=\"2726\"\u003e\n\u003cp data-start=\"2661\" data-end=\"2726\"\u003ePoor performance of catalytic converters or particulate filters\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2727\" data-end=\"2801\"\u003e\n\u003cp data-start=\"2729\" data-end=\"2801\"\u003eExcessive cooling of exhaust systems (cold start issues, condensation)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2802\" data-end=\"2855\"\u003e\n\u003cp data-start=\"2804\" data-end=\"2855\"\u003eMechanical strain on exhaust components and hoses\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2856\" data-end=\"2908\"\u003e\n\u003cp data-start=\"2858\" data-end=\"2908\"\u003eIncreased energy use, noise, and operating costs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2910\" data-end=\"2981\"\u003eThis calculator helps practitioners understand and avoid both extremes.\u003c\/p\u003e\n\u003chr data-start=\"2983\" data-end=\"2986\"\u003e\n\u003ch2 data-start=\"2988\" data-end=\"3045\"\u003eDesigned for LEV Practitioners — Not Black-Box Outputs\u003c\/h2\u003e\n\u003cp data-start=\"3047\" data-end=\"3119\"\u003eThe calculator supports professional judgement rather than replacing it.\u003c\/p\u003e\n\u003cp data-start=\"3121\" data-end=\"3136\"\u003eIt helps users:\u003c\/p\u003e\n\u003cul data-start=\"3138\" data-end=\"3334\"\u003e\n\u003cli data-start=\"3138\" data-end=\"3188\"\u003e\n\u003cp data-start=\"3140\" data-end=\"3188\"\u003eEstimate appropriate extraction airflow (m³\/h)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3189\" data-end=\"3235\"\u003e\n\u003cp data-start=\"3191\" data-end=\"3235\"\u003eCompare system capacity with engine demand\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3236\" data-end=\"3273\"\u003e\n\u003cp data-start=\"3238\" data-end=\"3273\"\u003eSense-check installed LEV systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3274\" data-end=\"3334\"\u003e\n\u003cp data-start=\"3276\" data-end=\"3334\"\u003eSupport defensible design and Reg 9 assessment decisions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3336\" data-end=\"3377\"\u003eIt is particularly useful when reviewing:\u003c\/p\u003e\n\u003cul data-start=\"3379\" data-end=\"3560\"\u003e\n\u003cli data-start=\"3379\" data-end=\"3416\"\u003e\n\u003cp data-start=\"3381\" data-end=\"3416\"\u003eFixed tailpipe extraction systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3417\" data-end=\"3455\"\u003e\n\u003cp data-start=\"3419\" data-end=\"3455\"\u003eHose and clip-on scavenger systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3456\" data-end=\"3491\"\u003e\n\u003cp data-start=\"3458\" data-end=\"3491\"\u003eMulti-branch extraction systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3492\" data-end=\"3560\"\u003e\n\u003cp data-start=\"3494\" data-end=\"3560\"\u003eWorkshop bays where multiple vehicles may connect simultaneously\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3562\" data-end=\"3565\"\u003e\n\u003ch2 data-start=\"3567\" data-end=\"3608\"\u003eSupporting COSHH \u0026amp; LEV Assessment Work\u003c\/h2\u003e\n\u003cp data-start=\"3610\" data-end=\"3670\"\u003eThe calculator complements broader LEV duties by supporting:\u003c\/p\u003e\n\u003cul data-start=\"3672\" data-end=\"3891\"\u003e\n\u003cli data-start=\"3672\" data-end=\"3698\"\u003e\n\u003cp data-start=\"3674\" data-end=\"3698\"\u003eCOSHH risk assessments\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3699\" data-end=\"3738\"\u003e\n\u003cp data-start=\"3701\" data-end=\"3738\"\u003eLEV system design and specification\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3739\" data-end=\"3763\"\u003e\n\u003cp data-start=\"3741\" data-end=\"3763\"\u003eCommissioning checks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3764\" data-end=\"3823\"\u003e\n\u003cp data-start=\"3766\" data-end=\"3823\"\u003eCOSHH Regulation 9 Thorough Examination and Test (TExT)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3824\" data-end=\"3891\"\u003e\n\u003cp data-start=\"3826\" data-end=\"3891\"\u003eInvestigation of complaints, visible emissions, or odour issues\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3893\" data-end=\"4034\"\u003eIt aligns with the principle that \u003cstrong data-start=\"3927\" data-end=\"3975\"\u003eexhaust emissions must be captured at source\u003c\/strong\u003e, rather than relying on general ventilation or open doors.\u003c\/p\u003e\n\u003chr data-start=\"4036\" data-end=\"4039\"\u003e\n\u003ch2 data-start=\"4041\" data-end=\"4086\"\u003eImportant Professional Notes \u0026amp; Limitations\u003c\/h2\u003e\n\u003cp data-start=\"4088\" data-end=\"4154\"\u003eThis tool is provided as a \u003cstrong data-start=\"4115\" data-end=\"4153\"\u003ereference and calculation aid only\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cul data-start=\"4156\" data-end=\"4420\"\u003e\n\u003cli data-start=\"4156\" data-end=\"4205\"\u003e\n\u003cp data-start=\"4158\" data-end=\"4205\"\u003eEvery effort has been made to minimise errors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4206\" data-end=\"4266\"\u003e\n\u003cp data-start=\"4208\" data-end=\"4266\"\u003eNo guarantee is given that the spreadsheet is error-free\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4267\" data-end=\"4307\"\u003e\n\u003cp data-start=\"4269\" data-end=\"4307\"\u003eNo liability is accepted for its use\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4308\" data-end=\"4373\"\u003e\n\u003cp data-start=\"4310\" data-end=\"4373\"\u003eUsers must understand the assumptions behind the calculations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4374\" data-end=\"4420\"\u003e\n\u003cp data-start=\"4376\" data-end=\"4420\"\u003eResults must be sense-checked and verified\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4422\" data-end=\"4458\"\u003eThe calculator does \u003cstrong data-start=\"4442\" data-end=\"4449\"\u003enot\u003c\/strong\u003e replace:\u003c\/p\u003e\n\u003cul data-start=\"4460\" data-end=\"4587\"\u003e\n\u003cli data-start=\"4460\" data-end=\"4495\"\u003e\n\u003cp data-start=\"4462\" data-end=\"4495\"\u003eA site-specific risk assessment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4496\" data-end=\"4517\"\u003e\n\u003cp data-start=\"4498\" data-end=\"4517\"\u003eProper LEV design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4518\" data-end=\"4559\"\u003e\n\u003cp data-start=\"4520\" data-end=\"4559\"\u003eCommissioning and performance testing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4560\" data-end=\"4587\"\u003e\n\u003cp data-start=\"4562\" data-end=\"4587\"\u003eProfessional competence\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4589\" data-end=\"4592\"\u003e\n\u003ch2 data-start=\"4594\" data-end=\"4618\"\u003eWhy This Tool Matters\u003c\/h2\u003e\n\u003cp data-start=\"4620\" data-end=\"4678\"\u003eIncorrectly sized vehicle exhaust LEV systems can lead to:\u003c\/p\u003e\n\u003cul data-start=\"4680\" data-end=\"4871\"\u003e\n\u003cli data-start=\"4680\" data-end=\"4741\"\u003e\n\u003cp data-start=\"4682\" data-end=\"4741\"\u003eOngoing exposure to carcinogenic diesel exhaust emissions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4742\" data-end=\"4780\"\u003e\n\u003cp data-start=\"4744\" data-end=\"4780\"\u003ePoor confidence in LEV performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4781\" data-end=\"4822\"\u003e\n\u003cp data-start=\"4783\" data-end=\"4822\"\u003eConflicting test results year-on-year\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4823\" data-end=\"4871\"\u003e\n\u003cp data-start=\"4825\" data-end=\"4871\"\u003eEnforcement, compliance, or audit challenges\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4873\" data-end=\"5049\"\u003eThis calculator supports \u003cstrong data-start=\"4898\" data-end=\"4969\"\u003eclear thinking, transparent justification, and defensible decisions\u003c\/strong\u003e — whether you are designing, inspecting, or testing exhaust extraction systems.\u003c\/p\u003e\n\u003chr data-start=\"5051\" data-end=\"5054\"\u003e\n\u003ch2 data-start=\"5056\" data-end=\"5085\"\u003eWho This Calculator Is For\u003c\/h2\u003e\n\u003cp data-start=\"5087\" data-end=\"5119\"\u003eThis Excel tool is intended for:\u003c\/p\u003e\n\u003cul data-start=\"5121\" data-end=\"5315\"\u003e\n\u003cli data-start=\"5121\" data-end=\"5162\"\u003e\n\u003cp data-start=\"5123\" data-end=\"5162\"\u003eLEV engineers and COSHH Reg 9 testers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5163\" data-end=\"5190\"\u003e\n\u003cp data-start=\"5165\" data-end=\"5190\"\u003eOccupational hygienists\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5191\" data-end=\"5224\"\u003e\n\u003cp data-start=\"5193\" data-end=\"5224\"\u003eGarage and workshop designers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5225\" data-end=\"5258\"\u003e\n\u003cp data-start=\"5227\" data-end=\"5258\"\u003eHealth \u0026amp; safety professionals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5259\" data-end=\"5315\"\u003e\n\u003cp data-start=\"5261\" data-end=\"5315\"\u003eDuty holders responsible for vehicle exhaust control\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"5317\" data-end=\"5441\"\u003eIt is particularly relevant for those working in \u003cstrong data-start=\"5366\" data-end=\"5440\"\u003egarages, depots, MOT stations, fleet workshops, and testing facilities\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr data-start=\"5443\" data-end=\"5446\"\u003e\n\u003ch2 data-start=\"5448\" data-end=\"5466\"\u003eProduct Details\u003c\/h2\u003e\n\u003cul data-start=\"5468\" data-end=\"5813\"\u003e\n\u003cli data-start=\"5468\" data-end=\"5535\"\u003e\n\u003cp data-start=\"5470\" data-end=\"5535\"\u003e\u003cstrong data-start=\"5470\" data-end=\"5482\"\u003eProduct:\u003c\/strong\u003e Vehicle Exhaust Emissions \u0026amp; LEV – Excel Calculator and notes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5536\" data-end=\"5579\"\u003e\n\u003cp data-start=\"5538\" data-end=\"5579\"\u003e\u003cstrong data-start=\"5538\" data-end=\"5549\"\u003eFormat:\u003c\/strong\u003e Microsoft Excel spreadsheet and PDF notes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5580\" data-end=\"5635\"\u003e\n\u003cp data-start=\"5582\" data-end=\"5635\"\u003e\u003cstrong data-start=\"5582\" data-end=\"5592\"\u003eFocus:\u003c\/strong\u003e Engine-matched exhaust extraction sizing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5636\" data-end=\"5687\"\u003e\n\u003cp data-start=\"5638\" data-end=\"5687\"\u003e\u003cstrong data-start=\"5638\" data-end=\"5651\"\u003eBased On:\u003c\/strong\u003e EGEA guidance, HSE HSG187, HSG258\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5688\" data-end=\"5746\"\u003e\n\u003cp data-start=\"5690\" data-end=\"5746\"\u003e\u003cstrong data-start=\"5690\" data-end=\"5703\"\u003eUse Case:\u003c\/strong\u003e LEV design, assessment, and TExT support\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5747\" data-end=\"5781\"\u003e\n\u003cp data-start=\"5749\" data-end=\"5781\"\u003e\u003cstrong data-start=\"5749\" data-end=\"5760\"\u003eAuthor:\u003c\/strong\u003e Louise Davies Wood\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5782\" data-end=\"5813\"\u003e\n\u003cp data-start=\"5784\" data-end=\"5813\"\u003e\u003cstrong data-start=\"5784\" data-end=\"5796\"\u003eRelease:\u003c\/strong\u003e September 2025\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LEV Academy","offers":[{"title":"Default Title","offer_id":52700473098579,"sku":null,"price":25.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/3313\/8771\/files\/Screenshot2026-01-01212228_b3eb3ad1-5e47-4d5f-9fe2-7e4272aa6425.png?v=1767302774","url":"https:\/\/www.levacademy.co.uk\/products\/vehicle-exhaust-emissions-lev","provider":"LEV Academy","version":"1.0","type":"link"}