{
  "schema_version": 1,
  "updated": "2026-10-04",
  "scope": "Public source and modelling register for FH__VentLib",
  "disclaimer": "FH__VentLib is an independent project and is not affiliated with, endorsed by, or approved by Lindab. The models are planning aids, not manufacturer-certified product models. Dimensions, performance data, installation requirements and product availability must be verified against current official manufacturer documentation before ordering, fabrication, installation or compliance decisions.",
  "source_policy": "Manufacturer documents and images are not mirrored. Links below point to manufacturer-controlled or official retail sources. A missing document title, publication date or retrieval date is recorded as null rather than inferred.",
  "products": [
    {"id":"AIR_CIRCLE","product":"Air-Circle inline fan DN100","manufacturer":"Air-Circle","official_source":"https://www.bauhaus.info/kuechenventilatoren/air-circle-zwischenrohr-ventilator/p/23207127","source_title":"BAUHAUS product page","document_date":null,"retrieved":"2026-09-09","parameters_used":"DN100 planning envelope and connector placement","assumptions_and_deviations":"Planning representation derived from product-page evidence; not a manufacturer CAD model."},
    {"id":"SR","product":"SR circular duct","manufacturer":"Lindab","official_source":"https://itsolution.lindab.com/lindabwebproductsdoc/assets/production/ZmNhN2IzOTMtYTk5OS00YWJlLWEwODUtZTE4YTRmOTIzNTk5/5250440590913927190/SR_New.pdf?t=406783921","source_title":"SR technical sheet","document_date":null,"retrieved":null,"parameters_used":"Nominal diameter, length and connector datums","assumptions_and_deviations":"Parametric planning geometry; verify current sheet and availability."},
    {"id":"SRSS","product":"SRSS circular duct","manufacturer":"Lindab","official_source":"https://stlpimeuscprod.z1.web.core.windows.net/assets/OTBmMTg5OGEtMjJmZi00ZGViLTgyZDgtZDI4MjU0MDkzYjQw/5250859662859598653/SRSS.pdf","source_title":"SRSS technical sheet","document_date":null,"retrieved":"2026-08-07","parameters_used":"Nominal diameter, stock length and connector datums","assumptions_and_deviations":"Cut pieces are project instances of a stock source; verify cut and joining requirements."},
    {"id":"SRI","product":"SRI insulated circular duct","manufacturer":"Lindab","official_source":"https://itsolution.lindab.com/lindabwebproductsdoc/pdf/documentation/ads/lindab/technical/sri.pdf","source_title":"SRI technical sheet","document_date":null,"retrieved":"2026-09-02","parameters_used":"Nominal diameter, insulation envelope, length and connector datums","assumptions_and_deviations":"Simplified planning envelope; installation build-up must be verified."},
    {"id":"BUSS","product":"BUSS bend","manufacturer":"Lindab","official_source":"https://stlpimeuscprod.z1.web.core.windows.net/assets/OWIzNzc5YjQtZWFlNi00NDZhLTgwMWYtZGJkZjU1ZDMyYTZi/5250875242856200974/BUSS.pdf","source_title":"BUSS technical sheet","document_date":null,"retrieved":"2026-08-08","parameters_used":"Nominal diameter, angle and connector datums","assumptions_and_deviations":"Planning geometry; seam and fabrication details are simplified."},
    {"id":"BU","product":"BU bend","manufacturer":"Lindab","official_source":"https://itsolution.lindab.com/lindabwebproductsdoc/pdf/documentation/ads/lindab/technical/bu.pdf","source_title":"BU technical sheet","document_date":null,"retrieved":"2026-09-03","parameters_used":"Nominal diameter, angle and connector datums","assumptions_and_deviations":"Planning geometry; verify mounting instructions."},
    {"id":"TVU45","product":"TVU45 branch fitting","manufacturer":"Lindab","official_source":"https://stlpimeuscprod.z1.web.core.windows.net/assets/Y2U3YTRhZjQtMTZmMy00NDVhLTk2YTgtYTQ5ZWYxMWZiNzZl/5250524604467775270/TVU45-global.pdf","source_title":"TVU45 technical sheet","document_date":null,"retrieved":"2026-08-07","parameters_used":"Nominal diameters, 45-degree branch layout and connector datums","assumptions_and_deviations":"Planning geometry; fabrication details are simplified."},
    {"id":"TCPUSS","product":"TCPUSS branch fitting","manufacturer":"Lindab","official_source":"https://stlpimeuscprod.z1.web.core.windows.net/assets/ZjM5OTVhNGQtMzJjYy00ZTU0LWIwNWYtNzI2ZjU5YzgyYzAx/5250809527897706795/tcpussd-Datasheet-DE.pdf","source_title":"TCPUSS datasheet","document_date":null,"retrieved":"2026-08-07","parameters_used":"Nominal diameters and connector datums","assumptions_and_deviations":"Planning geometry; verify current dimensional combinations."},
    {"id":"XVU","product":"XVU double branch","manufacturer":"Lindab","official_source":"https://stlpimeuscprod.z1.web.core.windows.net/assets/ZjdjODI3YzgtY2I2Mi00ZDAxLWJlMmQtYmYyOTQ3ODgwMjJj/5249944668422732469/xvu45.pdf","source_title":"XVU45 technical sheet","document_date":null,"retrieved":"2026-08-08","parameters_used":"Nominal diameters, branch angle and connector datums","assumptions_and_deviations":"Planning geometry; fabrication details are simplified."},
    {"id":"YVU","product":"YVU branch fitting","manufacturer":"Lindab","official_source":"https://stlpimeuscprod.z1.web.core.windows.net/assets/YzlkYmQxMzItYTQwMC00MjcxLTg2YTEtODc2NDBhZjk4MmNm/5249944684409339452/yvu45.pdf","source_title":"YVU45 technical sheet","document_date":null,"retrieved":"2026-08-07","parameters_used":"Nominal diameters, branch layout and connector datums","assumptions_and_deviations":"Planning geometry; fabrication details are simplified."},
    {"id":"CBC_CBE","product":"CBC/CBE plenum box","manufacturer":"Lindab","official_source":"https://www.lindab.com/globalassets/commerce/lindabwebproductsdoc/assets/production/ztkzy2flzmytzjdizs00zge5ltk0ndetn2njyta3nmm1odm1/5249931926266871784/cbc-cbe_global.pdf?v=1697359289","source_title":"CBC/CBE technical sheet","document_date":null,"retrieved":"2026-08-08","parameters_used":"Nominal connection and planning envelope","assumptions_and_deviations":"Simplified box representation; verify product selection and installation clearances."},
    {"id":"RCLU","product":"RCLU reducer","manufacturer":"Lindab","official_source":"https://itsolution.lindab.com/lindabwebproductsdoc/pdf/documentation/ads/lindab/technical/rclu.pdf","source_title":"RCLU technical sheet","document_date":null,"retrieved":"2026-08-08","parameters_used":"End diameters, length and connector datums","assumptions_and_deviations":"Planning geometry; verify available size combinations."},
    {"id":"BSLU","product":"BSLU bend silencer","manufacturer":"Lindab","official_source":"https://stlpimeuscprod.z1.web.core.windows.net/assets/YjUwYTljOTctOTljOC00MTIyLWI4ZGMtYTk2NDBjYThlZDE5/5250207403715387616/BSLU.pdf","source_title":"BSLU technical sheet","document_date":null,"retrieved":"2026-08-28","parameters_used":"Nominal diameter, envelope and connector datums","assumptions_and_deviations":"Planning envelope only; acoustic performance is not certified by VentLib."},
    {"id":"BFUI","product":"BFUI insulated bend","manufacturer":"Lindab","official_source":"https://stlpimeuscprod.z1.web.core.windows.net/assets/YjlmMDk4Y2YtMmI0Yy00M2ZjLWFjYTQtYjg1MWYwZjhmNjQ5/5249680436952005134/BFUI.pdf","source_title":"BFUI technical sheet","document_date":null,"retrieved":"2026-08-30","parameters_used":"Nominal diameter, insulation envelope, angle and connector datums","assumptions_and_deviations":"Simplified planning geometry; verify current installation requirements."},
    {"id":"MFI","product":"MFI insulated female coupling","manufacturer":"Lindab","official_source":"https://stlpimeuscprod.z1.web.core.windows.net/assets/MzU1NDg4YWUtZmI0Mi00NzlhLTk0NzEtMDFhMzE2Nzk0YjI0/5249934514846467724/mfi.pdf","source_title":"MFI technical sheet","document_date":null,"retrieved":"2026-08-31","parameters_used":"Nominal diameter, length and insertion datums","assumptions_and_deviations":"Connection behavior is a planning model; verify assembly requirements."},
    {"id":"MF","product":"MF coupling","manufacturer":"Lindab","official_source":"https://www.lindab.de/globalassets/commerce/lindabwebproductsdoc/assets/production/mwm5mzbjztetngfkmy00yjlilwiwmzktmzi2zdfkzgi1ogyy/5249934484003958766/mf.pdf?v=1789262031","source_title":"MF technical sheet","document_date":null,"retrieved":"2026-09-15","parameters_used":"Nominal diameter, length and insertion datums","assumptions_and_deviations":"Planning representation; verify current product dimensions."},
    {"id":"DRATMFU","product":"DRATMFU access fitting","manufacturer":"Lindab","official_source":"https://www.lindab.de/globalassets/commerce/lindabwebproductsdoc/assets/production/owvhyzc4yjatowjkzc00zjc5lwe3njetzja5mguwzjhmmge5/5249896368636304897/dratmfu.pdf?v=1790473417","source_title":"DRATMFU technical sheet","document_date":null,"retrieved":null,"parameters_used":"Nominal diameter and planning envelope","assumptions_and_deviations":"Simplified planning representation; verify access and service clearance."},
    {"id":"WH25","product":"WH25 circular fire damper","manufacturer":"Lindab","official_source":"https://www.lindab.de/produkte/entrauchung-brandschutz/brandschutzklappen/runde-brandschutzklappen/wh25/","source_title":"WH25 product page","document_date":null,"retrieved":"2026-09-30","parameters_used":"Published nominal range, planning envelope, blade and connector datums","assumptions_and_deviations":"Planning aid only. Fire classification and installation conditions must be verified in current official documentation."},
    {"id":"NPU","product":"NPU nipple","manufacturer":"Lindab","official_source":"https://stlpimeuscprod.z1.web.core.windows.net/assets/Mjk4NmJlMjMtY2NiZi00OGM2LWIxZTMtZjU2NWYyOTg0MzIw/5250005233108366622/NPU.pdf","source_title":"NPU technical sheet","document_date":null,"retrieved":"2026-09-01","parameters_used":"Nominal diameter, length and insertion datums","assumptions_and_deviations":"Planning representation; verify joining requirements."},
    {"id":"VR","product":"VR external-wall grille","manufacturer":"Lindab","official_source":"https://stlpimeuscprod.z1.web.core.windows.net/assets/YmU2NzAzMjQtZmRkZS00ZTMyLWEyOTUtY2VjYTk0MWJiMzA4/5250049477505777419/VR_GLOBAL.pdf","source_title":"VR technical sheet","document_date":null,"retrieved":"2026-09-07","parameters_used":"Nominal diameter and planning envelope","assumptions_and_deviations":"Simplified grille geometry; verify weather, airflow and installation requirements."},
    {"id":"NPUI","product":"NPUI insulated-duct nipple","manufacturer":"Lindab","official_source":"https://stlpimeuscprod.z1.web.core.windows.net/assets/ZjdjOTA1MmEtZTAwMi00OTQ0LWJkMjktOGVlM2MxYTczZDZj/5249935297005404256/npui.pdf","source_title":"NPUI technical sheet","document_date":null,"retrieved":"2026-09-07","parameters_used":"Nominal diameter, insulation interface and insertion datums","assumptions_and_deviations":"Planning representation; verify joining and insulation requirements."},
    {"id":"SLU","product":"SLU straight silencer","manufacturer":"Lindab","official_source":"https://stlpimeuscprod.z1.web.core.windows.net/assets/NzkxMTg3Y2EtN2RiYy00MDJiLThiMjgtMmNhM2I2ZjFkZmU3/5250550392175321251/SLU.pdf","source_title":"SLU technical sheet","document_date":null,"retrieved":"2026-08-30","parameters_used":"Nominal diameter, envelope and connector datums","assumptions_and_deviations":"Planning envelope only; acoustic performance is not certified by VentLib."}
  ]
}