{
  "opening": "Yes. Prusa tells you to print ABS and ASA in a well-ventilated room because both release fumes, and both articles name styrene. A 2016 chamber study measured styrene from ABS and HIPS at about 10 to 110 micrograms per minute, and it says to be careful in a poorly ventilated small office or without combined gas and particle filtration.",
  "question": "Are ABS/ASA fumes dangerous, and do I need ventilation?",
  "slug": "abs_fumes",
  "useCase": "abs",
  "useCaseLabel": "ABS",
  "updated": "2026-10-19",
  "shortAnswer": "Yes. Prusa tells you to print ABS and ASA in a well-ventilated room because both release fumes, and both articles name styrene. A 2016 chamber study measured styrene from ABS and HIPS at about 10 to 110 micrograms per minute, and it says to be careful in a poorly ventilated small office or without combined gas and particle filtration.",
  "recommendedMaterials": [
    "abs",
    "asa"
  ],
  "printerConsiderations": [
    "Prusa says ventilate the room and do not put a draft on the print. An enclosure without a vent is the conflict those two sentences create. Their enclosure note is about warping, not about a filter certificate.",
    "Azimi and coauthors, Environmental Science & Technology, 2016, say the screening result is caution in poorly ventilated spaces or without combined gas and particle filtration. The paper does not say a hobby HEPA-plus-carbon box makes the room safe.",
    "A score-20 comment on r/prusa3d 108oby3 says an Ikea monitor that only reads PM2.5 will not show VOCs. That matches the study's split between particles and gases. It is not itself a measurement."
  ],
  "pros": [
    "Styrene is named by Prusa for both ABS and ASA, and it is quantified for ABS and HIPS in the 2016 paper.",
    "The same paper gives a PLA comparison, lactide at about 4 to 5 micrograms per minute, so the lower PLA number has a source."
  ],
  "cons": [
    "No ABS or ASA safety data sheet was retrieved for this page. The fume lines cited here are Prusa's material articles and the Azimi abstract.",
    "The study's UFP range is about 10^8 to 10^11 particles per minute across filaments. It is not an ABS-only number, and it is not a room concentration."
  ],
  "community": "r/prusa3d 108oby3 is a bedroom PLA setup with an Ikea purifier. The score-20 comment says that monitor detects PM2.5 and will not detect VOCs, and that higher-temperature thermoplastics should be filtered. r/BambuLab 1vj3wsm is about ABS and ASA fumes. The score-3 comment says that person exhausts the enclosure outside, and that no smell is not the same as safe. The score-2 comment describes a 7 kW fan rated 60 m3/h on a cupboard. Those figures are the commenter's setup. r/3Dprinting 1qrp6el's score-60 comment says PLA is corn starch based. That is not an emissions result. No excerpt was supplied for r/prusa3d 1gdjje6 or r/functionalprint 13fi255.",
  "related": [
    "abs_print",
    "asa_print",
    "abs_enclosure",
    "warping",
    "heat"
  ],
  "faq": [
    {
      "q": "Does PLA get a free pass?",
      "a": "No. The 2016 paper still measured ultrafine particles from PLA printers, and lactide from PLA at about 4 to 5 micrograms per minute. Styrene in that paper is the ABS and HIPS result, about 10 to 110 micrograms per minute. Lower is not zero."
    },
    {
      "q": "Is a recirculating carbon filter enough?",
      "a": "The paper's wording is combined gas and particle filtration, as an alternative to being careful in a poorly ventilated room. It does not certify a particular hobby filter. Prusa still says ventilate, and says not to draft the print while you do it."
    }
  ],
  "sources": [
    {
      "title": "Prusa Knowledge Base, ABS",
      "url": "https://help.prusa3d.com/article/abs_2058",
      "kind": "manufacturer"
    },
    {
      "title": "Prusa Knowledge Base, ASA",
      "url": "https://help.prusa3d.com/article/asa_1809",
      "kind": "manufacturer"
    },
    {
      "title": "Azimi et al. 2016, Environmental Science & Technology, DOI 10.1021/acs.est.5b04983",
      "url": "https://pubs.acs.org/doi/full/10.1021/acs.est.5b04983",
      "kind": "other"
    },
    {
      "title": "Bambu ABS technical data sheet",
      "url": "https://cdn.shopify.com/s/files/1/0645/5876/0155/files/Bambu_ABS_Technical_Data_Sheet_V3.pdf",
      "kind": "datasheet"
    },
    {
      "title": "Polymaker PolyLite ABS technical data sheet",
      "url": "https://cdn.shopify.com/s/files/1/0548/7299/7945/files/PolyLite_ABS_TDS_EN_V5.4.pdf",
      "kind": "datasheet"
    },
    {
      "title": "Community source, r/prusa3d 108oby3",
      "url": "https://www.reddit.com/r/prusa3d/comments/108oby3/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/BambuLab 1vj3wsm",
      "url": "https://www.reddit.com/r/BambuLab/comments/1vj3wsm/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/3Dprinting 1qrp6el",
      "url": "https://www.reddit.com/r/3Dprinting/comments/1qrp6el/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/prusa3d 1gdjje6",
      "url": "https://www.reddit.com/r/prusa3d/comments/1gdjje6/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/functionalprint 13fi255",
      "url": "https://www.reddit.com/r/functionalprint/comments/13fi255/",
      "kind": "reddit"
    }
  ],
  "recommendations": [
    {
      "rank": 1,
      "note": "Bambu ABS lists a nozzle of 230–260 °C (446–500 °F) and a bed of 90–110 °C (194–230 °F). Drying is 80 °C (176 °F) for 8 hours. The fumes guidance below is Prusa's and the 2016 study, not a sentence on this data sheet.",
      "brand": "Bambu Lab",
      "product": "ABS",
      "material": "ABS",
      "url": "/brand/bambu-lab/abs",
      "nozzle": "230–260 °C (446–500 °F)",
      "bed": "90–110 °C (194–230 °F)",
      "pricePerKg": null,
      "datasheetUrl": "https://cdn.shopify.com/s/files/1/0645/5876/0155/files/Bambu_ABS_Technical_Data_Sheet_V3.pdf",
      "affiliateUrl": null
    },
    {
      "rank": 2,
      "note": "PolyLite ABS lists the same nozzle, 230–260 °C (446–500 °F), and the same bed, 90–110 °C (194–230 °F). Drying is 70 °C (158 °F) for 6 hours. Polymaker's glance table lists an HDT of 100 °C (212 °F) at 0.45 MPa for this family. That is heat, not a fume measurement.",
      "brand": "Polymaker",
      "product": "Polylite ABS",
      "material": "ABS",
      "url": "/brand/polymaker/polylite-abs",
      "nozzle": "230–260 °C (446–500 °F)",
      "bed": "90–110 °C (194–230 °F)",
      "pricePerKg": null,
      "datasheetUrl": "https://cdn.shopify.com/s/files/1/0548/7299/7945/files/PolyLite_ABS_TDS_EN_V5.4.pdf",
      "affiliateUrl": null
    },
    {
      "rank": 3,
      "note": "The catalog lists 250–270 °C (482–518 °F) and a bed of 100–120 °C (212–248 °F). Prusa's ASA article recommends 260 °C (500 °F) and a bed of 105 °C (221 °F) then 110 °C (230 °F), and it says ASA releases potentially dangerous fumes.",
      "brand": "Prusament",
      "product": "ASA",
      "material": "ASA",
      "url": "/brand/prusament/asa",
      "nozzle": "250–270 °C (482–518 °F)",
      "bed": "100–120 °C (212–248 °F)",
      "pricePerKg": null,
      "datasheetUrl": null,
      "affiliateUrl": null
    }
  ]
}