index / extractors
Extractor sheet: airflow in both units
Fume extractor makers publish airflow in either CFM or cubic metres per hour, rarely both. This sheet converts every figure so units stop hiding the gap. 1 CFM = 1.699 m³/h.
| Unit | Airflow as published | Converted | Filtration | Noise | Maker says it suits | Source |
|---|---|---|---|---|---|---|
| xTool SafetyPro AP2 | 150 m³/h | 88 CFM / 150 m³/h | up to 7 layers across the line (99.97% particle claim) | not published as a number | designed for machines with a fume extraction of 150 m³/h or less; 3-inch exhaust pipe | xTool |
| xTool SafetyPro AP2 Max | 700 m³/h | 412 CFM / 700 m³/h | up to 7 layers, adds a formaldehyde filter | not published as a number | suitable if your machine's fume extraction requirement is 700 m³/h or less and its exhaust port diameter is within 60-110mm or 200-250mm | xTool |
| Glowforge Performance Laser Filter | 275 CFM | 275 CFM / 467 m³/h | activated carbon and HEPA (Glowforge Air Filter text) | not published | Glowforge Pro, Plus; 4" hose connector; 350W brushless DC motor | Glowforge |
| Glowforge Craft Laser / Personal Filter | not published | n/a | replaceable cartridges, up to 100 hours of printing each | not published | Glowforge Aura and Spark | Glowforge |
| FumeClear FC-2002 | 153 CFM | 153 CFM / 260 m³/h | multi-stage (model dependent) | <55dB | compact workspaces, light engraving | FumeClear |
| FumeClear FC-2002A | 153 CFM | 153 CFM / 260 m³/h | multi-stage (model dependent) | <55dB | adds support for external venting | FumeClear |
| FumeClear FC-2003 | 194 CFM | 194 CFM / 330 m³/h | multi-stage (model dependent) | <56dB | medium-duty workloads | FumeClear |
| FumeClear FC-2004 | 247 CFM | 247 CFM / 420 m³/h | multi-stage (model dependent) | <58dB | heavier smoke, higher-power lasers | FumeClear |
Why the units matter
xTool's P2S page gives its built-in exhaust fan as 145 CFM. That is about 246 m³/h. xTool's AP2 page says the AP2 is designed for machines at 150 m³/h or less. Put side by side, the published P2S exhaust figure is above the published AP2 limit. xTool's AP2 FAQ makes the same kind of comparison for its P3 (238 m³/h) and says the AP2 must be paired with a duct fan when used with P3.
Kerf Index has not found an xTool statement about the P2S and AP2 pairing.
Use the fume and room lookup to run this comparison for any machine on the machine sheet or for a CFM figure from a manual.