According to Jim... A 1/4" fitting allows for 14 CFM of flow at 1000 microns. If you want to learn more about evacuation speed, triple evacuation and Can Water Freeze In A Vacuum? Check out the latest episode of the HVAC Know It All Podcast. Here's the first episode https://youtu.be/tONTEmOvbNA?si=6hyqSZOxd4H-fmFj Jim refers to the @NAVAC 2 CFM battery operated pump being efficient with short, large diameter hoses as the pull down reached approximately 1000 microns. #hvac #hvacr #refrigeration #hvacsystem #hvacevacuation #hvaclife #hvaceducation #hvacknowledge #hvacservice #hvactraining #hvacinstall #commercialHVACservice #residenitalhvactech

Posted by HVAC Know It All at 2025-09-02 16:33:36 UTC