How To Shop For The Perfect Vacuum Cleaner
If possible (and especially if you suffer from asthma), test air-tightness for yourself. One way is to vacuum for a bit with a floor model and then see how much dust has collected on the outside of the unit. Try assembling and disassembling the attachments before you buy. Make sure that they’re easy to assemble, that they stay together and are airtight during use, and that you can still disassemble them with a minimum of effort.