Windsor Micro Filtration Vacuum Bags for S12, S15, SR and XP Series Uprights — 10 Pack

Ten bags to a pack, because a Windsor upright on a commercial round gets through them at a rate a three-pack cannot keep up with. SKU 143 covers the S12 and the S15, the SR12, SR15 and SR18, and the XP12, XP15 and XP18, so a mixed fleet of Windsor uprights can be stocked from one box.

The media is a micro-filtration grade rated to capture particles down to 0.3 microns. At that rating the bag is holding dust mite debris and pollen as well as the sand and grit that a vacuum obviously picks up, which is why the air coming out of the exhaust is noticeably cleaner than the air that went in. In an office, a school or a hotel corridor that matters as much as what ends up in the bag.

• Fits: Windsor S12, S15, SR12, SR15, SR18, XP12, XP15 and XP18 uprights
• Pack: ten bags
• Media: micro filtration, rated down to 0.3 microns
• Tools: none needed, the bag compartment opens by hand
• Order as: SKU 143

Change the bag while there is still room left in it. A bag packed solid chokes the airflow the motor depends on, so the machine sounds like it is working harder while picking up less, and the operator ends up going over the same strip of carpet twice. Roughly two-thirds full is the sensible moment; on heavy soil days it comes sooner.

The signs that a bag has gone too far are the same on any of these machines: the motor note climbs, the head becomes lighter to push because less air is pulling it down onto the pile, and fine dust starts showing on the exhaust side. On a commercial round it is worth changing bags to a schedule rather than waiting for the symptoms, since a restricted machine wastes more time on the floor than a scheduled change ever takes.

If you have been hunting for Windsor Sensor bags, S12 replacement bags or SR18 micro filtration bags, this is the pack. Read the model number off the data plate on the machine before ordering, since Windsor uprights of similar size do not all take the same collar.