This is the pleated cooling air filter for Rainbow e Series machines, Rexair part R12096B, also carried as R-7287. It is not the water basin and it is not the HEPA exhaust filter. This one sits in the cooling path that feeds air over the motor, and its job is to keep dust out of the motor windings and bearings. It is the filter most Rainbow owners forget exists, which is unfortunate, because a clogged cooling filter is one of the quieter ways to shorten the life of an otherwise well-built machine. When this filter loads up the motor runs hotter than it was designed to, and heat is what eventually kills brushes and bearings. Replacing it is a few minutes of work and it is the cheapest insurance a Rainbow owner can buy.
Built for
Annual maintenance on an e Series Rainbow
Most owners change the HEPA filter and never touch the cooling filter. Adding it to a yearly service keeps motor temperature where the designer intended and is the single most overlooked item on these machines.
A machine that runs hot or smells warm
A warm smell or a motor that is hotter than usual at the end of a run is a classic symptom of restricted cooling airflow. Checking this filter should come before assuming the motor itself is failing.
Restoring a used or inherited Rainbow
On a secondhand machine the cooling filter is almost always original and packed. Replacing it along with the HEPA is standard practice when bringing an older e or E2 back into service.
Dusty environments and heavy-use routes
Renovation dust, pet hair and drywall work load this filter far faster than ordinary household use, so machines working in those conditions should be checked more often than once a year.
Specifications
- Manufacturer: Rexair Rainbow
- Part number: R12096B
- Also listed as: R-7287
- Component: Pleated cooling air motor filter
- Fits: Rainbow e Series, models E and E2
- Design: Round pleated element with soft gasket
Frequently asked questions
Is this the same as the HEPA exhaust filter?
No. The HEPA filter cleans the air leaving the machine. This pleated round filter sits in the cooling path that feeds the motor, protecting the windings and bearings from dust. Rainbow machines use both, and they are replaced separately.
Which Rainbow models does it fit?
It is specified for the Rainbow e Series, models E and E2. Rexair revised the design over the years, removing the four legs on the base of the original version and adding a soft gasket on one side that lays over the motor wiring without chafing it, so the current part looks different from a very early original.
How often should the cooling filter be replaced?
Once a year is a reasonable baseline for household use, and more often in dusty conditions or on a commercial route. Inspect it whenever the machine is open for other service and replace it if the pleats are grey and packed.
What happens if I never change it?
Airflow over the motor falls and the motor runs hotter than designed. Sustained heat is what degrades brushes, bearings and insulation, so a neglected cooling filter shortens motor life without ever producing an obvious symptom until something fails.
Discount Cleaning Products is an authorized dealer and stocks this part alongside the matching filters, bags, belts and accessories for the same machine, so a single order covers a full service visit. Orders are handled by a US-based team that works with these machines every day, and part-number questions are answered by people who can cross-check the fitment before you buy.
