Reusable Foam Filter for Luna II Series CPAP Machines (pk. 2)

The reusable black foam pollen filter for Luna II series machines is on sale for Black Friday 2026 at GoCPAP from Nov 1st to Nov 30th. This is the standard filter for all Luna II CPAP and BiPAP machines, and it can be cleaned and reused instead of thrown away. No prescription is needed.

This Black Foam Pollen Filter from Spirit Medical is the standard-equipment filter for all Luna II Series CPAP and BiPAP machines. Unlike a disposable filter, it's designed to be cleaned and reused rather than thrown away after a month.

Is This the Right Filter for You?

This is the correct filter if you own a Luna II Series machine and want the standard reusable foam filter it originally shipped with. If you'd prefer additional filtration in a disposable format instead, the white ultra-fine filter is available as an alternative elsewhere on the site — but never run both filters in your machine at the same time.

Key Features at a Glance

• Reusable black foam filter, washable rather than disposable
• Standard-equipment filter supplied with all Luna II Series devices
• Compatible with all Luna II Series CPAP and BiPAP machines
• Compact size: approximately 2" long by 1.125" wide
• 2 filters per pack

One Filter, Not Two

Unlike some CPAP machines that use two separate filters, the Luna Series uses a single filter to catch particulates as air enters the machine — either this reusable black foam filter or the white ultra-fine disposable filter, available elsewhere on the site for customers who want additional filtration capability. Do not use both filters at the same time in your Luna CPAP. For complete instructions, review the documentation that came with your equipment.

Cleaning & Replacement

• Rinse the foam filter weekly under clean water to remove trapped dust and debris.
• Let it air dry completely before reinstalling it in your machine.
• Replace the filter every 6 months, or sooner if it's visibly worn, discolored, or damaged even with regular cleaning.

Specifications

Complete Your Luna II Setup

Considering an upgrade? The Luna II has been succeeded by the current-generation Luna G3X Auto CPAP with Humidifier. Traveling instead? See the Luna TravelPAP Travel CPAP Machine and its Luna TravelPAP Filter 2-Pack. See more from the brand on the React Health brand page.

Frequently Asked Questions

How often should I clean this filter?

Rinse it weekly under clean water and let it air dry completely before reinstalling.

How often should I replace it?

Every 6 months, or sooner if it looks worn, discolored, or damaged.

Can I use the white ultra-fine filter and this foam filter at the same time?

No. The Luna Series uses a single filter at a time. Using both together is not supported — choose one or the other.

Does my Luna II machine come with this filter already?

Yes, this reusable foam filter is the standard-equipment filter supplied with all Luna II Series devices.

Is the Luna II Auto CPAP Machine still available?

No, that machine is currently discontinued. The current-generation equivalent is the Luna G3X Auto CPAP with Humidifier.