These blue and white foam filters are an alternative to the ResMed 30907 & 30908 air filters and fit the S7 series of CPAP machines. These are not the original ResMed manufactured filters but an alternative made by Tiara Medical Systems. These CPAP and VPAP filters are of similar quality as the authentic S7 filters by ResMed.

These spare filters are suitable for:

• ResMed S7 Series CPAP Machines
• AutoSet Spirit
• VAPAP III
• VPAP II
• ST
• ST-A

These filters measure 1 1/4" x 1 1/2" or 30mm x 40 mm.

Why buy alternative filters?

Like ink for printers, non-branded consumables are often cheaper to buy and as good a quality as the originals they were designed to replace. And if you are shopping here for CPAP machines, masks or accessories anyway, you may as well add a few filters you will need in the future anyway and save on postage overall.

When to replace filters?

As a rule of thumb, most manufacturers recommend to replace the disposable filters at least every one to two months. Obviously, this depends on the air quality where you are so keep an eye on the filter and replace it when it discolours. With these 3-packs for the S7 series, you will have a few spare filters ready when you need them.