Replace monthly (or as advised) to prevent bacteria and allergen buildup.

The Ultimate Guide to Buying CPAP Supplies: Comfort, Compliance, and Savings

You can typically buy replacement parts like tubing, individual mask cushions, and filters without a new prescription. 3. Buying Online vs. In-Store

Every 3 to 6 months to avoid small cracks or mineral buildup.

Before you shop, it is important to know what requires a doctor’s note.

Every 1 to 3 months to ensure a proper, leak-free seal.

Where you buy depends on your need for support versus your desire for a deal.