As an Amazon Associate I earn from qualifying purchases.Updated: March 18, 2026
The Humidifier Filter in your Aprilaire 700 is essential for cleaning the air and adding moisture. Over time, it collects dust and debris, reducing its effectiveness and potentially harming your device. Replacing it every season ensures optimal performance and prolongs the lifespan of your humidifier.
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Function: The Humidifier Filter removes impurities from the water before it's released into the air as humidity.
Signs it needs replacing: Reduced humidity output, visible dirt buildup on the filter, a musty odor coming from the humidifier.
OEM vs aftermarket: Aprilaire OEM filters guarantee compatibility and performance but are generally more expensive. Aftermarket options can be more affordable but always double-check reviews for fit confirmation before purchasing.
Installation: Usually involves simply removing the old filter and inserting the new one. Refer to your device manual for specific instructions.
Replacement schedule: every season
Compatibility warning: always verify part number matches your exact model before ordering
Pros & Cons
Pros
✓ Restores device to original performance without buying a new unit
✓ Significantly cheaper than a full device replacement
✓ Multiple options available from OEM and aftermarket sellers
Cons
✗ OEM parts cost more than third-party alternatives
✗ Wrong part number will not fit — model verification is essential
Common Use Cases
Scheduled maintenance: replacing on the every season schedule
Performance restoration after noticing reduced output or efficiency
Preventive replacement before a worn part causes secondary damage
Who Should Buy This
Aprilaire 700 owners experiencing reduced humidity output or noticing a decline in their humidifier's performance.
Not ideal for: If your Aprilaire 700 is significantly outdated or experiencing major malfunctions beyond filter replacement, a new unit may be more cost-effective.
Good to Know Before Buying
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Always confirm your exact model number (700) before ordering. Part numbers vary between model variants and production years. Check the label on your device or original documentation to be sure.
Frequently Asked Questions
What is the part number for the Aprilaire 700 Humidifier Filter?
The part number is 10. Always verify this matches your exact model (700) before ordering, as similar models may use different parts.
How often should I replace the Humidifier Filter on my Aprilaire 700?
every season
Will aftermarket Humidifier Filter replacements work in my Aprilaire 700?
Third-party parts are widely available and often cheaper than OEM. Look for listings that specifically mention compatibility with model 700 and check buyer reviews for fit confirmation before purchasing.
Prices change frequently. See the latest deal on Amazon.