Introduction
This manual provides essential instructions for the proper installation, operation, and maintenance of your Nordyne Miller Foam Furnace Filters, Model 300964000. Adhering to these guidelines will ensure optimal performance of your furnace and prolong the life of your filters.
Product Overview
The Nordyne Miller Foam Furnace Filters are designed to provide efficient air filtration for CMF & CMH Miller furnace doors. These filters are washable and reusable, contributing to consistent furnace airflow and protecting internal components from dust accumulation. Each package contains two filters.

This image displays two Miller Nordyne foam furnace filters, designed for use in CMF & CMH Miller furnace doors. The filters are 1/4 inch thick, 16 inches wide, and 26 inches long.
- Dimensions: 1/4 inch thick x 16 inches width x 26 inches length
- Compatibility: Designed for CMF & CMH Miller furnace doors
- Features: Washable and long-lasting foam material
- Quantity: Supplied as a pair (2 filters)
Installation and Replacement
Proper installation ensures effective filtration and furnace operation. These filters mount directly into the furnace door using built-in retainers.
- Locate Filter Compartment: Identify the furnace door where the filter is housed.
- Remove Old Filter: Carefully slide out the existing filter from its retainers.
- Insert New Filter: Slide the new Nordyne Miller foam filter into the retainers until it is securely in place. Ensure it sits flush within the compartment.
- Secure Door: Close and secure the furnace door.
It is recommended to have a clean, dry filter ready for immediate replacement during maintenance.
Operation
Once installed, the furnace filters operate passively by trapping dust and debris from the air circulating through your furnace. No active user intervention is required during normal operation. Ensure the furnace door is properly closed after filter installation to maintain system efficiency and safety.
Maintenance
Regular cleaning and replacement are crucial for maintaining furnace efficiency and indoor air quality. Filters should be serviced at least once a month, or more frequently depending on usage and environmental conditions.
- Removal: Turn off your furnace. Carefully remove the dirty filter from the furnace door.
- Cleaning: Hand wash the foam filter using mild soap and lukewarm water. Gently squeeze to remove dirt and rinse thoroughly until the water runs clear. Avoid harsh chemicals or abrasive cleaning tools.
- Drying: Allow the filter to air dry completely before reinstallation. Do not use heat to dry the filter, as this may damage the foam material.
- Replacement: Once dry, reinstall the cleaned filter or replace it with the second filter provided in the pair.
- Schedule: Repeat this process every 30 days or as necessary to ensure optimal furnace performance and air quality.
Troubleshooting
| Issue | Possible Cause | Solution |
|---|---|---|
| Reduced Airflow from Vents | Clogged or dirty filter. | Clean or replace the furnace filter as per maintenance instructions. |
| Increased Dust in Home | Filter not installed correctly or filter is saturated. | Ensure filter is properly seated. Clean or replace the filter. |
| Furnace Overheating | Severely restricted airflow due to a heavily clogged filter. | Immediately turn off the furnace. Replace the filter. If the issue persists, contact a qualified HVAC technician. |
Specifications
- Model Number: 300964000
- Brand: Nordyne
- Material: Foam
- Product Dimensions: 16 inches (Width) x 26 inches (Length) x 0.25 inches (Thickness)
- Item Weight: Approximately 1 pound (per pair)
- Compatible Devices: Furnaces (specifically CMF & CMH Miller furnace doors)
- Quantity: 2 filters per package
- UPC: 639385773386
- Date First Available: December 15, 2016
Warranty Information
Specific warranty details for the Nordyne Miller Foam Furnace Filters (Model 300964000) are not provided in this document. For information regarding product warranty, please refer to the original product packaging or contact Nordyne customer support directly.
Customer Support
For further assistance, technical support, or inquiries regarding your Nordyne Miller Foam Furnace Filters, please contact Nordyne customer service. Contact information can typically be found on the manufacturer's official website or on the product packaging.





