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These are the original, OEM expandable "accordian" style, factory recommended replacement filters. MERV 10 rated.

This is the high efficiency filtering media, which is the heart of your air cleaner. It will last from one to two years depending on the operation of your heating and/or air conditioning system.

In any application, the life of the media is dependant upon the total volume of air being moved through it as well as the amount of particulate it is filtering.

Benefits:

• Peak performance – you get the best performance when you use original replacement parts from Aprilaire.
• Convenience – Minimal maintenance because of the large filter area and unique design the filter media can last from 1 to 2 years before it needs to be replaced. This means less work for you!
• Peace of mind- Particles that are caught on the filter media are retained and not "reintroduced" back into the home.

* All measurements are expressed in inches

Original Honeywell MERV 10 Factory Replacement Filter

Ultra-Web technology is exclusive to high-efficiency Honeywell Media Air Cleaners. Media air filters, at the microscopic level, consist of an interlocking network of fibers that appear quite porous. This porosity is necessary to allow air to pass through the unit with minimal pressure drop. The interlocking fibers of the Ultra-Web material form a web that captures particles that pass right through them. The particles are captured three different ways:

• Diffusion: The random trajectory of many particles, jostled by molecules, carries them directly into the path of the fiber
• Impaction: Many particles are too heavy to move out of the path of a fiber, so they slam into a fiber and stick
• Interception: Random air current cause particles to sweep too close to a fiber, and due to molecular attraction, the fiber grabs the particle

For optimum system performance, replace the filter every six months (before heating season and before cooling season). Adjust the schedule to your needs, but replace the filter at least annually.

Source Control:

Reduces the level of indoor air pollution. For example, encouraging smokers to step outside to indulge their habit, and keeping windows closed during the prime ragweed season, both control pollution at the source.

Ventilation:

Replaces a portion of stale indoor air with fresher outdoor air. Opening the windows when you burn toast, for instance, is a good example of ventilation.

Filtration:

Actually reduces the level of particles in the air. Install a whole-house air cleaner, and whenever the blower motor runs, dirty air will be filtered as it passes through the heating and cooling equipment.

Fits Honeywell Series: F200, F35

The PopUP revolutionizes air filtration with a design that self-assembles, drastically reducing installation time and the messiness of replacement. When maintenance is required, just remove, collapse and dispose of the entire filter - no more seperate parts (pleat combs, inner frames) needed.

Key Features:

• Minimum Efficiency Reporting Value: MERV 11
• No assembly required
• Fiberglass-free filtration
• Quick, easy maintenance.
• Provides more surface area for higher efficiency air filtration.
• PopUP is available in six sizes, compatible with all Honeywell and most competitive MACs.
• Limited Warranty

* All measurements are expressed in inches

Replaces older Honeywell model number F35R.

The FC40R Return Grille Filter is a high-efficiency, long-life replacement for return grille applications. Honeywell recommends allowing a depth of seven inches behind the grille to provide space for the deeper filter and airflow through the filter. Honeywell recommends changing your filter once a year. It may be necessary to replace it sooner depending on the conditions in your home.

Filter features 1" lip around upstream side

MERV 8

Features:

• Mounts in most third party return filter grilles (features integral gasket around upstream side of filter).
• Provides high-efficiency alternative to one-inch filter.
• Captures particles as small as 0.3 micron.
• Pleated filter for greater media capacity.
• Easy installation. Pre-assembled filter easily inserts into and out of existing return grille.
• Exclusive frame design nests properly into place.
• Low pressure drop reduces strain on equipment, provides a comfortable air flow and maintains equipment efficiency longer than standard filters.

* All measurements are expressed in inches