Comfort First Filtered Diffuser – Commercial Filtered Diffuser 4-Way adjustable Vent Diverter – Filtered Supply Diffuser – Filtered Air vent


Airflow in commercial buildings or office spaces can be unpredictable and downright annoying if the temperature is inconsistent. Say goodbye to random cold or hot spots and say hello to even airflow! This air diffuser: 

  • Offers comfortable airflow 
  • Filter office air to capture germs, viruses, and allergens
  • Easy to replace MERV 12 and MERV 14 filters
  • Has easily adjustable louvers

You can now easily dictate airflow controls within your building while still maintaining a sleek and professional aesthetic. Filter options include: 

  • MERV12: Perfect for offices and most buildings. (Selected by default)
  • MERV14: Used in hospitals, labs, and other places where static pressure isn’t an issue.

Prices vary based on the options selected below.

If you just need replacement filters – click the filter link.

You will need to make a selection in each of the drop-downs below before adding products to your cart.


The Comfort First Filtered Diffuser – Commercial Filtered Diffuser 4-Way Vent Diverter comes with MERV 12 filters and traps any pollutants or particles as small as .03 microns in size. With the high ability to filter, this air diffuser is at a 40.6% efficiency level at 150 fpm.

This easy-to-install air diffuser works with any 24” x 24” drop ceiling with a T-bar grid system or Fineline system. A more efficient MERV 14 filter is also available. Whilst the CFFD was designed as a 2′ x 2′ air diffuser for drop ceilings it can also easily be mounted on hard ceilings thanks to our surface mount back pan.

Are you tired of having spots in your office that are either too hot or too cold? Do you want some degree of control over the airflow in your building? Fix these problems and improve indoor air quality with an air diverter – Filtered Supply Diffuser or Filtered Air Vent!


  • Filters the air entering the room – MERV 12 or MERV 14.
  • Capture germs and viruses such as Covid 19.
  • The four-way adjustable louvers direct airflow allowing you to eliminate drafts.
  • Minimizes the hot and cold spots throughout a building, making your employees more comfortable.
  • Our diffuser hangs 1.75 inches from the ceiling, making it discreet enough to use in the office, restaurant, hotel, or retail setting.
  • Due to the increase in Steel prices, shipping and tariffs we have had to increase our price.



  • Easy-to-maneuver louvers
  • Controlled airflow
  • Easy to install
  • 24” x 24″ width, depth below the ceiling 1.75
  • MERV 12 & MERV 14 Filters that are easy to replace.
  • Improves Indoor Air Quality (IAQ) – captures germs, viruses, bacteria, and allergens
  • Powder-coated steel supply vent with aluminum louvers.

Additional information

Weight 12 lbs
Dimensions 25 × 24 × 4 in
Select Filter MERV

MERV 12, MERV 14

Select Backpan size

None, Universal Backpan, 6 Inch, 8 Inch, 10 Inch, 12 Inch, 14 Inch, 16 Inch, Surface Mount

Include first filter change out (Filters ship free and at volume pricing)

No, Thanks, Yes, Please!


Mounting Options

How do I choose a Backpan?

Selecting a back pan is determined by the type of ceiling your office has and what size the neck is that attaches to the duct work. If you have a standard perforated diffuser that has pins holding the screen in place  from each corner of the back pan, you may be able to use this back pan for the installation. If you have any other style diffuser you will need to buy one of our 3 back pan options.

Option # 1

The powder coated steel back pan is used in standard T-bar suspended ceilings. Prior to ordering you need know the round neck size that your duct work will attach to.

They are available in 6″, 8″, 10″, 12″, 14″ and 16″ round.

Option # 2

The fiberglass back pan is for use in T-bar suspended ceilings for multiple installations when you do not know the neck size.

It can save time to buy the fiberglass covered steel back pan and take various sized start collars and duct sealant with you on the job.

Most contractors and facility managers can purchase start collars from their local HVAC supply house. This back pan allows you to use start collars at the job site and cut the fiberglass to the neck size desired using tin snips or utility knife. This type of installation normally needs an HVAC contractor or skilled facilities HVAC technician.

Option # 3

The Surface Mount back pan is for use in hard ceilings; plaster or drywall. It is mounted onto the ceiling and the diffuser fits inside this back pan. The back pans allow the diffuser to hinge down for easy filter replacement.

Filtration Options

MERV12 rated Filter –

Best for Offices and most applications

Filters trap ductwork pollution particles .03 microns in size at a 40.6% efficiency level at 150 fpm, improving air quality which helps to reduce allergic reaction and illness. Helps prevent dust buildup on acoustical ceiling tiles, maintaining a cleaner appearance.

MERV 14 rated Filter –

Hospitals, Labs and areas that require more filtration, where Static Pressure is not an area of concern.

Filters trap ductwork pollution particle .03 microns in size at a 66% efficiency level – 1.3 microns – 90% efficency lever, improving air quality which helps to reduce allergic reaction and illness. Helps prevent dust buildup on acoustical ceiling tiles, maintaining a cleaner appearance.

CFFD Performance Data MERV 12

CFFD Performance Data MERV 14

CFFD Electrostatic Filter MSDS

Data Sheets and Downloads

Comfort First Filtered Diffuser Assembly Instructions

Comfort First Filtered Diffuser Submittal

Comfort First Filtered Diffuser Specification Sheet

Comfort First Filter Replacement Instructions

CFFD Performance Data MERV 12

CFFD Performance Data MERV 14

CFFD Electrostatic Filter MSDS

Comfort First Carbon Filter Replacement Instructions