ReAir Air Filter Size and Specification Breakdown

Best for: Square residential return grilles

Pros

• ASHRAE 52.2 tested
• Metal and polyester frame
• Machine washable and dryable

Cons

• Weight not specified in listing

The Reair 20x20x1 Air filter features square 20-inch by 20-inch dimensions with a 1-inch thickness, engineered for air cleaners across commercial, industrial, and residential HVAC systems. Constructed from a durable combination of metal and polyester, this pleated filter maintains rigid structural stability against intake air velocity. Tested to ASHRAE 52.2 standards, it exhibits an ultra-low pressure drop of 0.38 inches water gauge at 1367 CFM and 0.54 inches water gauge at 1750 CFM, safeguarding your blower motor from unwanted strain while energy bills remain steady.

This reair merv 8 washable filter utilizes a progressive honeycomb structure that captures 90 percent of 3 to 10-micron impurities, such as pollen, dust, and pet dander. Designed to replace up to 60 disposable cardboard filters, it mounts with an included snap-on frame that installs without special tools. The polyester media withstands standard machine washing and dryer cycles up to a maximum temperature of 140 degrees Fahrenheit. For homeowners pairing whole-house intake protection with targeted bedroom filtration, managing return intake airflow complements devices like an airtok air purifier replacement filter in closed rooms.

• Dimensions measure 20 inches long by 20 inches wide with a 1-inch thickness.
• Independent ASHRAE 52.2 testing records 0.38 inches water gauge pressure drop at 1367 CFM.
• Constructed from metal and polyester pleated media for enhanced durability.
• Backed by a 5-year warranty and supports machine washing and low-heat drying.

Best for: High-tonnage central air systems

Pros

• Expansive 20×25 surface area
• Low static pressure drop
• High dust holding capacity

Cons

• Listing limits devices to air cleaners

The Reair 20x25x1 Air filter offers an expanded 20-inch by 25-inch surface area with a 1-inch thickness, making it the highest airflow-capacity option in the brand collection. Built with progressive polyester media and a snap-in mounting frame, it is certified for commercial, industrial, and residential air cleaner applications. Under ASHRAE 52.2 independent testing, it yields a static pressure drop of 0.38 inches water gauge at 1367 CFM and 0.54 inches water gauge at 1750 CFM, enabling high-tonnage HVAC systems to breathe freely without motor suffocation.

This reair 20x25x1 air filter is suited for larger residential floor plans and commercial installations with high volumetric airflow demands. Compared to the square 20×20 model, the additional five inches of width spread captured debris across a larger face area, enhancing dust holding capacity and prolonging steady airflow between washings. The washable pleated media retains full electrostatic attraction after cleaning, safely handling machine wash and dryer cycles up to 140 degrees Fahrenheit while eliminating disposable cardboard waste over its 5-year warranty lifespan.

• Nominal sizing measures 20 inches long by 25 inches wide by 1 inch thick.
• Tested to ASHRAE 52.2 with a low 0.38 inches water gauge pressure drop at 1367 CFM.
• MERV 8 progressive polyester media captures 90 percent of 3 to 10-micron particles.
• Snap-in frame installs in minutes without tools and supports machine wash cycles.

Best for: Mid-sized residential air handlers

Pros

• Verified 0.48 kg weight
• Broad HVAC device compatibility
• MERV 8 electrostatic media

Cons

• Smaller surface area than 16×25

The Reair 16X20X1 Air filter provides a 16-inch by 20-inch frame with a 1-inch thickness and an item weight of 0.48 kg. The manufacturer specifies broad equipment compatibility for this unit, listing air cleaners, air conditioners, furnaces, heat pumps, and unified HVAC systems in commercial, industrial, and residential settings. Its progressive polyester media employs a pleated honeycomb design that arrests 90 percent of airborne impurities between 3 and 10 microns, capturing pet dander, dust, and pollen under standard operating conditions.

This reair 16x20x1 air filter suits property owners with mid-sized furnaces or utility-closet air handlers that cannot fit wider 20-inch or 25-inch frames. It maintains low airflow resistance verified by ASHRAE 52.2 testing, generating 0.38 inches water gauge at 1367 CFM and 0.54 inches water gauge at 1750 CFM. The snap-in frame allows swift removal for machine washing and tumble drying up to 140 degrees Fahrenheit. Those monitoring smart indoor air balance alongside forced-air filtration can pair central maintenance with a dedicated govee filter replacement in isolated living spaces.

• Product dimensions measure 16 inches long by 20 inches wide with a 0.48 kg weight.
• Broadly compatible with furnaces, heat pumps, air conditioners, and air cleaners.
• Delivers MERV 8 electrostatic efficiency capturing 90 percent of 3 to 10-micron particles.
• ASHRAE 52.2 tested pressure drop of 0.38 inches water gauge at 1367 CFM.

Best for: Standard forced-air furnace drops

Pros

• Common 16×25 rectangular size
• Ultra-low airflow resistance
• Replaces up to 60 disposable filters

Cons

• Weight not specified in listing

The Reair 16x25x1 Air filter measures 16 inches by 25 inches by 1 inch, fitting one of the most common residential furnace and air cleaner rack configurations. Constructed with progressive polyester media, this MERV 8 filter captures 90 percent of 3 to 10-micron particles, including dust, pet dander, and pollen. ASHRAE 52.2 laboratory testing confirms airflow resistance metrics of 0.38 inches water gauge at 1367 CFM and 0.54 inches water gauge at 1750 CFM, preventing high-efficiency blower motors from overheating during heavy heating or cooling cycles.

Homeowners with standard forced-air furnace drop-ducts will find this reair 16x25x1 air filter an ideal replacement for single-use cardboard filters. Where the 16×20 size serves compact units, this 25-inch model provides greater surface area, resulting in enhanced dust holding capacity and longer operation between cleanings. The unit installs in minutes using its snap-in frame without tools, features a 5-year warranty, and withstands repeated machine washing and dryer heat up to 140 degrees Fahrenheit to replace up to 60 disposable units.

• Rectangular frame dimensions measure 16 inches long by 25 inches wide by 1 inch thick.
• Pressure drop evaluated to ASHRAE 52.2 standards at 0.38 inches water gauge at 1367 CFM.
• Reusable polyester pleated media eliminates up to 60 single-use filters.
• Compatible with commercial, industrial, and residential air cleaner systems.

Best for: Compact mechanical closets and condos

Pros

• Narrow 14-inch profile
• Verified 0.51 kg weight
• Wide equipment compatibility

Cons

• Reduced dust holding capacity

The Reair 14x20x1 Air filter delivers a compact 14-inch by 20-inch rectangular form factor with a 1-inch thickness and an item weight of 0.51 kg. ReAir lists this unit with comprehensive device support, covering air cleaners, air conditioners, furnaces, heat pumps, and HVAC systems across commercial, industrial, and residential environments. Constructed from progressive polyester, it maintains a static pressure drop of 0.38 inches water gauge at 1367 CFM and 0.54 inches water gauge at 1750 CFM according to ASHRAE 52.2 testing.

This reair 14x20x1 air filter is specifically tailored for tighter mechanical spaces, such as manufactured home furnaces, condominium air handlers, or compact ceiling returns. While larger 16-inch and 20-inch filters exceed the dimensions of narrow intake slots, this 14-inch model slides into restricted openings without modification. Its honeycomb electrostatic media arrests 90 percent of 3 to 10-micron particles, resists clogging through progressive fiber density, and handles repeated washing machine and dryer cycles up to a maximum temperature of 140 degrees Fahrenheit.

• Compact dimensions of 14 inches long by 20 inches wide with a 0.51 kg weight.
• Certified for heat pumps, furnaces, air conditioners, and air cleaners.
• Tested to ASHRAE 52.2 with a low 0.38 inches water gauge drop at 1367 CFM.
• Snap-in frame design allows machine washing and low-heat tumble drying.

Best for: Narrow elongated return ducts

Pros

• Extended 25-inch intake length
• Low static pressure drop
• Multi-equipment compatibility

Cons

• Weight not specified in listing

The Reair 14x25x1 Air filter provides a 14-inch by 25-inch rectangular frame with a 1-inch profile, designed for narrow, high-velocity intake channels. Constructed from pleated polyester, it delivers MERV 8 particle capture by trapping 90 percent of airborne contaminants in the 3 to 10-micron range under standard operating conditions. Evaluated under ASHRAE 52.2 standards, it maintains a static pressure drop of 0.38 inches water gauge at 1367 CFM and 0.54 inches water gauge at 1750 CFM to support balanced equipment airflow.

This elongated reair 14x25x1 air filter serves residential and commercial setups that feature slim return air drops where standard 16-inch wide filters cannot fit. The extended 25-inch length compensates for the narrower 14-inch width by offering more filter media face area than the 14×20 format, increasing overall dust holding capacity. Compatible with air cleaners, air conditioners, furnaces, heat pumps, and HVAC systems, it installs via a snap-on frame and withstands regular machine washing and dryer heat up to 140 degrees Fahrenheit. Readers familiar with multi-layer synthetic media in automotive systems, such as febreze cabin air filters, will recognize similar electrostatic trapping principles in ReAir progressive polyester fibers.

• Elongated dimensions measuring 14 inches long by 25 inches wide with a 1-inch thickness.
• Compatible with furnaces, air conditioners, heat pumps, and air cleaners.
• Electrostatic MERV 8 progressive filtration capturing dust, pollen, and pet dander.
• ASHRAE 52.2 verified pressure drop of 0.38 inches water gauge at 1367 CFM.