Best air purifier if you already upgraded HVAC filters
A high-efficiency HVAC filter can improve whole-home air quality, but it may not remove pollutants quickly in every room. Here is how to…
Sizing & comparisons
Help matching air purifiers to room size, filter type and household air problems.
Comparisons
Air purifier versus HVAC filter upgrades
An HVAC filter upgrade can reduce airborne particles throughout a home, while a portable air purifier can deliver stronger filtration in…
Better HVAC filter instead of a room purifier
A higher-quality HVAC filter can improve air quality throughout a home, but it does not always replace a room purifier. The right choice…
DIY box-fan filter versus a commercial air purifier
A box fan with a properly fitted furnace filter can be an effective low-cost way to reduce airborne particles, but a commercial air…
Do You Need an Air Purifier With MERV 13 HVAC Filters?
MERV 13 HVAC filters and portable air purifiers solve similar problems in different ways. Learn when your HVAC filter may be enough, when a…
HEPA versus ionizer air purifier
HEPA and ionizer air purifiers both target airborne particles, but they work very differently. Learn which option is safer and more…
Portable Air Purifier Versus Whole-House Unit
Portable air purifiers are flexible and easy to deploy in individual rooms, while whole-house systems can treat air throughout a home…
Quiet sleep mode versus full CADR
Quiet sleep mode is usually best for overnight comfort, while full CADR cleans air faster. The right choice depends on room size, pollution…
Smart Air Purifier Versus a Simple Dial Model
Smart air purifiers add app controls, scheduling, and automatic sensor-based adjustments. Simple dial models are easier to operate and may…
Tower versus box air purifier
Tower air purifiers save floor space and often fit neatly beside furniture, while box-style models can prioritize airflow, filter area, and…
UV air purifier versus HEPA-only
HEPA-only air purifiers are usually the simpler choice for dust, pollen, pet dander, and smoke particles. UV-equipped models may add…
Size & CADR
Air Purifier for a 1000 Sq Ft Open Living Room
A 1,000 sq. ft. open living room needs more than a large coverage claim. Compare smoke CADR, account for ceiling height and layout, and…
Two bedroom air purifiers versus one large unit
Two appropriately sized air purifiers usually provide better bedroom coverage than one large unit, especially when doors are closed. One…
What size air purifier for a 400 sq ft room
For a 400-square-foot room with an 8-foot ceiling, look for an air purifier with at least about 267 CFM of smoke CADR. A higher CADR can…
AHAM CADR for Smoke Versus Dust Versus Pollen
AHAM CADR ratings show how quickly an air purifier removes smoke, dust, and pollen from room air. Here is how to compare the three numbers…
Air Changes per Hour for a Bedroom Purifier
Air changes per hour, or ACH, estimates how many times an air purifier can filter the air in a room each hour. Use the room volume and the…
Can One Air Purifier Cover an Open Floor Plan?
One air purifier can cover an open floor plan if its clean air delivery rate is high enough for the combined space and air can circulate…
Coverage Claims Versus Real CADR Math
Air purifier coverage numbers are only useful when you know the CADR and assumptions behind them. Here is how to calculate the airflow your…
One large air purifier versus two small ones
One large air purifier is usually more efficient for a single open room, while two smaller units can provide better coverage across…
What CADR Means on an Air Purifier
CADR is a measure of how quickly an air purifier delivers filtered air. Understanding the rating helps you compare models and choose a…
