Whole-Home Air Care

Winix 9800: 4-Stage True HEPA Power

The Winix 9800 cleans large rooms with four filtration stages, WiFi control and smart sensors that switch modes for you. It is AHAM verified at 522 sq ft and can cycle a 2,506 sq ft room once per hour.
Winix 9800 air purifier with its back panel open showing three stacked filter layers
How it's built

Four stages that work in order

Air passes a washable pre-filter, then activated carbon for odors, then True HEPA, with PlasmaWave finishing the job. Each stage protects the next, so the HEPA filter keeps its efficiency longer instead of clogging on big debris.
Washable fine mesh pre-filter

The first layer catches hair, lint and larger dust before it reaches the carbon and HEPA filters. Rinse it, dry it fully and put it back, which keeps the costlier filters working the way they should.

True HEPA stage for fine particles

This is the filter that traps what you cannot see, like pollen, dust and pet dander. Plan on replacing it roughly every twelve months, with the unit reminding you when the time arrives.

PlasmaWave, explained plainly

PlasmaWave is a low-voltage ionization step designed to reduce airborne pollutants while producing far less ozone than conventional ion generators, adding cleaning power without the concern.

Dual sensors and auto mode

Two sensors track air quality and room conditions, and auto mode responds to what they read. The air quality indicator gives you a visible read on whether the room is holding or improving.

Cleaner air with less guessing

Sensors watch the air and adjust the fan for you, so the 9800 handles dust and odors without fiddling. Filters are easy to check, wash or swap when the indicator says so.
Winix 9800 air purifier with a glowing air quality indicator ring in a living room

Set it once and let it react

Dual smart sensors read the room and an air quality indicator shows what they find, so the unit shifts speed on its own instead of waiting for you to notice the air went stale.

Winix 9800 air purifier running beside a bed in a darkened bedroom at night

Sleep-friendly at 26.2 decibels

The quietest setting runs at 26.2 dB, and automatic sleep mode dims the unit and slows it down at night, so a bedroom stays dark, calm and still getting cleaned air.

Winix 9800 air purifier standing on a kitchen floor after cooking

Less odor, not just less dust

An activated carbon layer works alongside the True HEPA filter to reduce everyday smells from cooking, pets and smoke, which matters most in kitchens and shared living rooms.

Winix 9800 air purifier centered in an open-plan living and dining area

A room cleaned every twelve minutes

AHAM verified at 522 sq ft, the 9800 delivers about 4.8 clean air changes per hour there and can cycle a room as large as 2,506 sq ft once in a single hour.

An adult hand holding a smartphone near a Winix 9800 air purifier in a living room

Control it from your phone

WiFi plus Alexa support lets you check status, change modes and monitor the unit through the Winix Smart App, handy when you are away or standing in another room.

Two hands lifting the pre-filter panel out of a Winix 9800 air purifier

Filters you can plan around

The pre-filter is washable, the carbon filter lasts roughly three months and the True HEPA filter about twelve, with a replacement indicator so upkeep stays predictable.

Where the 9800 earns its place

It suits homes that need real cleaning power in a shared space, from a pet-filled living room to an open plan area. At 18.7 lbs, it moves easily between rooms.
Winix 9800 air purifier standing beside a bed in a dimly lit evening bedroom

A bedroom that stays dark

Automatic sleep mode dims and quiets the unit when the room darkens, so overnight cleaning stays at a low 26.2 dB. One owner did note that auto mode drops out in a fully dark room.

A cat and a small dog resting on a rug near a Winix 9800 air purifier in a living room

Pet dander and everyday dust

Owners report visibly dustier filters after weeks of use, which is exactly the point. The True HEPA stage works on dander and fine dust while the pre-filter catches hair and lint.

Winix 9800 air purifier on a kitchen floor beside a counter with a pot after cooking

Kitchen smoke and cooking odors

One owner cleared a burned kitchen smell quickly. The activated carbon stage is what does that work, which makes the 9800 useful in cooking spaces and open kitchens.

Winix 9800 air purifier in the corner of a compact apartment living space

Apartment living on a budget

A verified 522 sq ft rating covers most apartments, and owners say a single unit handles the space well. WiFi control adds convenience without pushing the price premium.

Winix 9800 air purifier in a large open-plan living room with tall windows

Whole-room cleanup in an hour

Cycling a 2,506 sq ft room once per hour makes the 9800 practical for open living areas and larger bedrooms where a smaller unit would fall behind the airflow.

Winix 9800 air purifier on a table with a spare filter set arranged in front of it

An easy upgrade from older Winix

Owners coming from earlier Winix models call the 9800 a clear step up, and one buyer purchased three. The filter layout stays familiar while WiFi and dual sensors are added.

Getting started

Three steps to steady clean air

Winix 9800 air purifier placed on a hardwood floor with clear space on all sides

Place it with clearance

Set the unit on a hard floor with space around the intake and outlet. Keeping nearby furniture a few inches clear helps the sensors sample real room air.
An adult hand holding a smartphone next to a Winix 9800 air purifier during app setup

Connect the Smart App

Add the 9800 to the Winix Smart App over WiFi to monitor air quality and change modes from your phone. Alexa setup follows the same short routine once the unit is online.
An adult hand rinsing the mesh pre-filter from a Winix 9800 air purifier under a kitchen tap

Watch the filter indicators

Rinse the pre-filter monthly and let it dry completely before reinstalling. The unit flags the carbon and HEPA changes, so replace those on its schedule rather than by guesswork.
From owners

What owners say after months of use

Practical questions

Answers before you buy the 9800

AHAM verifies it at 522 sq ft, the size where its clean air delivery rate is measured. Winix also states it can cycle a room up to 2,506 sq ft once per hour, so larger open areas do get cleaned, just less frequently per hour.
PlasmaWave is a low-voltage ionization step designed to reduce airborne pollutants while producing much lower ozone levels than conventional ion generators. It acts as a fourth cleaning stage and can be switched off if you would rather rely on filtration alone.
The carbon deodorization filter is listed at roughly three months and the True HEPA filter at about twelve, while the pre-filter is rinsed monthly. A replacement indicator on the unit tells you when each stage is due.
The minimum noise level is 26.2 dB and automatic sleep mode dims the unit in the dark. One owner did report that sleep mode takes over in a very dark room and auto mode does not stay engaged, so check that behavior if you need auto at night.
WiFi and the Winix Smart App add remote monitoring and control plus Alexa support, but the unit still cleans and adjusts on its own through its sensors and auto mode. Owners note a router reboot can require re-registering the device.
Owners moving up from earlier Winix models describe the 9800 as a clear step forward in power and features, and one buyer liked it enough to purchase three. The filter layout stays familiar while WiFi and dual sensors are added.