Air purifiers: Montreal, Laval, Longueuil, South Shore and North Shore
Cleaner air, room by room. Health Canada recommends a smoke CADR at least equal to two-thirds of the floor area. We help you choose between our Sharp and GREE purifiers, and we call you back with the price.
Get your price and our advice
Four fields. An advisor calls you back with the price and helps you choose the right model.
Our air purifier brands, across Greater Montreal
Compare the brands →Three answers, and our three purifiers rank themselves.
Room size comes first: a unit that’s too small never catches up with the room’s air. Then what bothers you.
- Powerful enough for 250 sq ft (up to 382 sq ft)
- Smoke CADR 255
- Powerful enough for 250 sq ft (up to 520 sq ft)
- Smoke CADR 347
- Recommended up to 220 sq ft only
- Smoke CADR not published
Choose your room: watch the smoke clear.
Floor area, ceiling, what’s in the air: every setting restarts the clock. The calculation starts from the CADR published by the manufacturer.
One simulated minute passes in under a second. Well-mixed room, doors closed, unit at maximum speed: for guidance only.
Smoke is the finest particles: look at the smoke CADR.
The three models, as a chart and line by line.
Switch the measure: the bars adjust. The table gives everything else, same scale throughout.
CADR measured at maximum speed, published by Sharp and verified by AHAM. GREE does not publish a CADR.
CADR in CFM (sharp.ca). Noise, power and weight of the Sharp units: Sharp spec sheet. GREE: AirGreen product sheet, CADR not published by the manufacturer. Same scale on each row; for noise and power, a shorter bar means quieter or more efficient.
Three numbers on the box decide the size of the room.
Tap the numbers on the KCP110CW label.
Smoke · 347
The number that matters most to Health Canada: the finest particles. It should be at least two-thirds of the floor area.
A hair, smoke, the HEPA test: the same scale.
Tap a particle to see its size. Wildfire smoke is made of the finest ones, 30 times smaller than a hair.
PM2.5 · 2.5 µm
The fine particles in wildfire smoke: 2.5 µm and smaller, about 30 times smaller than a hair (EPA).
Logarithmic scale: otherwise the 0.3 µm particle would be invisible next to the hair.
Five layers, in the order the air passes through them.
Choose Sharp or GREE and open each filter.
True HEPA
It captures 99.97% of particles 0.3 µm and larger in the air that passes through it. Along with the carbon filter, it can last up to 2 years depending on the environment (Sharp).
Pollen, smoke, a closed-up house, dry air: four seasons, four settings.
Tap a season: the scene changes and we tell you which number to look at. Then the official data for summer 2023.
Wildfire smoke can reach us here.
In summer 2023, at the Montréal – York/Roberval station, the 95th percentile of PM2.5 reached 68 µg/m³, compared with 10 µg/m³ the summer before (MELCCFP). Health Canada then advises the highest smoke CADR possible, windows closed.
What matters: Smoke CADR · windows closedNearly seven times more fine particles on the worst days of summer 2023.
The 95th percentile of PM2.5 went from 10 to 68 µg/m³, and the 30 µg/m³ standard was exceeded on 3 days, according to Quebec’s Ministry of the Environment. On those days, Health Canada advises closing the windows and running a purifier with a high smoke CADR.
Calculate the cleaning time for my room →Every room has its own unit.
Tap a number. The air exchanger and the whole-house humidifier take care of the rest of the house.
Living room
The big room: the KCP110CW covers 538 sq ft according to AHAM, 520 sq ft under Health Canada’s rule.
See the KCP110CW →Quiet at night, under $30 a year at medium speed.
Noise at each speed, then what the unit costs if it runs 24 hours a day.
Noise, speed by speed
Both Sharp units go down to 21 dB in Sleep mode. Sharp: spec sheet; GREE: AirGreen product sheet (4 speeds).
| 24 hours a day, all year | Sleep / low | Medium | Maximum |
|---|---|---|---|
| Sharp KCP110CW | $54.8 W | $2627 W | $9294 W |
| Sharp KCP70CW | $54.8 W | $1919 W | $3940 W |
| GREE | —not published | —not published | $6162 W |
Watts × 24 h × 365 × 11.142 ¢/kWh (Rate D, 2nd tier): a maximum, the 1st tier costs less.
Power at each speed: Sharp spec sheet. Standby: 0.7 W.
Watts × hours × 365 × 11.142 ¢/kWh (Hydro-Québec, Rate D, 2nd tier, as of April 1, 2026). At most: the 1st tier costs less.
Sharp and GREE, explained. And what to replace, when.
Who makes them, what they do, the part numbers.
Sharp
Two towers that purify and humidify, controlled with the Sharp Air app, Alexa or Google. According to Sharp, more than 100 million Plasmacluster units sold (2022).
GREE
A compact purifier for a bedroom or an office: pre-filter, HEPA, washable activated carbon and catalytic filter, four speeds and a 24-hour timer.
Microscreen pre-filter
WashableIt catches dust and hair. Wash it as the manual says.
True HEPA filter
FZ-P11HFUUp to 2 years depending on the environment (Sharp). The Sharp Air app shows the filter status.
Activated carbon filter
FZ-J80DFUUp to 2 years depending on the environment (Sharp). It helps with everyday odours.
Humidifying filter
FZ-P11MFUReplace it as the manual says, depending on water hardness. Empty the 0.53 gal tank off-season.
Part numbers for both Sharp units (KCP110CW and KCP70CW). GREE: washable pre-filter and carbon according to our product sheet. We order the original filters for you.
Six common beliefs about purifiers. Test yourself.
Answer: the explanation appears with its source.
Answers to the questions we get asked.
Type a word: the list filters itself.
Health Canada recommends a smoke CADR at least equal to two-thirds of the floor area. The KCP110CW (smoke CADR 347) is suited up to 520 sq ft, the KCP70CW (255) up to 382 sq ft. The manufacturer recommends the GREE up to 220 sq ft.
Clean Air Delivery Rate: the flow of clean air the unit delivers, measured at maximum speed for smoke, dust and pollen. The higher the number, the larger the room can be.
High-efficiency particulate air. The true HEPA filter in the Sharp units captures 99.97% of particles 0.3 µm and larger in the air that passes through it.
Yes, that’s the case Health Canada describes: choose the highest smoke CADR possible, keep doors and windows closed and let the unit run.
No. Carbon helps with some odours, with no standard rating for gases, and a purifier deals with neither carbon monoxide nor radon (Health Canada).
They do different things. The exchanger replaces the air in the whole house with outdoor air; the purifier cleans the air in one room. Health Canada puts ventilation and removing sources first.
In winter, heated air gets dry. The Sharp KCP110CW and KCP70CW purify and humidify at the same time, up to 500 and 400 sq ft. Health Canada aims for 30 to 50% humidity.
At Hydro-Québec’s Rate D (11.142 ¢/kWh at most), a KCP110CW at medium speed, 24 hours a day, costs about $26 a year. At maximum speed, about $92.
On the Sharp units, the HEPA filter and the carbon filter can last up to 2 years depending on the environment; the pre-filter is washable. We give you the part numbers.
Fill in the form at the top of the page or call 514-316-2973. An advisor calls you back with the price and helps you choose.
Breathe better this week.
Tell us the room and what bothers you: smoke, pollen, pets, dry air. We call you back with the price and the right model, Sharp or GREE. And if it’s the whole house that needs fresh air, we come and assess it for free.
Montreal and Laval 514-316-2973 · South Shore 514-316-3007 · sales@airgreen.ca
The people who answer your call and the people who come to your home.
Sources checked October 1, 2026.
- Health Canada, Using a portable air cleaner to improve indoor air, modified December 24, 2021: two-thirds rule, ozone, gases, CO and radon, closed doors.
- Sharp Canada, KCP110CW and KCP70CW product pages (sharp.ca): CADR, AHAM room sizes, humidification, filters, Sleep mode noise, ENERGY STAR. Sharp spec sheet published by FilterDepot.ca: noise, watts, weight, part numbers.
- Sharp, press releases of March 9, 2022 (100 million Plasmacluster units since 2000) and September 15, 2022 (founded in 1912).
- U.S. EPA, Particulate Matter Basics and Guide to Air Cleaners in the Home: size of a hair, PM2.5, definition of CADR.
- MELCCFP, Influence des feux de forêt de l’été 2023 sur la qualité de l’air au Québec: Montréal – York/Roberval station.
- Hydro-Québec, Rate D as of April 1, 2026: 11.142 ¢/kWh above 40 kWh per day.
- AirGreen product sheet for the GREE purifier (floor area, power, noise, dimensions).
Cleaning times and electricity costs: AirGreen calculations, for guidance only (well-mixed room, maximum speed). Claims about Plasmacluster technology are Sharp’s.
Air purifiers: Montreal, Laval, Longueuil, South Shore and North Shore
Cleaner air, room by room. Health Canada recommends a smoke CADR at least equal to two-thirds of the floor area. We help you choose between our Sharp and GREE purifiers, and we call you back with the price.
Get your price and our advice
Four fields. An advisor calls you back with the price and helps you choose the right model.
Our air purifier brands, across Greater Montreal
Compare the brands →Three answers, and our three purifiers rank themselves.
Room size comes first: a unit that’s too small never catches up with the room’s air. Then what bothers you.
- Powerful enough for 250 sq ft (up to 382 sq ft)
- Smoke CADR 255
- Powerful enough for 250 sq ft (up to 520 sq ft)
- Smoke CADR 347
- Recommended up to 220 sq ft only
- Smoke CADR not published
Choose your room: watch the smoke clear.
Floor area, ceiling, what’s in the air: every setting restarts the clock. The calculation starts from the CADR published by the manufacturer.
One simulated minute passes in under a second. Well-mixed room, doors closed, unit at maximum speed: for guidance only.
Smoke is the finest particles: look at the smoke CADR.
The three models, as a chart and line by line.
Switch the measure: the bars adjust. The table gives everything else, same scale throughout.
CADR measured at maximum speed, published by Sharp and verified by AHAM. GREE does not publish a CADR.
Three numbers on the box decide the size of the room.
Tap the numbers on the KCP110CW label.
Smoke · 347
The number that matters most to Health Canada: the finest particles. It should be at least two-thirds of the floor area.
A hair, smoke, the HEPA test: the same scale.
Tap a particle to see its size. Wildfire smoke is made of the finest ones, 30 times smaller than a hair.
PM2.5 · 2.5 µm
The fine particles in wildfire smoke: 2.5 µm and smaller, about 30 times smaller than a hair (EPA).
Logarithmic scale: otherwise the 0.3 µm particle would be invisible next to the hair.
Five layers, in the order the air passes through them.
Choose Sharp or GREE and open each filter.
True HEPA
It captures 99.97% of particles 0.3 µm and larger in the air that passes through it. Along with the carbon filter, it can last up to 2 years depending on the environment (Sharp).
Pollen, smoke, a closed-up house, dry air: four seasons, four settings.
Tap a season: the scene changes and we tell you which number to look at. Then the official data for summer 2023.
Wildfire smoke can reach us here.
In summer 2023, at the Montréal – York/Roberval station, the 95th percentile of PM2.5 reached 68 µg/m³, compared with 10 µg/m³ the summer before (MELCCFP). Health Canada then advises the highest smoke CADR possible, windows closed.
What matters: Smoke CADR · windows closedNearly seven times more fine particles on the worst days of summer 2023.
The 95th percentile of PM2.5 went from 10 to 68 µg/m³, and the 30 µg/m³ standard was exceeded on 3 days, according to Quebec’s Ministry of the Environment. On those days, Health Canada advises closing the windows and running a purifier with a high smoke CADR.
Calculate the cleaning time for my room →Every room has its own unit.
Tap a number. The air exchanger and the whole-house humidifier take care of the rest of the house.
Living room
The big room: the KCP110CW covers 538 sq ft according to AHAM, 520 sq ft under Health Canada’s rule.
See the KCP110CW →Quiet at night, under $30 a year at medium speed.
Noise at each speed, then what the unit costs if it runs 24 hours a day.
Noise, speed by speed
Both Sharp units go down to 21 dB in Sleep mode. Sharp: spec sheet; GREE: AirGreen product sheet (4 speeds).
Watts × 24 h × 365 × 11.142 ¢/kWh (Rate D, 2nd tier): a maximum.
Power at each speed: Sharp spec sheet. Standby: 0.7 W.
Watts × hours × 365 × 11.142 ¢/kWh (Hydro-Québec, Rate D, 2nd tier, as of April 1, 2026). At most: the 1st tier costs less.
Sharp and GREE, explained. And what to replace, when.
Who makes them, what they do, the part numbers.
Sharp
Two towers that purify and humidify, controlled with the Sharp Air app, Alexa or Google. According to Sharp, more than 100 million Plasmacluster units sold (2022).
GREE
A compact purifier for a bedroom or an office: pre-filter, HEPA, washable activated carbon and catalytic filter, four speeds and a 24-hour timer.
Microscreen pre-filter
WashableIt catches dust and hair. Wash it as the manual says.
True HEPA filter
FZ-P11HFUUp to 2 years depending on the environment (Sharp). The Sharp Air app shows the filter status.
Activated carbon filter
FZ-J80DFUUp to 2 years depending on the environment (Sharp). It helps with everyday odours.
Humidifying filter
FZ-P11MFUReplace it as the manual says, depending on water hardness. Empty the 0.53 gal tank off-season.
Part numbers for both Sharp units (KCP110CW and KCP70CW). GREE: washable pre-filter and carbon according to our product sheet. We order the original filters for you.
Six common beliefs about purifiers. Test yourself.
Answer: the explanation appears with its source.
Answers to the questions we get asked.
Type a word: the list filters itself.
Health Canada recommends a smoke CADR at least equal to two-thirds of the floor area. The KCP110CW (smoke CADR 347) is suited up to 520 sq ft, the KCP70CW (255) up to 382 sq ft. The manufacturer recommends the GREE up to 220 sq ft.
Clean Air Delivery Rate: the flow of clean air the unit delivers, measured at maximum speed for smoke, dust and pollen. The higher the number, the larger the room can be.
High-efficiency particulate air. The true HEPA filter in the Sharp units captures 99.97% of particles 0.3 µm and larger in the air that passes through it.
Yes, that’s the case Health Canada describes: choose the highest smoke CADR possible, keep doors and windows closed and let the unit run.
No. Carbon helps with some odours, with no standard rating for gases, and a purifier deals with neither carbon monoxide nor radon (Health Canada).
They do different things. The exchanger replaces the air in the whole house with outdoor air; the purifier cleans the air in one room. Health Canada puts ventilation and removing sources first.
In winter, heated air gets dry. The Sharp KCP110CW and KCP70CW purify and humidify at the same time, up to 500 and 400 sq ft. Health Canada aims for 30 to 50% humidity.
At Hydro-Québec’s Rate D (11.142 ¢/kWh at most), a KCP110CW at medium speed, 24 hours a day, costs about $26 a year. At maximum speed, about $92.
On the Sharp units, the HEPA filter and the carbon filter can last up to 2 years depending on the environment; the pre-filter is washable. We give you the part numbers.
Fill in the form at the top of the page or call 514-316-2973. An advisor calls you back with the price and helps you choose.
Breathe better this week.
Tell us the room and what bothers you: smoke, pollen, pets, dry air. We call you back with the price and the right model, Sharp or GREE. And if it’s the whole house that needs fresh air, we come and assess it for free.
Montreal and Laval 514-316-2973 · South Shore 514-316-3007 · sales@airgreen.ca
The people who answer your call and the people who come to your home.
Sources checked October 1, 2026.
- Health Canada, Using a portable air cleaner to improve indoor air, modified December 24, 2021: two-thirds rule, ozone, gases, CO and radon, closed doors.
- Sharp Canada, KCP110CW and KCP70CW product pages (sharp.ca): CADR, AHAM room sizes, humidification, filters, Sleep mode noise, ENERGY STAR. Sharp spec sheet published by FilterDepot.ca: noise, watts, weight, part numbers.
- Sharp, press releases of March 9, 2022 (100 million Plasmacluster units since 2000) and September 15, 2022 (founded in 1912).
- U.S. EPA, Particulate Matter Basics and Guide to Air Cleaners in the Home: size of a hair, PM2.5, definition of CADR.
- MELCCFP, Influence des feux de forêt de l’été 2023 sur la qualité de l’air au Québec: Montréal – York/Roberval station.
- Hydro-Québec, Rate D as of April 1, 2026: 11.142 ¢/kWh above 40 kWh per day.
- AirGreen product sheet for the GREE purifier (floor area, power, noise, dimensions).
Cleaning times and electricity costs: AirGreen calculations, for guidance only (well-mixed room, maximum speed). Claims about Plasmacluster technology are Sharp’s.
