9 Best Air Purifiers for Weed Smoke Canada 2024

What is the best air purifier for weed smoke removal?

People have been smoking cannabis for decades, even when it was illegal. With the legalization of marijuana for medical and recreational uses, it is much more common, and people can comfortably enjoy it in their homes.

Just like cigarettes, the smoke of weed lingers around and compromises the quality of indoor air. So, whether you’re smoking it for medicinal value, socialization, or relaxing, you have to deal with the smell after you have stubbed out the blunt.

Although smoking weed is now legal in many parts of Canada and the world, some people still consider it taboo. If you stay in such a neighbourhood, you might find yourself crossing paths with your neighbours.

Also, when the smoke sticks on your clothes, carpet, and upholstery, getting rid of it may require expensive expert cleaning services. People use different ways to mask or minimize the smell, for example burning incense sticks, in vain.

Fortunately, air purifiers can help you get rid of cannabis smoke. However, different air purifiers use different air purification technologies, and not all are effective for weed smoke. How will you know if a particular air purifier will work? Stick around to find out…

Best Air Purifier for Marijuana Smoke – Comparison Chart

Before we review each unit individually, below is a summary of their main features. This can help you make a quick decision as to which air purifier suits your needs:

Name	Filtration	Max coverage area	Fan speeds	Air Changes per Hour (ACH)	Weight	Dimensions (HxWxD inches)
1. RabbitAir MinusA2 (SPA-780A) (Editor's Choice)	BioGS HEPA filter, customized filter, activated carbon, ionizer	815 sq. ft.	5	2	19.4 lbs.	20 x 21.4 x 7
2. Alen BreatheSmart 45i	True HEPA (H13) filter, activated carbon	800 sq. ft.	4	2	15 lbs.	25 x 15 x 8.5
3. Rabbit Air BioGS 2.0 (SPA-625A)	BioGS HEPA filter, activated carbon, ionizer	625 sq. ft.	5	2	16.8 lbs.	22.2 x 16.6 x 9.8
4. LEVOIT LV-PUR131	True HEPA filter (H13), activated carbon	360 sq. ft.	3	4.5	11.49 lbs.	18.5 x 14.6 x 7.2
5. Molekule Air Pro	Multi-layer PECO-filter	1,000 sq. ft.	6	n/s	22.9 lbs.	23.9 x 10.9 x 10.9
6. Alen BreatheSmart 75i	True HEPA filter (H13), activated carbon	1,300 sq. ft.	5	2	27 lbs.	27 x 18.5 x 11.5
7. Coway Airmega 400	True HEPA, activated carbon	1,560 sq. ft.	4	2	24.7 lbs.	22.8 x 14.8 x 14.8
8. Levoit Core 400S	True HEPA filter (H13), activated carbon	403 sq. ft.	4	5	14.12 lbs.	20.5 x 10.8 x 10.8
9. Blueair Blue Pure 411	HEPASilent technology, activated carbon	161 sq. ft.	3	4.8	5.3 lbs.	16.7 x 8 x 8

Related: Best Air Purifiers Canada

Reviews of the Best Air Purifiers for Weed Smoke 2024

After hours of digging for information on the best air purifiers for cannabis smoke, we have narrowed it down to 9. These are the best air purifiers for weed smoke in Canada this year:

1. RabbitAir MinusA2 Ultra Quiet HEPA Air Purifier (SPA-780A) – best air purifier for weed smoke Canada

RabbitAir MinusA2 is a high-tech air purifier designed to stand alone or to be mounted on the wall. Also, it is intended to cover large rooms of up to 815 sq. ft.

The MinusA2 has the option of customized filters depending on your needs. The customized filters include germ defence filter, pet allergy filter, toxin absorber filter, and odour remover filter.

Since you want to get rid of weed smoke, we recommend the odour remover filter. Combining the HEPA, activated carbon, and odour remover filters will clear the indoor air of weed smoke in no time.

In terms of filters, it has six of them resulting in a six-stage purification system. These include a pre-filter for large particles, a medium filter that traps particles larger than 1 micron, and a BioGS HEPA filter that traps up to 99.97% of airborne particles.

Besides, you’ll have chosen a customized filter (in this case the odour remover). Also in the line-up, there is an activated carbon filter for smells and VOCs plus a negative ion generator.

Features and specs summary

• Filtration: BioGS HEPA filter, customized filter, activated carbon, ionizer
• Maximum coverage area: 815 sq. ft.
• Air Changes per Hour (ACH): 2 (every 30 minutes)
• Weight: 19.4 pounds
• CADR: smoke 180 CFM, pollen 200 CFM, dust 193 CFM
• 5 fan speeds
• Power cord length: 9.33 feet
• Power consumption: 7 to 61 Watts
• Voltage: 120V
• Filter life: 12 months
• Filter change indicator
• Noise range: 25.6 to 51.3 dBA
• Real-time air quality monitoring
• Air inlet: front
• Air outlet: back
• Dimensions (HxWxD): 20 x 21.4 x 7 inches

Pros

• Effectively gets rid of marijuana smoke
• Adaptable since it can stand alone or be mounted
• Very quiet at low fan speeds
• An excellent six-stage filtration system
• You can turn off the ionizer
• Easy to maintain since filters can last up to 2 years
• 5-year warranty

Cons

• A bit pricey

Click here to see its current price.

2. Alen BreatheSmart 45i True HEPA Air Purifier

BreatheSmart 45i by Alen cleans rooms up to 800 square feet every thirty minutes. It features four-speed fan settings, so you can set it to the highest speed if you are smoking weed indoors with a group of friends.

Besides, it uses a long-lasting HEPA filter with an activated carbon layer to eliminate weed smoke and other odours from the air. Also, the filters last up to 12 months, keeping the maintenance cost down.

The BreatheSmart 45i is designed to run 24/7 and comes with a smart sensor that indicates air quality in real-time using different colours. This feature tells if there is so much weed smoke in the air so that you can adjust the fan.

If t’s on Auto mode, however, the fan’s speed will increase automatically to remove the smoke and smell quickly.

Features and specs summary

• Filtration: True HEPA (H13) filter, activated carbon
• Maximum coverage area: 800 sq. ft.
• Air Changes per Hour (ACH): 2 (every 30 minutes)
• Weight: 15 pounds
• CADR: 245 CFM
• Power cord: 7 feet 8 inches
• 4 fan speeds
• Noise range: 23 to 49 dBA
• Power consumption: 1.1 to 50 Watts (Energy Star)
• Voltage: 120V
• Pink noise
• Filter life: 12 months
• Smart sensor with LED rings
• Dimensions (HxWxD): 25 x 15 x 8.5

Pros

• Excellent filtration system
• Long-lasting filters
• Very quiet at low fan speeds
• Perfect for small to medium-sized rooms
• Pink noise can help you sleep better at night
• Smart sensors detect the quality of air in real-time and adjust the fan speed accordingly
• Comes with a lifetime warranty showing how confident the manufacturer is

Cons

• A bit pricey

Click here to see its current price.

3. Rabbit Air BioGS 2.0 Ultra Quiet HEPA Air Purifier (SPA-625A)

This is another fantastic choice for anyone looking for the best air purifier for cannabis smoke.

Rabbit Air BioGS 2.0 has a four-stage purification process that effectively removes weed smoke from your indoor air. It features a pre-filter, HEPA filter, activated carbon filter, and an ionizer. The activated carbon filter is responsible for removing chemicals and odours from the air, including weed smoke.

Also, it has an indicator that reminds you when it is time to change the filters. This feature ensures that the filters are in good condition to get rid of weed smoke and other pollutants in the air at all times.

What’s more, it is Energy Star rated, hence uses minimum power. For heavy smokers, the purifier should run 24/7 for maximum efficiency. Therefore, you should invest in an air purifier that consumes minimal energy like RabbitAir BioGS 2.0.

Lastly, this air purifier is relatively quiet. Therefore, if you decide to smoke at night when other people are asleep, the noise will not disturb their sleep.

Features and specs summary

• Filtration: BioGS HEPA filter, activated carbon, ionizer
• Maximum coverage area: 625 sq. ft.
• Air Changes per Hour (ACH): 2 (every 30 minutes)
• Weight: 16.8 pounds
• CADR: smoke 154 CFM, pollen 180 CFM, dust 165 CFM
• 5 fan speeds
• Power cord length: 6.08 feet
• Power consumption: 5 to 39 Watts (Energy Star)
• Filter life: 12 months
• Filter change indicator
• Noise range: 22.8 dBA to 50.4 dBA
• Real-time air quality monitoring
• 4-stage filtration system
• Air inlet: bottom and sides
• Air outlet: upwards
• Dimensions (HxWxD): 22.2 x 16.6 x 9.8 inches

Pros

• Expertly removes weed smoke
• Energy efficient (Energy Star rated)
• Quiet operation especially at low fan speeds
• It has a filter change indicator
• Eye-catching design
• Slightly cheaper than RabbitAir MinusA2
• You can switch off the ionizer
• It has a long warranty (5 years)

Cons

• Relatively noisy at high fan speeds

Click here to see its current price.

4. LEVOIT Air Purifier for Home (LV-PUR131)

LV-PUR131 air purifier covers an area of up to 360 square feet, so it is not ideal for large rooms. However, it has an amazing filtration system that gets rid of all weed smoke from the house in no time.

A pre-filter, a HEPA filter, and an activated carbon filter work together to ensure that weed smoke inside your house or from the neighbour is removed from the air. Also, it can serve as an air purifier for removing kitchen smells thanks to the activated carbon.

Besides that, it efficiently removes other airborne particles such as dust and pollen.

This LEVOIT Air Purifier has three fan speeds and a smart sensor. Therefore it can automatically adjust the fan speed in response to the real-time air quality readings in smart auto mode.

What’s more, it has a Sleep mode that puts the air purifier at the lowest speed setting and reduces fan noise to 27dB. This ensures that traces of weed smoke are eliminated from the air at night without disturbing your sleep.

Features and specs summary

• Filtration: True HEPA filter (H13), activated carbon
• Maximum coverage area: 360 sq. ft.
• Air Changes per Hour (ACH): 4.5 (13.3 minutes every hour)
• Weight: 11.49 pounds
• CADR: 135 CFM
• 3 fan speeds
• Power consumption: 0.7 to 40 Watts
• Voltage: 120V
• Filter life: 6 to 8 months
• Filter change indicator
• Timer: 2 to 8 hours
• Noise range: 27 to 52 dB
• Sleep mode
• Real-time air quality indicator (AirSight technology)
• Dimensions (HxWxD): 18.5 x 14.6 x 7.2 inches

Pros

• Inexpensive
• Removes weed smoke quickly
• Sleep mode allows you to sleep comfortably
• You can set the timer to work as you prefer
• Attractive design
• Easy to move from one room to the other

Cons

• A bit noisy at high fan speeds
• Not ideal for large rooms

Click here to see its current price.

5. Molekule Air Pro Air Purifier with PECO Technology

Molekule Air Pro Air Purifier is designed for large spaces measuring up to 1000 square feet. So, if you are hosting a party that will involve smoking weed, this is the best air purifier to ensure that non-smokers are getting clean air all through.

The PECO technology used in this air purifier not only removes air pollutants such as marijuana smoke from the air but also destroys them. Besides, it has a sensor that detects the number of contaminants in the air according to their size and responds accordingly.

What’s more, Molekule Air Pro comes with an easy-to-use touch screen and connects to Wi-Fi. Therefore, you can control it from your smartphone from anywhere in the house via the app (both iOS and Android).

Features and specs summary

• Filtration: multi-layer PECO-filter
• Maximum coverage area: 1,000 sq. ft.
• Air Changes per Hour (ACH): not specified
• Weight: 22.9 pounds
• CADR: not specified
• 6 fan speeds
• Power cord length: 5.9 feet
• Power consumption: 26 to 123 Watts
• Noise range: 33 to 64 dBA
• iOS & Android app
• Wi-Fi connectivity
• Vegan leather handle
• Particle sensor – automatically adjusts fan speed on Standard and Quiet modes
• Dimensions (HxWxD): 23.9 x 10.9 x 10.9 inches

Pros

• Though unconventional, the filtration system is excellent
• App and Wi-Fi enabled for convenience
• It covers large rooms
• Stylish design
• Senses air particles as per their sizes and adjusts fan speed accordingly
• Comes with a reliable two-year warranty

Cons

• It’s heavy
• Expensive

Click here to see its current price.

6. Alen BreatheSmart 75i Large Room Air Purifier

Alen BreatheSmart 75i Large Room Air Purifier has a 3 stage filtration system with a pre-filter and a True HEPA filter (H13). Besides, a layer of activated carbon absorbs smoke and other toxic smells. So, weed smoke will no longer be an issue in your house.

Besides, it is ideal for small, medium, and large rooms. Although it’s a bit expensive, Alen BreatheSmart 75i is among the few air purifiers that can clean large spaces up to 1300 sq. ft. efficiently. It is capable of removing weed smoke from a one-story building with ease.

For this reason, it also features as one of the best air purifiers for large rooms in Canada.

What’s more, it operates quietly, especially at low fan speeds. It also generates a soothing pink noise to help you sleep better. Also, it features a smart laser sensor that detects air quality and passes that information through 5 colour changes.

So, you’ll always know when the smoke is too much. Besides, it automatically adjusts the fan speed as per the level of contamination when on Auto mode.

Features and specs summary

• Filtration: True HEPA filter (H13), activated carbon
• Maximum coverage area: 1,300 sq. ft.
• Air Changes per Hour (ACH): 2 (every 30 minutes)
• Weight: 27 pounds
• CADR: 347 CFM
• 5 fan speeds
• Power cord length: 7 feet
• Power consumption: 1.8 to 45 Watts (Energy Star)
• Filter life: 12 months
• Noise range: 25 dBA – 49 dBA
• Pink noise
• Smart Sensor
• Air Quality Indicator (LED colour rings)
• Dimensions (HxWxD): 27 x 18.5 x 11.5 inches

Pros

• Gets rid of weed smoke from small to large spaces effectively
• Quiet operation and soothing pink noise for better sleep
• LED rings always let you know the status of the air quality around you
• It can automatically adjust the fan speed depending on how much pollution there is
• Low power consumption
• Comes with a lifetime warranty

Cons

• It’s a bit pricey
• Filter replacement costs make it expensive to maintain in the long run

Click here to see its current price.

7. Coway Airmega 400 Smart Air Purifier

Coway Airmega 400 is designed to clean large spaces up to 1560 square feet at least two times in an hour. It uses a True HEPA filter and activated carbon to capture particles from the air, including weed smoke, pollen, dust, and other allergens.

This air purifier also has a timer that allows you to plan the hours of use. Also, it has a filter change indicator. With weed smoke, the air purifiers can get clogged faster, and it is essential to have them replaced or washed on time to maintain efficiency.

Also, Coway Airmega 400 is Energy Star rated meaning that you will not incur abnormal energy costs.

Besides, the smart Auto mode automatically adjusts the fan’s speed depending on air quality. This feature ensures that there is no weed smoke concentration indoors and also saves on energy.

Features and specs summary

• Filtration: True HEPA, activated carbon
• Maximum coverage area: 1,560 sq. ft.
• Air Changes per Hour (ACH): 2 (every 30 minutes)
• Weight: 24.7 pounds
• CADR: smoke 328 CFM, dust 328 CFM, pollen 400 CFM
• Fan speed settings: 4
• Noise level: 22 to 52 dBA
• Power consumption: 66 Watts
• Real-time air quality monitoring
• Timer: 1, 4, 8 hours
• Filter life: 12 months
• Filter change/wash indicator
• Dimensions (HxWxD): 22.8 x 14.8 x 14.8 inches

Pros

• Removes weed smoke and odour from small to large rooms and open spaces
• Automatically adjusts fan speed on Auto mode
• Low power consumption
• You can set a timer to determine how long it runs
• Low noise at low fan speeds allows you to sleep well at night

Cons

• A bit pricey

Click here to see its current price.

8. Levoit Core 400S Air Purifier

Levoit VeSync Core 400S Smart True HEPA Air Purifier balances performance and price to stake a claim as one of the best air purifiers for weed smoke in Canada.

It is designed to clean small to medium rooms up to 403 square feet. Also, it features the powerful VortexAir technology that takes in air 360 degrees. So, irrespective of the number of people smoking weed, you can be sure that the smoke will not be left lingering around.

Thanks to a superior filtration system, marijuana smoke, dust, pollen, and other airborne particles are efficiently captured. A True HEPA filter (H13) with HEPASmart technology combines with an activated carbon filter to ensure that no pollutant is blown back into the air.

If you are constantly smoking, set your Levoit Core 400S to Auto mode and relax, knowing that it will clean the air when it detects an increase in weed smoke. Also, it operates silently so that you get to breathe better at night without much disturbance.

For chain smokers, an air purifier should run 24/7, which raises concerns about energy bills. However, Levoit Core 400S operates at 38W on maximum power, which is very economical.

Features and specs summary

• Filtration: True HEPA filter (H13) with HEPASmart technology, activated carbon
• Maximum coverage area: 403 sq. ft.
• Air Changes per Hour (ACH): 5 (every 12 minutes)
• Weight: 14.12 pounds
• CADR: 260 CFM
• Fan speeds: 4
• QuietKEAP technology
• Noise range: 24 to 52dB
• Power consumption: 2 to 38 Watts
• Voltage: 120V
• Real-time air quality monitoring
• Timer & scheduler
• Filter life: 6 to 8 months
• Filter life monitoring
• ARC formula for odours
• Pet-lock button
• VortexAir technology
• AirSight Plus technology (laser sensor)
• Air quality indicator rings
• App and voice control
• Sleep mode
• A PM2.5 display shows the number of airborne particles
• Dimensions (HxWxD): 20.5 x 10.8 x 10.8 inches

Pros

• Removes cannabis smoke efficiently
• Low power consumption
• It’s quite affordable and easy to use
• Very quiet especially at low fan speeds
• Stylish design
• Easy to move from one location to the next
• Smart operation – you can use the VeSync app or voice commands via Alexa or Google Assistant
• You can set it to work at your preferred time and for a specified duration
• Automatically senses dirty air and adjusts the fan accordingly
• Two-year warranty

Cons

• Not ideal for large rooms

Click here to see its current price.

9. Blueair Blue Pure 411 Auto Small Room Air Purifier

Blueair is a respected air purifier brand. The Blue Pure 411 is a compact, stylish, effective but affordable air purifier perfect for small rooms measuring up to 161 square feet. Due to its capacity, however, it is not adequate for rooms with very high smoke concentrations or large spaces.

It features a three-stage filtration system with a pre-filter to remove large air particles and HEPASilent technology that comprises a particle filter and activated carbon for smoke, odours, and VOCs.

Also, as it cleans the air, it’s so quiet you’ll barely notice it – even at high fan speeds. However, it does not have a smart sensor, touch screen, or timer though that should not be a deal-breaker for the service you get at a minimal cost.

Features and specs summary

• Filtration: a combination particle (HEPASilent technology) and activated carbon filter
• Maximum coverage area: 161 sq. ft.
• Air Changes per Hour (ACH): 4.8 (every 12.5 minutes)
• Weight: 5.3 pounds
• CADR: smoke 105 CFM, dust 120 CFM, pollen 120 CFM
• Fan speeds: 3
• Noise level: 17 to 46 dBA
• Power consumption: 1.5 to 10 Watts
• Filter life: 6 months
• Filter change indicator
• 360-degree air intake
• Air outlet: top
• Single-button design
• Automatically dims LED light
• Dimensions (HxWxD): 16.7 x 8 x 8 inches

Pros

• Modern, sleek design
• Excellent filtration system
• Compact and lightweight hence easy to move
• Low power consumption
• Very easy to use
• It’s not expensive
• Runs quietly even at the highest fan speed
• Perfect for small rooms and home offices
• You can change the pre-filter to match your décor
• You can register for a 2-year warranty

Cons

• Not suitable for large rooms
• No air quality display

Click here to see its current price.

How to Choose the Best Air Purifier for Cannabis Smoke

The market is flooded with air purifiers, so finding the best one to tackle weed smoke can be challenging. If you are in the process of getting one, below are essential factors to consider when shopping:

Type of filter

For effective removal of weed smoke, choose an air purifier with a HEPA filter and activated carbon. The smelliest particles of weed are around 0.3 to 2.5 microns, and HEPA filters are the best for capturing such.

Activated carbon filters, on the other hand, adsorb contaminants like smells, gases, and VOCs (volatile organic compounds). Therefore, when paired with the HEPA filters, weed smoke will not have a place in your house.

Also, ensure that the air purifier has a pre-filter to remove large air particles to prevent the HEPA filter from clogging faster.

Airflow

Weed smoke is light and easily sticks on fabric and carpet. Therefore, you need an air purifier with multiple speed settings. This allows you to regulate the amount of air input depending on the amount of weed smoke in the air.

CADR rating

How quickly does the air purifier get rid of weed smoke?

Clean Air Delivery Rate (CADR) measures how an air purifier is effective in removing air pollutants per minute. The ratings are estimated depending on the size of air particles, represented by dust, pollen, and smoke.

Since you are dealing with weed smoke, ensure that you choose an air purifier with high smoke CADR.

ACH rating

Air Changes per Hour (or Air Exchanges per Hour) simply indicates how many times per hour the air purifier cleans the entire room. So, this is a very important factor to consider if you consume marijuana.

Go for an air purifier that has a high ACH (3 to 5). However, remember to note the room size used to arrive at the ACH figure. If your rooms are larger, you will get a lower output and vice versa.

For example, if an air purifier changes air twice per hour in a 500 sq. ft. room and yours measures 1,000 sq. ft., you’ll only get one air change per hour.

On the other hand, if an air purifier has an ACH rating of 2 for a 1,000 square-foot room and yours measures 500 sq. ft., it means you will get 4 air changes per hour – which is pretty good for weed smoke removal.

Room size

Air purifiers are designed to cover different-sized rooms. Some are effective for 100 square-foot rooms while others work for rooms larger than 1000 square feet. Therefore, be sure to consider the size of your rooms and the area the air purifier can cover before you pay for it.

Portability

Unless you have a specific room where you enjoy a few marijuana puffs, consider buying an air purifier that is light and compact. This way, you can easily move it from one room to the other. Besides, it can be quite expensive to buy an air purifier for each room.

Price

As with any other purchase, always buy something that is within your budget. If the one you like is beyond what you had planned to spend, you can always save up for a few more weeks.

There’s no need of buying something cheap that will fail you or one that you’ll always feel the urge to replace.

FAQs

Before we wrap up, here are a few frequently asked questions about marijuana and the best air purifiers for weed smoke in Canada:

• When was cannabis legalized in Canada?

Marijuana was made legal in Canada on October 17, 2018, after the Cannabis Act was passed.

• What is the legal age for smoking weed?

Across Canada, you can consume marijuana if you are 19 years old and above. However, there are a couple of exceptions – the legal age in Quebec is 21 and that of Alberta is 18.

• Which other countries have legalized marijuana?

Apart from Canada, weed is now legal in over 30 countries. Some of the countries include the Netherlands (of course you know about Amsterdam!) the US, Jamaica, Mexico, Belgium, Italy, Spain, Switzerland, etc.

Even though the use of cannabis is allowed in these countries, you need to go into specific details to find out which states/provinces have passed the necessary laws. Also, you need to find out the legal age for the consumption of weed in each specific country or state/province.

• What is the best air purifier for weed smoke?

Currently, based on our research, the best air purifier for cannabis smoke in Canada is RabbitAir MinusA2 Ultra Quiet HEPA Air Purifier (SPA-780A).

• What is the most important factor to consider when looking for an air purifier that can remove weed smoke?

The most important part of a functioning air purifier is the filter. So, look out for one with excellent filtration. Activated carbon filters are very good at trapping smoke particles and odours.

Also, ensure that the air purifier has a HEPA or True HEPA filter because you need to remove other pollutants from the air. HEPA filters capture up to 99.97 percent of airborne particles such as dust, pollen, and other allergens.

Conclusion

Smoking weed can be a good time with friends, but you must be aware of the side effects of the smoke to you and non-smokers in the house. Excessive smoke in the house could result in respiratory health issues, besides leaving behind a foul smell.

The good news is that you can get rid of weed smoke using air purifiers. However, not all air purifiers are effective for weed smoke.

The best air purifier for marijuana smell must have a good filtration system comprising HEPA and activated carbon. With the guide and review above, you should be able to choose the best one for your home or office.

In summary, these are the best air purifiers for removing weed smoke in Canada 2024:

1. RabbitAir MinusA2 Ultra Quiet HEPA Air Purifier (SPA-780A)
2. Alen BreatheSmart 45i True HEPA Air Purifier
3. Rabbit Air BioGS 2.0 Ultra Quiet HEPA Air Purifier (SPA-625A)
4. LEVOIT Air Purifier for Home (LV-PUR131)
5. Molekule Air Pro Air Purifier with PECO Technology
6. Alen BreatheSmart 75i Large Room Air Purifier
7. Coway Airmega 400 Smart Air Purifier
8. Levoit Core 400S Air Purifier
9. Blueair Blue Pure 411 Auto Small Room Air Purifier

Here are a few more tips on how to get rid of weed smell quickly (YouTube video by Angela Brown Cleaning):