Cannabis Smoke and Odor Calculator

Simple to use calculator for weed smoke and odor control.

Enter the room dimensions in the calculator below. This calculator asks you for number of smokers. To determine how many air purifiers needed enter your product choices as well.

If you need more help understanding your air purification needs feel free to call our customer service number for non-judgmental advice. 800558-9436 or email us sales@lakeair.com

Click to expand

Air Changes per Hour and Cubic Feet per Minute

ACH is the number of times the entire volume of air in a room is moved through the air purifier per hour. For example, an ACH of eight would mean that the entire volume of air in the room is moved through the air purifier 8 times in one hour. CFM, on the other hand, is a measure of the amount of air that the air purifier can move through itself in one minute. This indicates the air purifier’s airflow capacity and how quickly it can filter the air.

The number ACH (air changes per hour) needed to remove smoke and odor from a room is determined by the amount of smoke and odor being created. Each person smokes at a slightly different rate. The type of weed being smoked, how it is being smoked are contributing factors too. We have talked to many consumers and the numbers we use has come from customers interviews. They have estimated the level of air purification needed, and the calculator above reflects that customer input. The calculations are certainly not exact but give a good indication of air purification needs for people who smoke enjoy cannabis whether it be for recreation or medical purposes. 

What our customers have told us is that one person smoking can do well with around 8 air changes per hour.  A couple friends enjoying a joint are likely to need in the area of 12 air changes per hour.  What we find is that as you add a smoker you also add a need for 4 air changes per hour. After the 20 air changes per hour level, it seems to level off with a maximum need of 24 air changes per hour. If you would like to give us your input, just drop us a note. We are always interested in improving the information we provide.

Quick Reference guide to Pot smoke and odor removal models

The Ultimate Cannabis smoke and odor removal system is the MAX-Guard-HEPA420. This unit has the ultra 3.0  Cannablend filter. It contains over 2000 grams (4 pounds +) of pot odor absorber. The unit offers 900 CFM of circulation second only to the MAX-Guard-S420. When smoke goes in to the MAX Guard HEPA, it never comes out .


  • Unit Price $2295.00
  • Replacement HEPA #499176 $180.00 life 9-12 months
  • Replacement Carbon / Cannablend Filter #499117 $185.00 life 4-6 months
  • Save money of filters by subscribing to our subscription service.

The MAX-Guard-S420 delivers 1500 CFM of smoke and odor removal. It will do an awesome job of eliminating pot smoke from a room. A larger room is well served with this unit. The 1000-gram 2 chamber filter is one of the largest odor absorbing filters we offer. The washable filter cell helps cut down on costs by eliminating the need to buy replacement main filters.

 

  • Unit Price $2495.00
  • Electrostatic Filter (washable every 2 months)
  • Replacement Carbon / Cannablend Filter #499146 $85.00 life 3 months
  • Save money of filters by subscribing to our subscription service.

Maxum HEPA-420 is the marijuana odor-eliminating giant. It utilizes a thinner 2.6-inch HEPA filter. It has all the efficiency of any LakeAir HEPA filter, but it is thinner and therefore has a shorter replacement cycle. Heavy smokers should plan on replacing this $180.00 HEPA filter every six to 9 months.

  • Unit Price $795.00
  • Replacement HEPA #499061 $159.95 life 9-12 months
  • Replacement Cannablend Filter #499120 $89.00 life 4-6 months

The MAX-700-420 is the high power electrostatic table top model. The 650 CFM air flow is sufficient for most rooms. This unit includes a 300-gram Cannablend filter. The MAX 700 will quickly remove smoke from a room. Due to the Cannablend filter size you will want to run the unit a couple hours after smoking.

  • Unit Price $995.00
  • Electrostatic Filter (washable every 2 months)
  • Replacement Cannablend Filter #499158 $49.50 life 3 months

The Maxum-420 is our legacy model. This unit is fine for a single person in a small room. It will provide 275 CFM of air flow and decent odor control. Both the electrostatic filter and Cannablend are the same as in the MAX 700. This model uses a radial (propeller) fan. The Maxum-420 has two speeds Hi / Lo.

  • Unit Price $650.00
  • Electrostatic Filter (washable every 2 months)
  • Replacement Cannablend Filter #499158 $49.50 life 3 months