CALCULATE YOUR WAY TO CLEAN AIR!
Calculator 1: Use this if you want to work out the true cost of clean air or calculate how many air changes per hour you get from your air purifier?
Calculator 2: Use this if you want to compare up to 3 air purifiers to help you decide which is the most cost-effective for your space.
If you are looking to purchase for a school and need a set number of air changes per hour according to ASHRAE or NEU standards, download our Excel calculator (3). It has the detail you need to tell you what speed you can run each purifier on to meet the max noise level for our class.
1. Air Change per Hour (ACH) calculator
โNB: If you have 3 CADR numbers for Dust, Pollen & Smoke, use the lowest which is Smoke or Formaldehyde.
RESULT ONE: Volume of clean air for every ยฃ spent on your purifier
RESULT TWO: No of Air Changes per Hour (ACH) for your room size
RESULT THREE: Time it takes to clean the air at that setting (if you only have one CADR, this will be for the highest setting only)โ
2. Compare cost effectiveness of air purifiers
Using a room size of 15m2, you can compare up to 3 purifiers to find out what volume of clean air you get for every ยฃ spent on this purifier. This calculator lets you see the true cost of clean air. โ
NB: If you have 3 CADR numbers for Dust, Pollen & Smoke, use Smoke.
3. Total CADR you for 5-6 air changes per hour
Total CADR based on needing 3 ACH (homes) to 6 ACH (classrooms).
Note that most CADR figures are given on top settings which may be too loud for most homes/classes.
We provide data for our air purifiers on all settings:
The Smart Air family
| Air Purifier |  Sqair |  SA600 (5-speed) |  Blast Mini Mk II |  Blast Mk II |  SA700 |
| Speed | 1 - 2 - 3 | 1 - 2 - 3 - 4 - 5 | 1 - 2 - 3 | 1 - 2 - 3 | 1 (on/off) |
| CADR (mยณ/h) | 65 - 180 - 315 | 125 - 180 - 240 - 320 - 500 | 340 โ 450 โ 740 | 450 โ 680 โ 950 | 490 |
| Noise (dBA) | 23 - 43 - 52 | 24 - 31 - 39 - 43 - 52 | 36 โ 43 โ 49 | 29 โ 37 โ 43 | 42 |
| Power (W) | 6 - 18 - 38 | 3 - 5 - 9 - 14 - 60 | 49 - 82 - 122 | 48 โ 81โ118 | 10 |
| Coverage (mยฒ) | 15 - 22 - 40 | 16 - 22 - 29 - 38 - 60 | 48 โ 63 โ 85 | 74 โ 99 โ 130 | 34โ60 |
| HEPA lifespan (months)** | UK: 9 months/2300 hrs (running 8 hrs per day) | UK: 12 months/3100 hrs (running 8 hrs per day) | UK: 20 months/4850 hrs (running 8 hrs per day) | UK: 33 months/8100 hrs (running 8 hrs per day) | UK: 18 months/ 4680 hrs (running 8 hrs per day) |
| Dimensions L ร W ร H (cm) | 33.3 ร 36.5 ร 36.5 | 35 ร 23.2 ร 51 | 57.5 ร 33 ร 63 | 57.5 ร 33 ร 123 | 65 x 17 x 65 |
| Warranty (years) | 1 | 1 | 2 | 2 | 1 year |
| Price | ยฃ156 - ยฃ198 | ยฃ252 | ยฃ462 - ยฃ552 | ยฃ696 - ยฃ822 | ยฃ480 |
