 |
Installed HEPA Systems Sizing Chart |
|
1000
sqft |
1500
sqft |
2000
sqft |
2500
sqft |
3000
sqft |
3500
sqft |
4000
sqft |
4500
sqft |
5000
sqft |
|
|
AWW-350 |
2.63
ACH |
1.75
ACH |
1.31
ACH |
.95
ACH |
.88
ACH |
.75
ACH |
.66
ACH |
.58
ACH |
.53
ACH |
AWW-675 |
5 ACH |
3.4 ACH |
2.5 ACH |
2 ACH |
1.69 ACH |
1.45 ACH |
1.27 ACH |
1.13 ACH |
1 ACH |
|
8500 |
6.4
ACH |
4.25
ACH |
3.2
ACH |
2.6
ACH |
2.1
ACH |
1.8
ACH |
1.6
ACH |
1.41
ACH |
1.27
ACH |
7500 |
7.5 ACH |
5 ACH |
3.7 ACH |
3 ACH |
2.5 ACH |
2.1 ACH |
1.87 ACH |
1.66 ACH |
1.5 ACH |
10000 |
7.5 ACH |
5 ACH |
3.7 ACH |
3 ACH |
2.5 ACH |
2.1 ACH |
1.87 ACH |
1.66 ACH |
1.5 ACH |
* Calculations based on homes with 8 ft ceilings.
** Formula: ACH = CFM of unit x 60 (minutes in an hour) divided by the
area of room divided by the room height
The above sizing chart is a guideline only.
Although there is no exact sizing formula for HEPA filters, you should keep a couple of points in mind.
- Generally speaking, the more air changes per hour (ACH) you can have, the more effective a HEPA filter can be.
- There are no guidelines as to how many ACH you should provide, but as a rule of thumb, 1 ACH provides excellent air cleaning results. However, you can also get very good results at .5 ACH depending on your preferences, house, etc. As a matter of fact, a HEPA filter performing at .5 ACH will produce better results than most other air cleaning devices on the market. This is important to know because often budget plays an important role when purchasing a HEPA filter.
- People with sensitivities (allergies/asthma) may require an ACH of 2 or higher
- Remember: More HEPA is better than less, but some HEPA is better than nothing at all.