HEPA Scrubber Filter Life
Estimated filter days from CFM, runtime, and particulate category.
Example
You enter
- CFM 1000
- Hours per day 8
- Particulate category medium
- Job duration (days, optional) 5
- Filter cost ($, optional) 80
You get
- Estimated filter life 3.8 days
- Loading rate 400 g/day
- Capacity grams 1500
- Filters for full job (if days supplied) 2
- Total filter cost 160
Checked against published worked examples from: EPA / IICRC S520 HEPA loading practice (project bundled).
Details, formula, and sources
Formula or tablePre-filter loading: g per CFM-hour benchmarks from manufacturer technical bulletins; lifespan_hr = filter_capacity_g / (loading_rate × CFM). Particulate-load category low / medium / high adjusts the rate.
Source and editionManufacturer technical bulletins (Abatement Technologies, Phoenix, Dri-Eaz) by name; ANSI/ASHRAE 52.2 (Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size) by name.
Free accessASHRAE 52.2 read-only at ashrae.org. Manufacturer bulletins free at each manufacturer site.
What governsEstimate. AHJ and licensed professional govern.
API field namescfm, hours_per_day, particulate_category, job_days, filter_cost_usd, days, grams_per_day, capacity_grams, filters_for_job, total_cost_usd
- Loading-rate table data/restoration/hepa-loading.json keyed to particulate categorymanufacturer technical bulletins