Air filtration is one of those facility essentials that’s easy to oversimplify: “buy filters, change filters.” But the facilities that get better IAQ and better operating costs usually do one thing differently — they follow a consistent, documented approach.
NAFA (National Air Filtration Association) publishes best-practice resources designed to help teams make practical filtration decisions and improve consistency across building types.
And a quick note from our side: Engineered Filtration Systems (EFS) is proud to be a 2026 Platinum Sponsor of NAFA, supporting the ongoing education and advancement of the filtration industry.
Below is a simple “playbook” you can use to build (or tighten up) a filtration program — without turning this into a textbook.
1) Start with the goal (what are you protecting?)
Most facilities filter air for one (or more) of these outcomes:
- Occupant comfort & indoor air quality
- HVAC performance and coil/equipment protection
- Critical environments (healthcare, labs, clean areas, data centers, industrial processes)
- Odors/VOCs/smoke (where molecular media may be needed)
When you define the goal first, it becomes much easier to select the right filter stages, avoid over-restricting airflow, and create a repeatable standard.
2) Build a staged strategy (instead of asking one filter to do everything)
A common best-practice approach is layered filtration:
- Prefilters to capture larger particulate and extend final-filter life
- Final filters matched to the environment and system capability
- Optional molecular media when gases/odors/smoke are part of the problem
This approach often improves consistency and can reduce the “surprise” emergency changeouts that happen when final filters load too quickly.
3) Don’t lose performance to bypass and poor fit
Even the best filter won’t perform if air goes around it. The most common issues we see:
- Gaps and poor gasket contact (bypass)
- Wrong fit or damaged frames
- Mixed filter types in the same bank
- Installation shortcuts that create uneven loading
If filters seem to load unusually fast or you’re seeing dirt downstream, it’s worth checking sealing and holding frames — not just swapping brands or efficiency ratings.
4) Standardize changeouts with a simple measurement habit
Many teams change filters by calendar or “how they look.” A more defensible approach is usually performance-based changeouts supported by routine checks.
A practical minimum tracking set:
- Filter type + install date
- Differential pressure at the bank (baseline vs. current)
- Notes on unusual events (construction, seasonal spikes, wildfire smoke, etc.)
This turns filtration into a predictable maintenance program instead of guesswork.
5) Use NAFA resources as a checklist
You don’t need to reference NAFA in every decision — but NAFA best-practice resources are useful as a framework when you’re creating standards, training staff, or aligning multiple sites on one approach.
Quick event note: see EFS at NAFA’s 2026 Technical Seminar
If you’re attending, we’d love to connect in person. The 2026 NAFA Technical Seminar is scheduled for Louisville, Kentucky with programming April 9–10.
EFS will be there as a Platinum Sponsor, and it’s a great opportunity to compare notes on filtration challenges, staged approaches, and real-world best practices.