Patented Fan Systems. Engineered to your duty point.
Five families, 3′ to 40′ — drop-in retrofit replacements for existing cooling towers, ACHE and ACC banks. Up to 35% less fan power, +15% airflow, and the patented stealthfans™ option for sites with strict acoustic limits.
Every diameter.
Every duty point.
One retrofit solution.
From the SML at 3′ to the D Series at 40′, every AFI fan shares the same retrofit architecture: adjustable-pitch blades, quick assembly with taper bushing, corrosion-protected materials and field-tunable aerodynamics. Built to drop into your existing hub and drive.
Four engineering principles. Every diameter. Every retrofit.
Engineered to your duty point
Three to five blade profiles per family, each tuned to a specific airflow, static pressure and acoustic target — selected to match the real conditions of your equipment.
Field-adjustable pitch
Re-pitch in field with a precision setter. Duty changes, debottlenecking or seasonal swings don't force a new fan purchase.
Drop-in retrofit ready
Built around your existing hub, ring and drive system. Most retrofits installed within a single outage window — no civil work, no motor swap.
Patented low-noise option
stealthfans™ deliver very low dB(A) without sacrificing efficiency, weight or cost — the only quiet retrofit that doesn't compromise the duty point.
One fan per duty. Scroll the range.
DSeries
The flagship of the smartfans™ family. The reference fan for the largest field-erected cooling towers, ACC and ACHE banks in the world.
HDSeries
The workhorse for mid-to-large field-erected installations — the fan that bridges the gap between package equipment and flagship D Series duties.
STDSeries
The standard-bearer for package cooling towers, smaller field-erected units and compact ACC / ACHE skids — efficiency proven across thousands of installations.
SMLSeries
Compact, light and efficient — the small-diameter family for package cooling towers, dry coolers and adiabatic systems where every gram and dB counts.
STEALTHSeries
A patented low-noise fan that finally beats the trade-off — silence, efficiency and weight, all at once. The very low-noise reference from 6′ to 40′.
Less energy.
Lower emissions.
Not sure which series fits your duty point?
Send us your duty data, current fan drawings or motor specs. Our engineers return a tailored retrofit study with predicted kW savings, airflow gain and payback period.