AC Infinity CLOUDLINE A4

Last updated: November 9, 2026

AC Infinity CLOUDLINE A4
2.8/5#6 of 7 in 4 in duct fans
2.8

The budget member of the CLOUDLINE 4 in range, with the same controller and build but less airflow than the S4. Worth it for its higher static pressure behind a small carbon filter.

  • 165 CFMAirflow
  • 35 WPower
  • 29 dBANoise
  • ECMotor
Check price at Amazon$79.99

Price checked November 8, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros
  • Ten-speed controller included, and it plugs into AC Infinity’s smart controllers later
  • Among the quietest fans of its size at full speed (29 dBA rated)
Cons
  • Draws more power per CFM than the most efficient fans its size

The AC Infinity CLOUDLINE A family

Every AC Infinity CLOUDLINE A model we rank, smallest first. Ratings compare each against its own duct size.

ModelAirflowRatingPrice
AC Infinity CLOUDLINE A4 (this one)165 CFM2.8/5$79.99
AC Infinity CLOUDLINE A6352 CFM3.0/5$89.99
AC Infinity CLOUDLINE A8724 CFM2.7/5$139

How it scores

The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its duct size. How we rank explains each one.

Specifications

Model numberAI-CLA4
Performance
Duct size4 in
Rated airflow165 CFM
Static pressure (not scored)324 Pa
Power at full speed35 W
Power figureMax power draw
Average power (not scored)18 W
Airflow per watt4.7 CFM/W
Price per 100 CFM$48.48
Noise at full speed29 dBA
Top speed2,800 RPM
Controls
MotorEC
Controller10-speed controller
Speeds10
Temperature and humidity controlNo
Phone appNo
Timer or cycle modesNo
Build
HousingPlastic
Ingress ratingIP44
Voltage100-240 V
Warranty2 years

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