What is the max temp of use for this fan? i see you said 240f, but all other manufacturers with plastic impellers say max temp 140f. are you certain?

Always stay a minimum of 25% below specified temp. At minimum they can warp and and motor performance would be affected

If powered from a switched outlet, will it remember the last speed setting or does that require constant power?

Morning RS, the S4 will not remember your fan speed. It’s a manual setting only. I also have a T4 with a smart controller and it does remember and can be set to auto for heat and humidity. The T4 is for auto exhaust and S4 is intake. If it is your only fan go with the T4. Also, if you have more than 200sf to ventilate go directly to the T6. The are very quiet which is important as my room is under a bedroom. Hope this helps.

How well does this work with a carbon filter?

I have a 350 Cfm Coco/Carbon Fiber filter that I place on the Exit side of my application. I have tested the filter on both the intake and the exit. I found these units Push much better than they Pull. I do have to increase the power by 10% when I install the exit filter, but it's not really an issue in my application.

What is the best way to connect this to 12 or 24 volt system?

AC infinity, also looking for DC system compatibility off grid use with solar and lithium battery banks. Want to avoid DC->AC->DC to save wattage. I like that your fan design is efficient, but not in my case as the conversion costs wattage/heat. Ended up buying Atwood unit which does 12/24v which is no where near as nice a fan as this...

AC Infinity CLOUDLINE PRO S4, Quiet 4” Inline Duct Fan with Speed Controller – EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

AC Infinity CLOUDLINE PRO S4, Quiet 4” Inline Duct Fan with Speed Controller – EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

产品编号: 551898487

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细节

Brand
AC Infinity
Colour
Pro Speed
Electric fan design
Exhaust Fan
Mounting Type
Wall Mount
Power Source
Corded
Product Dimensions
17.5D x 18.8W

🔇28 dBA noise - whisper-quiet operation

⚙️8-speed PWM EC motor - precise, energy-efficient control

🌬️205 CFM airflow - powerful ventilation

描述

🌿 Elevate your air game—quiet, smart, and built to last.

WHISPER QUIET POWER - Experience robust 205 CFM airflow with barely-there 28 dBA noise—your space stays fresh without the buzz.
PRECISION SPEED CONTROL - 8-speed PWM-controlled EC motor lets you dial in airflow perfectly, optimizing comfort and energy use.
DURABLE DUAL BALL BEARINGS - Engineered for longevity with 67,000-hour rated dual ball bearings, ensuring reliable performance in any mounting position.
MIXED FLOW DESIGN FOR HIGH RESISTANCE - Advanced stator blades and hydrodynamic wind circles maintain airflow even in challenging duct setups.
SMART COMPATIBILITY EASY MAINTENANCE - Seamlessly integrates with CLOUDLINE T-series smart controllers; detachable motor box simplifies cleaning and upkeep.

The AC Infinity CLOUDLINE PRO S4 is a premium 4-inch inline duct fan designed for professional-grade ventilation in grow tents, AV racks, and home climate control. Featuring a PWM-controlled EC motor with 8-speed settings, it delivers 205 CFM airflow at an ultra-quiet 28 dBA noise level. Its mixed-flow design and dual ball bearings ensure efficient performance and durability, while smart controller compatibility and easy maintenance make it a top choice for millennial professionals seeking reliable, energy-efficient air circulation solutions.

规格

ASIN	B07JB292JC
Air Flow Capacity	205 Cubic Feet Per Minute
Best Sellers Rank	#17,544 in Garden & Outdoors ( See Top 100 in Garden & Outdoors ) #7 in Ventilation Equipment
Blade Length	7.4 Inches
Blade Material	Plastic
Brand	AC Infinity
Brand Name	AC Infinity
Cable Length	144 Inches
Collection Name	Channel Fans
Colour	Pro Speed Controller
Control Method	App
Controller Type	Button Control,Remote Control,App Control
Customer Reviews	4.6 out of 5 stars 3,666 Reviews
Electric Fan Design	Exhaust Fan
Electric fan design	Exhaust Fan
Finish Type	Matte
Global Trade Identification Number	00819137020290
Included Components	Cord, Remote
Indoor Outdoor Usage	Indoor
Is Product Cordless	No
Item Dimensions D x W x H	17.5D x 18.8W x 30.2H Centimeters
Item Weight	2.61 Kilograms
Manufacturer	AC Infinity
Material Type	Polycarbonate
Model Name	CLOUDLINE S4
Model Number	CLOUDLINE S4
Mounting Type	Wall Mount/Ceiling Mount
Noise Level	28 Decibels
Number Of Speeds	8
Number of Blades	10
Number of Power Levels	10
Power Source	Corded Electric
Power Source Type	Corded Electric
Product Dimensions	17.5D x 18.8W x 30.2H Centimeters
Recommended Uses For Product	Air Circulation, Cooling
Room Type	Kitchen
Special Features	Bladeless
Speed	2800 RPM
Standby Power Shutoff	High
Style	Modern
Style Name	Modern
Switch Type	Push Button
UPC	819137020290
Unit Count	1.0 Count
Voltage	240 Volts
Wattage	21 Watts

D**N

静かですが

パワー感は、どうかな？と、いった感じです。

29.11.2021

U**H

Good service and product

12.03.2026

A**N

They care about every detail

7.12.2025

J**N

Great fan!

2.11.2020

R**T

The Rolls-Royce of exhaust fans

8.12.2023

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