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...

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CLOUDLINE S4, 4” Inline Duct Fan, Quiet & Energy Efficient, 205 CFM, 28 dBA, 24W, 11.9” x 6.9” x 9cm, Compatible with Grow Tents, AV Racks, Desktops & Laptops

Product ID: 468244427

Details

Brand
AC Infinity
Colour
blackone
Electric fan design
Exhaust Fan
Mounting type
Wall Mount
Power source
AC
Product dimensions
17.6D x 30.3W

⚡24W energy efficient

🔇28 dBA ultra-quiet

🌬️205 CFM airflow

VT62828

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Description

🌪️ Elevate your airflow game—quiet, smart, and unstoppable!

DURABLE VERSATILE - Dual ball bearings rated 67,000 hours and IP44 dust/liquid resistance for reliable, long-lasting performance.
SMART COMPATIBILITY - Seamlessly integrates with CLOUDLINE T4 and UIS smart controllers for next-level environmental control.
WHISPER QUIET POWER - Experience powerful airflow at just 28 dBA—your secret weapon for silent, efficient ventilation.
EFFORTLESS MAINTENANCE - Detachable motor box design makes cleaning and upkeep a breeze—keep your system running flawlessly.
PRECISION SPEED CONTROL - 10-speed PWM controller lets you tailor airflow perfectly to your environment, no noise spikes.

The AC Infinity CLOUDLINE S4 is a 4-inch inline duct fan delivering 205 CFM airflow at an ultra-quiet 28 dBA noise level. Powered by an energy-efficient 24W EC motor with PWM speed control, it offers 10 adjustable speeds for precise ventilation. Designed for grow tents, AV racks, and indoor cooling, it features durable dual ball bearings rated for 67,000 hours, IP44 dust and liquid resistance, and smart controller compatibility for seamless integration and optimal environmental management.

Specifications

ASIN	B07JB292JC
Air Flow Capacity	205 Cubic Feet Per Minute
Best Sellers Rank	#22,404 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #39 in Household Ventilation Fans
Blade Length	7.4 Inches
Blade Material	Plastic
Brand Name	AC Infinity
Color	blackone
Control Method	Push Button
Controller Type	Button Control
Customer Reviews	4.7 4.7 out of 5 stars (4,045)
Electric Fan Design	Exhaust Fan
Finish Type	Powder Coated
Global Trade Identification Number	00819137020290
Included Components	Cord
Indoor Outdoor Usage	Indoor
Installation Type	Versatile Mounting (Horizontal or Vertical)
Is Product Cordless	No
Item Dimensions D x W x H	17.6D x 30.3W x 18.8H centimeters
Item Weight	2.61 Kilograms
Manufacturer	AC Infinity
Material	Tin, Pe
Model Name	CLOUDLINE S4
Model Number	CTR62A
Motor Type	EC motor
Mounting Type	Wall Mount/Ceiling Mount
Noise Level	28 Decibels
Number of Blades	10
Number of Packs	1
Number of Power Levels	10
Number of Speeds	8
Part Number	AI-CLS4
Power Source	AC
Recommended Uses For Product	Cooling
Room Type	Indoor
Size	9 x 19 x 30 cm
Special Features	Programmable
Speed	2800 RPM
Standby Power Shutoff	Alta eficiência
Style	Cloudline S4
UPC	819137020290
Unit Count	1 Count
Voltage	240 Volts (AC)
Wattage	21 watts

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VT62828

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vanuatu.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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