Won't this hurt cfm's?

I used this for my smoker shed, so not sure about the cfm's

How does this effect the rated CFM?

CFM is a measure of volume over time. Any time the output is restricted (say 6" down to 4") you can expect a back pressure and a REDUCTION in CFM, even if there is an increase in velocity (speed) of the airflow. Opening back up this restriction (4" up to 6") will not necessarily increase your CFM, it just decreases the velocity of the airflow and is less restrictive. It is not possible to increase CFM in this manner, without the introduction of another fan beyond the initial restriction.

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Duct Adapter, 150mm to 100mm Ducting Reducer Increaser Cone

Product ID: 506793367

Details

Brand
AC Infinity
Colour
Black
Connector type
Adapter
Exterior finish
Zinc
Item weight
0.34 Kilograms
Material
Galvanised

📏6" to 4" duct size adapter

🔥High-temp zinc coating finish

🛡️Galvanized steel corrosion-resistant body

273 Lei

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Description

🔧 Upgrade your airflow game — connect with confidence!

SEAMLESS AIRFLOW CONNECTION - Maintain peak ventilation efficiency by bridging different duct sizes without airflow loss.
COMPACT LIGHTWEIGHT DESIGN - At just over 5 inches and 340g, it’s easy to install without bulk or hassle.
RUGGED GALVANIZED STEEL BUILD - Durable, corrosion-resistant construction designed to withstand high temperatures and daily wear.
VERSATILE VENTILATION SOLUTION - Perfect for grow tents, bathroom fans, dust collectors, and kitchen range hoods—adapt with confidence.
PRECISION FIT WITH RAISED LIP GRIP - Enhanced grip on smaller ducts ensures a secure, no-slip connection every time.

The AC Infinity Duct Adapter efficiently adapts 6-inch ducting to 4-inch openings, crafted from galvanized steel with a zinc coating for corrosion and heat resistance. Its raised lip design ensures a secure fit, making it ideal for grow tents, bathroom fans, dust collectors, and kitchen ventilation systems. Lightweight and compact, it preserves airflow efficiency while providing a durable, professional-grade solution for diverse ducting needs.

Specifications

ASIN	B0842XMBYC
Best Sellers Rank	270,992 in DIY & Tools ( See Top 100 in DIY & Tools ) 746 in Ducting
Brand	AC Infinity
Colour	Black
Connector Type	Adapter
Country of Origin	China
Customer Reviews	4.5 4.5 out of 5 stars (1,203)
Exterior Finish	Zinc
Item Weight	0.34 Kilograms
Manufacturer	AC Infinity
Material	Galvanised steel
Model Number	AC-SDR64
Number of Packs	1
Number of Pieces	1
Part Number	AC-SDR64
Size	6 Zoll bis 4 Zoll
Thread Size	6 inches to 4 inches
Thread Type	Metric Tapered
UPC	819137021334
Unit Count	1.0 count

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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273 Lei

Duties & taxes included

In stock

Sold byAmazon RomaniaDelivered 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 Romania.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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