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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AC Infinity Duct Adapter, 6” to 4” Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems

AC Infinity Duct Adapter, 6” to 4” Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems

Product ID: 370867944

Details

Brand
AC Infinity
Colour
Black
Connector type
Adapter
Material
Zinc-coated
Size
6" to 4"

📏6" to 4" duct size adapter

🔥High-temp corrosion resistance

🛡️Galvanized steel with zinc coating

€ 112.46

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Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Upgrade your airflow game with precision and durability!

ENHANCED GRIP DESIGN - Raised lips ensure a secure, slip-free connection with your ducting or equipment.
SEAMLESS SIZE TRANSITION - Effortlessly adapts 6" ducts to 4" for perfect airflow integration.
DURABLE ZINC COATED STEEL - Built to resist corrosion and withstand high temperatures for long-lasting performance.
OPTIMIZED AIRFLOW EFFICIENCY - Maintains your system’s CFM by preventing leaks and pressure drops.
VERSATILE VENTILATION SOLUTION - Ideal for grow tents, bathroom fans, dust collectors, and kitchen vents.

The AC Infinity Duct Adapter is a robust 6" to 4" galvanized steel reducer designed to connect different sized duct openings seamlessly. Featuring a zinc coating for corrosion and heat resistance, it ensures secure airflow with raised lips for extra grip. Perfect for enhancing ventilation efficiency in grow tents, bathrooms, kitchens, and dust collection systems.

Specifications

ASIN	B0842XMBYC
Best Sellers Rank	#54,823 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #81 in Heating & Cooling Ducting Products
Brand	AC Infinity
Brand Name	AC Infinity
Color	Black
Colour	Black
Connector Type	Adapter
Connector type	Adapter
Customer Reviews	4.5 out of 5 stars 1,205 Reviews
Exterior Finish	Zinc
Item Weight	0.34 Kilograms
Manufacturer	AC Infinity
Manufacturer Part Number	AC-SDR64
Material	Zinc-coated Metal
Material Type	Zinc-coated Metal
Model Number	AC-SDR64
Number of Packs	1
Number of Pieces	1
Size	6" to 4"
Thread Size	6" to 4"
Thread Type	Metric Tapered
Thread size	6" to 4"
UPC	819137021334
Unit Count	1 Count

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