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: 185719628

Details

Brand
AC Infinity
Color
Black
Connector Type
Reducer
Exterior Finish
Zinc
Item Weight
0.34 Kilograms
Manufacturer
AC Infinity

📏6" to 4" duct size adapter

🔥High-temp zinc coating finish

🛡️Galvanized steel corrosion-resistant body

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€ 61.26

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Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔗 Connect with Confidence — Upgrade Your Ventilation Game!

COMPACT SLEEK - 5.11-inch length with a zinc-coated finish blends durability with professional aesthetics.
SECURE GRIP DESIGN - Raised lips on smaller opening ensure a tight, slip-resistant fit with ducting or equipment.
VERSATILE APPLICATION - Perfect for grow tents, bathroom fans, dust collectors, and kitchen ventilation systems.
SEAMLESS AIRFLOW CONNECTION - Optimizes ventilation efficiency by bridging different duct sizes without airflow loss.
DURABLE GALVANIZED STEEL BUILD - Engineered to resist corrosion and withstand high temperatures for long-lasting performance.

The AC Infinity Duct Adapter efficiently adapts 6-inch to 4-inch duct openings, crafted from corrosion-resistant galvanized steel with a zinc coating to endure high temperatures. Its raised lip design ensures a secure fit, making it ideal for HVAC, grow tents, bathroom fans, and dust collection systems, delivering reliable airflow performance and durability.

Specifications

ASIN	B0842XMBYC
Best Sellers Rank	#37,073 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #51 in HVAC Ducting
Brand Name	AC Infinity
Color	Black
Connector Type	Reducer
Customer Reviews	4.5 4.5 out of 5 stars (1,282)
Exterior Finish	Zinc
Item Weight	0.34 Kilograms
Manufacturer	AC Infinity
Manufacturer Part Number	AC-SDR64
Material Type	Galvanized Steel
Model Number	AC-SDR64
Number of Pieces	1
Size	6" to 4"
UPC	819137021334
Unit Count	1 Count

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