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The truth about "Free Air" and "Boosted Air" Ratings!

As an online consumer it is important for you to understand what it is you are buying before you
purchase because you don't have the ability to actually look at the product and see it function before
hand. There are some manufactures out there who would like you to believe your buying something you
are not. As an example you may think you are buying a 500 CFM rated fan but in reality you are getting
maybe around a 210. Be sure you know the "Free Air" ratings of your duct fan before you purchase. We
explain a little more in detail below.

"Free Air" is a rating given to a fan that is not installed in a duct line. There is no restriction to airflow or
static pressure (This is the rating you would get if you simply have the fan plugged in and sitting on a
table in front of you).

"Boosted Air" is a rating given to a fan as a maximum number of CFM's the duct fan will push before it
becomes a restriction itself. It does not mean you will even come close to this "Boosted" number and it
is based on a certain number of CFM's pushing on the back end of the duct fan from your main blower in
order to help the duct fan generate more rpms thus more CFM's.

Chances are if you are having airflow problems to begin with you are not going to have alot of CFM's
pushing on the back end of your duct fan let alone enough to even get you close to the "Boosted Air"
rating you thought you were going to get. "Free air" is really the only fair way to rate these Duct fans
due to the amount of variables within each setup like duct length, 90 or 45 degree bends,how many
CFM's are pushing on the back end from your main blower and where you plan to install your duct fan.
We hope this information helps in your purchasing decisions. Please Contact us for further details if
needed.

Solid State Variable
Speed Control Switch

SAIL SWITCH
(air pressure switch)

Use some of these accessories to optimize your installation!

CF-6 MODEL 460 CFM

CF-8 MODEL 755 CFM

CF-10 MODEL 800 CFM

CF-12 MODEL 1150 CFM

Why use Aero-Flo Hydroponic Fans?
5 Year Manufacturer Warranty!!!
We show you the curve ratings! How many other sites actually show you the
performance curves? Just because it has a High CFM rating doesnt mean its going to
perform well under restrictive conditions. Be sure you know the curves before you buy!
High Output Free Air CFM's. See Below for our "Free Air" explanation!
Massive power to push past restriction.
Boost and maximize airflow from inlet or to exhaust!
Great for use as Greenhouse Fan or Hydroponic Fan!
Save energy costs by maximizing your ventilation system!
Technical assistance available anytime 866-462-1676
Dedicated customer service and sales team on hand to help you with any question or concern.

What is a Hydroponics Fan?
These fans are the best fans on the market. Able to withstand massive amounts of static pressure and
resistance to airflow these fans are the cure-all to your air ventilation problems. The centrifugal design keeps
the motor out of the air stream while pushing the air out at a fast pace. Quality product with a 5 YEAR
WARRANTY!!!

What are CFM's?
CFM stands for Cubic Feet Per Minute and in this application it is defined as a rate of airflow. Most CFM
ratings are measured in a controlled environment persuant to specific industry standards. Higher CFM ratings
do not always mean a stronger fan it simply means there is more space for the air to flow through. If you see a
425 CFM 6" Fan and compare it to a 1100 CFM 12" you think automatically the 12" is much more powerful unit
when in fact it moves at about the same RPM and reacts to restriction in much the same way as a 6 inch unit
does. The fact the 12" unit has 12 inches of free air space is the main reason it has a much higher CFM rating.

Hydroponics Fans.com is a supplier of Hydroponic Fans for
Residential,Commercial and Hydroponic applications. We
offer very competitive prices and are very focused on
customer service throughout your installations. If you need
help and cannot find the answer on our site, call us at
1-866-462-1676 or email us at sales@h ydroponics fan .com
and we will help you with anything you need!

Use some of these accessories to optimize your installation!

CF-4 MODEL 185 CFM