I am glad that I bought this fan. I was worried that for the low price it would be junk, but it is not. The housing is good quality and it moves a lot of air. No problems with it yet.
Compared to some of the 6" sunleaves wind tunnel fans I have this is all most just as nice. The hydrofarm fan is wired externally, is a little less bulky and is a little quieter than a wind tunnel. It has very basic mounting brackets compared to the wind tunnel. The wind tunnel also comes with rubber washers for quieter operation when you mount it to a wall or the ceiling. In my opinion I felt the washers do not help with noise coming through the floor. I now hang all my fans with bungee cords and have no noise coming through the floor. In my case the mounting brackets are pointless and I do not use them.
If this fan lasts, it is a great buy. I found this fan at almost half the price as the 6" wind tunnel. It has performed equally with the wind tunnel and I like the design better. The external wiring could be a pro or con. If it was wired internally it would be perfect for me, but it also leaves an easy option for direct wiring to anyone who may want that.
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From the manufacturer
Hydrofarm - Tools for growing
Hydrofarm is the nation’s oldest wholesaler and leading manufacturer of hydroponics equipment and high-intensity grow lights.
Our products incorporate only premium quality components, and our professional-grade hydroponics and UL-listed lighting fixtures give you years of dependable service.
Active Air Inline Duct Fans
With a full line of fans to meet your needs, Active Air Inline Duct Fans offer innovation and performance at a great price.
- Durable ceramic-coated metal housing
- UL-recognized components
- High quality molded impeller
- Low noise output
- Thermally-protected AC motor
- Includes mounting brackets and 8 foot pre-wired 120V cord
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Active Air Fan Speed AdjusterDesigned especially for centrifugal fans, this unit correctly and precisely adjusts fan speed without causing the motor to hum. Helps prevent damage to fan motors, ensuring longer life for the motor. More sensitive than any other unit on the market, it is compact and built to last. |
Active Air 16" Heavy Duty Metal Wall Mount FanCommercial-grade quality and industrial-strength steel combine to provide superior air circulation and durability to handle the toughest environments. The Active Air Heavy Duty 16" Wall Mount Fan is whisper quiet and easily attaches to your wall with a simple bracket. Featuring variable speeds, solid-state speed controller, side-to- side oscillation, and tilting head to direct air where you need it most. |
Active Air DehumidifiersThe new Active Air Dehumidifiers are designed to provide optimal and superior humidity control in your growing environment. Choose from 45P and 95P models, both of which provide high performance, reliability, and precise digital control where you need it most. Enjoy the reliability of improved performance with the new dehumidifier series from Active Air. |
Compare with similar items
This Item  Hydrofarm Active Air ACDF6 6" Inline, 400 CFM Duct Fan |  |  |  |  |  | |
| Price | $126.18 | -10% $26.99 Typical: $29.99 | $64.99 | $58.99 | $62.68 | $99.99 |
| Delivery | Get it as soon as Tuesday, Apr 30 | Get it as soon as Tuesday, Apr 30 | Get it as soon as Wednesday, May 1 | Get it as soon as Wednesday, May 1 | Get it as soon as Friday, May 3 | Get it as soon as Tuesday, Apr 30 |
| Customer Ratings | ||||||
| Noise level | ||||||
| Temperature Control | ||||||
| Value for money | ||||||
| Easy to install | ||||||
| Suction power | ||||||
| Sold By | Amazon.com | HGinline | ToolazyDirect | Amazon.com | Amazon.com | HGinline |
| material | metal housing | Plastic | — | Plastic | Copper | Plastic |
| controller type | Button Control | Button Control | Button Control | Button Control | Button Control | Button Control |
| wattage | 115 watts | — | 50 watts | 70 watts | 60 watts | 110 watts |
| voltage | — | 240 volts | 220 volts | — | 120 volts of alternating current | 120 volts |
| number of blades | 3 | 10 | 10 | — | 4 | 10 |
| weight | 5.23 pounds | — | 5.9 pounds | 3.06 kilograms | 6.5 pounds | 2.31 kilograms |
Reviews with images
May be Part of a Quality Solution (four stars)
The Active Air 6-inch inline fan is extremely well built, but quite difficult to use as a heat duct booster. If you just want to move a lot of air through a 6-inch duct, it will do the job extremely well. But as part of a furnace heating system solution, it will require a lot more than what's in the box. That is the only reason I will not give it five stars.First it comes with no means to make it turn on with the furnace blower. It would be idiotic (for me) to run it all the time. As an engineer, I had no problem wiring it to the high heat and neutral connections on the furnace and installing an external outlet for it to plug into; most users would not have those skills. Before doing so, I checked the maximum furnace blower demand and determined that using any furnace blower speed less than the maximum left plenty of unused amperage for the inline fan's maximum of less than one amp draw. Additionally the entire maximum furnace amperage was less than 8 amps and all the furnace control switches were rated 12 amps, so I had no concern about that issue. I just added a 3 amp inline fuse to the external outlet to protect the furnace from any idiot trying to use the outlet for something else while it is energized. If I were to have used central air conditioning, it is likely that two furnace blower speeds would have been used and I would have had to find a solution involving one or two auxiliary relays to run the fan under both powered conditions. That would be more complexity and expense, especially if I desired different speeds for the inline fan as well.Secondly, it does not come with speed control, which is an essential part of heat balancing in a furnace duct system. I also found the air turbulence noise entirely unacceptable for any bedroom, if I applied more than half voltage. The turbulence noise propagated through all of my metal heat ducts and was loudest from the shortest ducts - not the longest one in which I used the fan. I tested the fan at all voltages, using a variac (variable voltage transformer) and found it entirely free of any motor hum at all speeds. It is a high quality fan, easily controlled by variable voltage. It even has near-unity power factor correction, which shows an unusual attention to quality construction. I would recommend use of a variac for anyone unsure of what voltage produces the air flow/air noise they need/can tolerate. So when I read reviews of people using the "wall wart" type speed controllers and hearing a motor hum, I am sure that it is because the "wart" is not producing a sinusoidal voltage and should not be used with this fan. I ended up installing two small (40 VA) 120/29 volt (labeled 120/25) transformers in the furnace blower compartment, wired in series to produce the 60 volts I ended up applying to the fan from my 123 volt service. It is possible to buy and ship a suitable transformer with at least a one amp rating and whatever voltage you want for less than $40, once you know what you need. Or just use a variac which may cost a bit less than the fan, when shipped.Installation was not easy either. The fan is heavy and had to be mounted with its "bulge" and hangers located between floor joists, because the duct was too close to the ceiling/joists. The fan's input and output diameters are larger than a male 6-inch duct, so a short female section must be added to fit a male pipe end. Then it took about three layers of duct tape to bulk it out to better fit the inside diameter of the female pipe. Screws and drilling used on the inlet need to carefully avoid the circumferential blower.A 6-inch heat duct will typically carry 85-100 cubic feet per minute (CFM). At half voltage and about 32-35 watts with transformer losses, I ended up feeling more than that typical air flow, despite the duct being more than 20 feet long and having seven elbows along its circuitous route. Before the inline fan it carried a negligible amount of air, so I am quite satisfied with the application. My distant bedroom is no longer 5-10 degrees cooler than the rest of the house. I don't see anyone wanting 400 CFM and the associated noise in their home, but the capability is probably there.
Top reviews from the United States
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Reviewed in the United States on November 30, 2019
First it comes with no means to make it turn on with the furnace blower. It would be idiotic (for me) to run it all the time. As an engineer, I had no problem wiring it to the high heat and neutral connections on the furnace and installing an external outlet for it to plug into; most users would not have those skills. Before doing so, I checked the maximum furnace blower demand and determined that using any furnace blower speed less than the maximum left plenty of unused amperage for the inline fan's maximum of less than one amp draw. Additionally the entire maximum furnace amperage was less than 8 amps and all the furnace control switches were rated 12 amps, so I had no concern about that issue. I just added a 3 amp inline fuse to the external outlet to protect the furnace from any idiot trying to use the outlet for something else while it is energized. If I were to have used central air conditioning, it is likely that two furnace blower speeds would have been used and I would have had to find a solution involving one or two auxiliary relays to run the fan under both powered conditions. That would be more complexity and expense, especially if I desired different speeds for the inline fan as well.
Secondly, it does not come with speed control, which is an essential part of heat balancing in a furnace duct system. I also found the air turbulence noise entirely unacceptable for any bedroom, if I applied more than half voltage. The turbulence noise propagated through all of my metal heat ducts and was loudest from the shortest ducts - not the longest one in which I used the fan. I tested the fan at all voltages, using a variac (variable voltage transformer) and found it entirely free of any motor hum at all speeds. It is a high quality fan, easily controlled by variable voltage. It even has near-unity power factor correction, which shows an unusual attention to quality construction. I would recommend use of a variac for anyone unsure of what voltage produces the air flow/air noise they need/can tolerate. So when I read reviews of people using the "wall wart" type speed controllers and hearing a motor hum, I am sure that it is because the "wart" is not producing a sinusoidal voltage and should not be used with this fan. I ended up installing two small (40 VA) 120/29 volt (labeled 120/25) transformers in the furnace blower compartment, wired in series to produce the 60 volts I ended up applying to the fan from my 123 volt service. It is possible to buy and ship a suitable transformer with at least a one amp rating and whatever voltage you want for less than $40, once you know what you need. Or just use a variac which may cost a bit less than the fan, when shipped.
Installation was not easy either. The fan is heavy and had to be mounted with its "bulge" and hangers located between floor joists, because the duct was too close to the ceiling/joists. The fan's input and output diameters are larger than a male 6-inch duct, so a short female section must be added to fit a male pipe end. Then it took about three layers of duct tape to bulk it out to better fit the inside diameter of the female pipe. Screws and drilling used on the inlet need to carefully avoid the circumferential blower.
A 6-inch heat duct will typically carry 85-100 cubic feet per minute (CFM). At half voltage and about 32-35 watts with transformer losses, I ended up feeling more than that typical air flow, despite the duct being more than 20 feet long and having seven elbows along its circuitous route. Before the inline fan it carried a negligible amount of air, so I am quite satisfied with the application. My distant bedroom is no longer 5-10 degrees cooler than the rest of the house. I don't see anyone wanting 400 CFM and the associated noise in their home, but the capability is probably there.
Size: 6"Verified Purchase
May be Part of a Quality Solution (four stars)
Reviewed in the United States on November 30, 2019
The Active Air 6-inch inline fan is extremely well built, but quite difficult to use as a heat duct booster. If you just want to move a lot of air through a 6-inch duct, it will do the job extremely well. But as part of a furnace heating system solution, it will require a lot more than what's in the box. That is the only reason I will not give it five stars.Reviewed in the United States on November 30, 2019
First it comes with no means to make it turn on with the furnace blower. It would be idiotic (for me) to run it all the time. As an engineer, I had no problem wiring it to the high heat and neutral connections on the furnace and installing an external outlet for it to plug into; most users would not have those skills. Before doing so, I checked the maximum furnace blower demand and determined that using any furnace blower speed less than the maximum left plenty of unused amperage for the inline fan's maximum of less than one amp draw. Additionally the entire maximum furnace amperage was less than 8 amps and all the furnace control switches were rated 12 amps, so I had no concern about that issue. I just added a 3 amp inline fuse to the external outlet to protect the furnace from any idiot trying to use the outlet for something else while it is energized. If I were to have used central air conditioning, it is likely that two furnace blower speeds would have been used and I would have had to find a solution involving one or two auxiliary relays to run the fan under both powered conditions. That would be more complexity and expense, especially if I desired different speeds for the inline fan as well.
Secondly, it does not come with speed control, which is an essential part of heat balancing in a furnace duct system. I also found the air turbulence noise entirely unacceptable for any bedroom, if I applied more than half voltage. The turbulence noise propagated through all of my metal heat ducts and was loudest from the shortest ducts - not the longest one in which I used the fan. I tested the fan at all voltages, using a variac (variable voltage transformer) and found it entirely free of any motor hum at all speeds. It is a high quality fan, easily controlled by variable voltage. It even has near-unity power factor correction, which shows an unusual attention to quality construction. I would recommend use of a variac for anyone unsure of what voltage produces the air flow/air noise they need/can tolerate. So when I read reviews of people using the "wall wart" type speed controllers and hearing a motor hum, I am sure that it is because the "wart" is not producing a sinusoidal voltage and should not be used with this fan. I ended up installing two small (40 VA) 120/29 volt (labeled 120/25) transformers in the furnace blower compartment, wired in series to produce the 60 volts I ended up applying to the fan from my 123 volt service. It is possible to buy and ship a suitable transformer with at least a one amp rating and whatever voltage you want for less than $40, once you know what you need. Or just use a variac which may cost a bit less than the fan, when shipped.
Installation was not easy either. The fan is heavy and had to be mounted with its "bulge" and hangers located between floor joists, because the duct was too close to the ceiling/joists. The fan's input and output diameters are larger than a male 6-inch duct, so a short female section must be added to fit a male pipe end. Then it took about three layers of duct tape to bulk it out to better fit the inside diameter of the female pipe. Screws and drilling used on the inlet need to carefully avoid the circumferential blower.
A 6-inch heat duct will typically carry 85-100 cubic feet per minute (CFM). At half voltage and about 32-35 watts with transformer losses, I ended up feeling more than that typical air flow, despite the duct being more than 20 feet long and having seven elbows along its circuitous route. Before the inline fan it carried a negligible amount of air, so I am quite satisfied with the application. My distant bedroom is no longer 5-10 degrees cooler than the rest of the house. I don't see anyone wanting 400 CFM and the associated noise in their home, but the capability is probably there.
Images in this review
Reviewed in the United States on June 25, 2014
Top reviews from other countries
Sean
Great product, exactly as advertised
Reviewed in Canada on June 25, 2019Size: 6"Verified Purchase
Glen
Putting this unit through its paces.
Reviewed in Canada on February 8, 2017Size: 6"Verified Purchase
klegh
Bought this for a large bathroom with a humidity problem
Reviewed in Canada on December 3, 2023Size: 6"Verified Purchase
