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- Verified Buyer
I've had TWO of these in near CONSTANT service for 3 years. I waited that long because I didn't want to leave a review just to have the product perhaps fail and have to come back on here. I cannot recommend this model more, as I installed it inline in the basement duct work and it perfomed exactly as I desired. One was installed for my sons' room and one for my daughters. The way the home is designed their bedrooms protrude out the front/back of the house and builder ran ONE duct to each room. The kids rooms are freezing in the winter and roasting in the summer. These brushless fans SOLVED that problem using some other custom wiring and wireless thermostats. Without getting into that details, and focusing on this duct fan instead; I can say that they have been subjected to use EVERYTIME my home calls for either HOT or COLD via the thermostat in the living room. Not once have have either of these fans missed a beat. The amount of air that they are capable of forcing through a 6" duct is quite serious and unless you're building a wind-tunnel it will be fine. With that all said you will hear this unit running, and you will hear the wind noise of the forced air going through the duct. No one here minds that, as now the rooms are perfectly stable in temperature.Using this fan to move hot air from our laundry room made by a heat pump dryer, into our basement where a heat pump water heater is. Fan is quiet and moves a lot of air easily cools a 6X6 room. The thermostat works flawlessly.I’ve been using bilge fans to provide simulated wind for a flight simulator but they are sleeve bearing, brushed, DC motors and wear out under sustained high RPM operation. I started looking for an alternative and found these. Early into their use but they are perfect! With electronic commutation there are no brushes to wear out and the ball bearings are rated at 70,000 hours, 8 years, continuous. The kicker is the control circuit. You can use the supplied potentiometer for manual control, but there is a 300mA, 10V supply for the pot that can also be used for signal conditioning from logic level control circuitry. These will take a DAC voltage, a digital potentiometer wiper, or a PWM signal. It just needs to fit in that 0-10V window. The PWM signal is very tolerant of PWM frequency. You just want to make sure the square wave bangs the full 0-10V input range to be able to access the full RPM range of the fan. The only down side I can find is that there is a soft start characteristic where there is a time constant to speed changes. For my application the time constant is a bit long but in practice shouldn’t be too noticeable. The time constant makes for about a 10 second spin up from stopped to full speed. Most won’t care but there is a bit of lag that may be an issue for some applications.Construction is sturdy and these seem very well designed and built. The outer case is steel and nicely formed and painted, but what mattered more for me are the innards. The inlet is sculpted to smooth air flow to the rotor, and the air channel expands back out to full ID to slow the air into the stator area. 7 rotor blades and 7 stator blades. Mold lines are clean and there is minimal flash. They really seem well-built. And maintainable. You will void your warranty but it looks like these can be disassembled if they ever do need lubrication or cleaning. I say looks like because I haven’t actually tried it but phillips screws are used throughout. There is a tamper seal that will tell the tale, though.And they are quiet. Way more quiet than bilge fans. At low speeds you can’t even hear them. At high speed you get some wind noise and some inlet whine (5000 RPM at full speed) but it’s a huge improvement over the bilge fans. When they say quiet, it’s not exaggerating.5 stars hands down. These ECM fans are near perfect for any automated fan control applications. It just takes level shifting of some sort to control these with PCs, Arduinos, or Raspberry Pi SBCs. I2C and SPI DACs and pots that are high voltage tolerant on their outputs should work fine. There is also an open collector tach signal for those who want closed loop control or just to know the fans are turning.PWM control is new to these fans so if that’s important to you, just look for the 4-conductor 1/8” miniplug connectors. The new ones use those. Customer service is great and Steve has been super helpful in getting answers to my inane questions.I don’t have much time with these to comment on longevity but with the alternative control built in, EC motors, and ball bearings on top of surprising engineering in the inlet, rotor, and stator regions, this series of fans are hands down winners.We used it for the shed to get the humidity out,Great.I'm impressed ! For the cost, it pushes a lot of air. I like the variable speed controller, so I can match the required CFM for my application. Accessories seem well designed. Easy to assemble the 2 style controllers, ( selector button or variable dial) like plugging in a very long mini audio cord.Nice job TerraBloom designers !!This fan is quiet, uses very little electricity, and does the job perfectly. The various ways to control it are easy to change out with a simple port you plug the controller device into. The fan has great capacity and airflow. It made a huge difference in my application. It is light and easy to hang. Lots of places to connect the hanging cords/straps to it. I would buy this again.The fan is great...very quiet before and after install in HVAC duct. Huge improvement over old fan in a can. At 30% power, this is pushing air to an upstairs bedroom that never had airflow due to an inadequate old fan. Controller allows infinite choice of settings. Cords are long. TerraBloom customer service was excellent at answering questions before purchase; fast clear responses. 1 suggestion: this fan seems primarily designed for use with soft/flexible ducts and not for use in standard aluminum ductwork. I attached it using duct tape and a large piece of pvc sheet to make a collar connecting it to the duct. Hoping terrabloom will add a lip or flange to these fans to allow room for install in standard home duct work. Also, the 6" diameter opening seems very tight: I could not insert the ductwork into the 6" fan opening or insert fan into duct end.. I wimprovised using tape and pvc as it allowed me to attach the fan without metal to metal contact, which should reduce any noise.Used it to improve poorly ventilated room located at the end of a long duct. What a difference, even at lowest speed (which I cannot hear) it does make a huge improvement. Installed it inside the duct work - used the 6 inches model). Added the remote control too so I can control it using IFTTT/Broadcom/ecobee/Samsung multisensor. Did this to address a cooling problem but thought I'd work on this during the confinement/Christmas Holidays and I can already say the air quality has improved quite a bit. Hopefully, this will fix the issue I have had cooling that room during the hot summer days but I am quite optimistic. Will try to provide an update in 6 months...This gorgeous piece of equipment comes in a tidy package that's absolutely perfect to connect into a round duct to move air where you want it. Despite its small size it moves a lot of air.The design resembles the compressor on the front of a jet engine: the fan blades are aerofoil-shaped, not just bent pieces of sheet plastic or metal. Yet noise levels are low, almost imperceptible at lowest speeds. And speaking of speeds, you can adjust from very low to very high.All in all, the Terrabloom fan a quality piece of gear that does a terrific job at a modest price. I'm really impressed.Fantastic! Perfect for my grow tent. Packaged professionally, well made, easy install, super quiet, low wattage, moves a lot of air. Two speed control options, i like the preset 1-8 button with LED display the best. Fits the terrabloom charcoal filter perfectly, no messing around with fit. Would highly recommend to any serious grower. Bang for buck!We had a cold room at the longest duct run away. This made it a sauna! It is operating at 10% capacity and perfectly and quietly balanced our system. Every house should have these for the second level rooms so a balance can be achieved.Using it to extract fumes from a home garage hobby welding shop. Works really well and is very quiet. Quite strong. I accidentally had a glove get sucked up the intake tube I attached to it. Did not damage the unit but showed it has real sucking power.
