HVAC Duct Booster Installation (Hard Wired to Furnace!)
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- เผยแพร่เมื่อ 23 ก.ค. 2024
- Duct Booster Used: amzn.to/3BWaCJI
In this video, we are installing a Tjernlund DB-2 into our HVAC ductwork and hard wiring it into the furnace, so that it only turns on when the blower is running. The furnace that we are wiring into is a Trane XR92. In addition, I also wired an in line switch so that the duct booster can be turned off seasonally. This system helped to balance the HVAC system and provide more flow to an upstairs duct. - วิทยาศาสตร์และเทคโนโลยี
This is the first video that really simplifies how to connect an Inline unit to the control panel and have it turn on/off when the furnance is running or not. Thank you
Thanks! Yeah it is really not too tricky once you get your head wrapped around the available circuits on the furnace circuit board.
I just bought an in-line duct fan and I had just assumed that it would switch on automatically with the main fan. Imagine my shock when it came with a separate controller. I don't HVAC systems don't come with the necessary outlets or jacks to make this simple.
Finally a video showing what you need to add a boost to HVAC where air flow is low on upper floors due to bends and length. Don't be afraid to go in further detail on wiring and circuit boards. Reason we are here is because we are DIY not professionals doing this everyday. Time stamps in the video will help those who need to skip those detailed parts.
Great video. Straight to the point and not any time wasted on opinions, conjecture, why you need it, etc.
Nice video on a simple application. Definitely adding the inline switch.
This is exactly what I was looking for! You did a great job explaining and demonstrating your setup. The EC1/EC2 connection is what I was hoping for and I was able to confirm that my furnace's control board does have them. Many thanks and keep up the great work.
Yes it really does help, I was racking my brain over how to do this. I will be using 2 axial fans and I'll probably use the "eac" circuit as a control to actuate a contacter relay to switch power. Thanks for this bit of info.
very VERY helpful. to the point, provides great info and AMEN for not having dozens of minutes about side topics. THANK-YOU!
Thank you! Glad it could be helpful.
This was a great help. I took your suggestion and included a switch. Thank you for the help.
Great job explaining how to add a Duct booster to HVAC systems. I needed to add one to my existing system and your video helped me to install my own. Thanks!
Thanks Steve! Glad I could help!
Short and to the point. Big help. Thank you.
Thank you!
I appreciate the video, I'm going to be doing exactly this for the coming winter.
Thank you! I have saved and downloaded this so I can rewatch and do this myself!
Cool. I ended up setting up a junction box and an outlet where I plugged in the booster fan (instead of a switch). I wired the other end of the electrical line to the furnace as described.
Awesome explanations and video. Thank you.
Thanks for sharing and I always get a kick out of the term "squirrel cage"
Seems simple enough thanks for the info this exactly is what I was thinking
Very well explained. Thanks!!
Thanks for the video it was very helpful my daughter bought an old house and we're trying to increase airflow into the upstairs hopefully it will help 👍
That should definitely help!
Thanks for the excellent information.
Very clear, easy to understand. Thanks!
Thank you!
Fantastic and to the point!
Nice thank you on your inputs very helpful have a good day
Great video. Thanks.
Thanks, just what I needed
Awesome!
Very helpful. Thank you!
Very informative, liked you idea of adding a switch if it get to cold or to hot. I would just trim the register slightly closed. Thanks.
Nice work
Thanks for the video!
Thanks for watching!
Why I couldn't see this video before....thanks for the info
Good tutorial. Thanks.
Thanks! Glad it was helpful.
Thank man! Great video
Thank you!
Thank you so much
Thankyou so much
I've been wanting to do this for years in my old house. This first floor is always nice and cool but the second floor is always warm at night. Makes sleeping uncomfortable. I'll be doing something very similar to this in the near future.
Thanks for the DIY. Did you see significant improvement after installing the booster fan?
Thanks for posting. What if there is no EAC wire in my box? There are only 2 sets of wires: one supply and the other going to the blower.
Thanks Dude...johnny on the spot as I need to do this very thing at my house.
This is not the correct way to wire in a booster fan. The EAC contact is not designed for an inductive motor load. He also did not fuse the motor with an inline fuse. The booster fan should be wired to a the green fan wire on the furnace - 24VAC. The 24VAC should be used to energize a relay that turns on the 120VAC of the fan. There are booster fan relays designed for this purpose.
Very nice work TY for sharing. Im imagining an EC inline fan as a booster that would be super efficient.
Can i asd a 2 duct booster fans and connect for each EAC wire?
What about multiple zones if the blower comes on when main blower comes on it will come on every time the system calls for heat/ac right?
TYVM!!!
Can you connect 2 booster fans to the furnace fan ?
Very nice. I'm thinking of installing one. I have a 2 storey home with furnace in basement and one of the upper bedrooms doesn't get enough airflow due to length and number of elbows. Will I notice much improvement?
Yes, you should. Our flow on the vent that it was installed to increased by about 50% which helped keep the room a couple degrees cooler in the summer. In the winter I keep it off, since I don't need the extra heat pumped upstairs.
Just seen your video
i have an natural gas furnace wiring is different .... got any wiring help ????
Would this work on a rheem furnace?
If you never need heat in the problem room, can you wire into the AC compressor somehow so the fan only comes on when AC is on?
Assuming your AC uses a different blower speed than your heat (which most do), you could use a relay from the blower speed that is used for AC to trigger the booster circuit. You may be able to tie directly into your blower wires if the upstart current of your booster doesn't compete too bad with the main blower upstart needs.
Where did you add the booster fan. Was it right after the output going into the trunk line?
It was about a foot into the branch that I wanted to boost with the duct booster.
I believe this nice video should be spread out more for others. Can I, by any chance, repost your channel on another platform called Ganjing World? Hope to get your response soon. Thanks!
Mine has no hum or eac terminals. It’s on the board but nothing to attach to
How much more flow?
Can I tie a booster fan into lighting jbox? When the lights are on, power to fan comes on?
I don't see an easy way to have it kick on when the furnace blower kicks on and also be switchable with a light switch that also controls lights. You could run it though a switch but it would be on non stop when the lights were one vs only when the furnace output is on. I have mine on a light switch to turn it off in the winter but it is the only thing on the switch.
If you use the humidifier taps the draft booster will likely only run in heating mode.
Thanks for the video. What is the CFM rating for that booster?
It's an AB-1 booster - Google it. The proper way to wire the booster is to turn it on via the green fan wire from the furnace, then use that low voltage signal to energize a booster fan relay near the fan. And to put a fuse in line with the fan motor and relay. Then it will meet electrical code, not burn out the control board in you furnace, and not overheat a long AC run to the booster should the brushes or bearings in the motor cause it to overhead and draw excess current.
Thank you for that
Can you use more than one
Yes you could but you would need to use a relay if you need to draw more current than the circuit on your board could handle. You can also run one on the humidifier circuit and the other on the circuit I used.
How many cfm did you gain?
It will flow 325cfm with no resistance. I don't know what I was previously flowing on that lateral but it feels like about 2x of what I was at before. It helped bring the room down about 2 degrees in the summer and I keep it off in the winter.
@Cool Stuff Guys Like excellent! I'm doing the same thing this year in my house too!
A squirrel cage fan pulls in air from the side through the center of the fan. You are pulling air from your basement and pushing it into your duct.
It's not a normal squirrel cage like you would find in a furnace blower with the side inlet and top outlet. It has a squirrel cage but it is setup to "scoop" air and push it up the duct. Almost more like a paddle wheel. It's probably not nearly as efficient but works pretty well and doesn't draw a lot of power.
You can not gain any advantage after cutting the squirrel cage.What you did could work against you.
Excellent video
Thanks! Hope it helps if you install a booster on your HVAC system.