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post #1 of 20 Old 07-23-2014, 12:09 PM - Thread Starter
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Quietest 6" Inline Fan Testing

It seems that vegetable/agri growers have similar needs - moving air in/out of the growing room without the noise being a disturbance. One YouTube there are a bunch of reviews from MonsterGardens.com (I have no connection to them, but found most of the reviews well done - and have compiled the relevant info below)

Just throwing out there - that they had 2 others that rated well: Also listening to the actual noise in the video may be of help to some:
Summary of db / max CFM @ 0"/watt/Current Amazon price
  • FanTech 6" FGC 6XL - 78.5db/392 CFM/185 watts/ $170 (btw- it seems that MonsterGardens no longer sell the Fantech on their site). This is the one mentioned very often on AVS
  • Vortex S-Line Ultra Quiet - $178- - 79.5db; 215 watts (db and wattage for the 8"model); (polycarbonate shell- vs. metal - for less sound, also has a nice mounting bracket which helps minimize reverb; also includes integrated backdraft dampener
  • Rebel - seems to have been be their own brand - the 8" model- 78.1 - 79db ; 222 watts
  • Phresh Hyperfan (smallest only about 6"x6"x5", very energy efficient) - includes the speed controller- 74db @ 100% (57db @ 35%), 11watts @ 35%, 48 watts @ 50%, 56 watts @ 100%)/ $175 (note inclusion of the speed controller saves about $25)- they have one here with Myu the silencer for about $250.. The 8" model 60db@35%; @50% 75 watts! , 83 watts @ 100%-
  • 8"x9" x6.5"- it also had more suction vs. the Vortex
My total newbie conclusion is that the Hyperfan is definately worthy of consideration, and probably best to get the 8". Let me know what you think.

Video Reviews:


- - at about 5:50 of
you can hear the fan. (date of review Aug '13)/
Rebel - their overall recommendation. They have a video of it vs. the Vortex being about 1db quieter and more powerful. (as of June '13, though interestingly I couldn't find it on their website now. Likewise, I couldn't find it on Amazon)- (for the 8" model- 78.1 - 79db ; 222 watts)
- Interesting video showing impact of , summary of their recommendations:
  • Get a larger (e.g. 8") fan, and running it at a lower speed- note -going from a 6" to an 8" fan increases max CFM from 315 to 710- so you can easily run it at 50%; and it's only about $30 more expensive for the 8" model
  • don't mount directly to stud - rather hang from stud via ratchets
  • insulation
  • Neoprene duct clamps
  • Duct silencer (i.e. a muffler) (put between carbon filter and fan)- e.g. Phresh (costs about $100)
  • Of course the tips on the web site- ala the "dead vent" - accomplish the same results for less money - but figured the info might help some with less building skill


Here's a calculator to determine what size you need

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post #2 of 20 Old 07-24-2014, 04:55 AM
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Amazing what companies now exist that supply grow houses. Of course they want quiet fans, they don't want the neighbors to know.

The 6 and 8 inch Vortex are available through HVACQuick.com as are a number of other inline fans. S&P has a version of the fan without the backdraft damper and fancy paint job.
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post #3 of 20 Old 07-24-2014, 06:06 AM - Thread Starter
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Running the risk of embarrassing myself here with naiveté - but exactly WHAT are they growing (that they don't want the neighbors to know)?? :-)
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post #4 of 20 Old 07-24-2014, 06:53 AM
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Originally Posted by cgott42 View Post
Running the risk of embarrassing myself here with naiveté - but exactly WHAT are they growing (that they don't want the neighbors to know)?? :-)
Weed.

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post #5 of 20 Old 07-24-2014, 07:01 AM - Thread Starter
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aha !
So THAT's why all the people testing the videos are young males , dressed more like college students than farmers - and don't look at all like the older folks at my local greenhouse.
So I guess we share a common need - to keep things quiet ;-)
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post #6 of 20 Old 07-24-2014, 10:11 AM
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So I started to wonder, now that you can actually legally grow wacky tobaccey how much can you make? If you believe this article if you have a 10x10 spare room over $100,000 per year.

http://www.marijuanabusinessnews.com...ower_make.aspx

Next question is can you grow it in your theater?
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post #7 of 20 Old 07-24-2014, 10:45 AM - Thread Starter
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Originally Posted by BIGmouthinDC View Post
So I started to wonder, now that you can actually legally grow wacky tobaccey how much can you make? If you believe this article if you have a 10x10 spare room over $100,000 per year.

http://www.marijuanabusinessnews.com...ower_make.aspx

Next question is can you grow it in your theater?
Multipurpose home theaters ARE getting more and more popular ...
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post #8 of 20 Old 07-24-2014, 02:29 PM
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Next question is can you grow it in your theater?
Seems about right since you'll generally have a lot of candy and popcorn handy in a home theater also. And comfortable reclining chairs....

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post #9 of 20 Old 07-26-2014, 01:39 PM
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Oh, yeah, that UV lighting is for my star ceiling...
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post #10 of 20 Old 03-17-2016, 09:20 PM
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Bumping this old thread since I'm in the process of figuring this issue out and searching AVS there are not a lot of threads on the subject, so this one kept coming up. Secondly, no one ever really answered CGott42's question, so here's my take....

Quote:
Originally Posted by cgott42 View Post
It seems that vegetable/agri growers have similar needs - moving air in/out of the growing room without the noise being a disturbance. One YouTube there are a bunch of reviews from MonsterGardens.com (I have no connection to them, but found most of the reviews well done - and have compiled the relevant info below)

Just throwing out there - that they had 2 others that rated well: Also listening to the actual noise in the video may be of help to some:
Summary of db / max CFM @ 0"/watt/Current Amazon price
  • FanTech 6" FGC 6XL - 78.5db/392 CFM/185 watts/ $170 (btw- it seems that MonsterGardens no longer sell the Fantech on their site). This is the one mentioned very often on AVS
  • Vortex S-Line Ultra Quiet - $178- - 79.5db; 215 watts (db and wattage for the 8"model); (polycarbonate shell- vs. metal - for less sound, also has a nice mounting bracket which helps minimize reverb; also includes integrated backdraft dampener
  • Rebel - seems to have been be their own brand - the 8" model- 78.1 - 79db ; 222 watts
  • Phresh Hyperfan (smallest only about 6"x6"x5", very energy efficient) - includes the speed controller- 74db @ 100% (57db @ 35%), 11watts @ 35%, 48 watts @ 50%, 56 watts @ 100%)/ $175 (note inclusion of the speed controller saves about $25)- they have one here with Myu the silencer for about $250.. The 8" model 60db@35%; @50% 75 watts! , 83 watts @ 100%-
  • 8"x9" x6.5"- it also had more suction vs. the Vortex
My total newbie conclusion is that the Hyperfan is definately worthy of consideration, and probably best to get the 8". Let me know what you think.
I've spent a fair amount of time researching this very issue. I disagree with CGott's conclusion on the Hyperfan. Here's why:
  1. I can't figure out how duct work would connect to it, based on its design
  2. I haven't been able to locate any instruction manual for their products
  3. Seems to be geared toward the pot-head growers, and that's their only market
  4. There are name-brand and vetted alternatives available for similar prices with vetted reviews and years worth of testing

Rebel: Similar conclusion to Hyperfan. My guess it's a white label (perhaps copy of) Fantech's FGC series

Vortex: All plastic - not necessarily a bad thing. My main issue with Vortex is their excessive RPM speeds. High RPM = loud.

So far, the only brands I find worth considering for inline fans are Fantech, Panasonic, and Soler & Palau. Of those, none of the Fantech are quiet. For instance, I inquired with their tech support regarding one of their new "quiet" CVS series, and the response I got was, "about 12 sone." That is ~64db. That's not quiet. That said, in the HVAC world it's not loud either. Put it in a hush box and you'd prolly be fine.

Panasonic OTOH, advertises <2 sone (<38 db; i.e. QUIET!) for some of its WhisperLine models.

S&P does not rate its "remote" fans, but from what I have been told, their -S ("silent") line is within reach of the Panasonic's when run on their low speed setting.
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post #11 of 20 Old 03-18-2016, 09:46 AM
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Quote:
Originally Posted by HT Geek View Post
Bumping this old thread since I'm in the process of figuring this issue out and searching AVS there are not a lot of threads on the subject, so this one kept coming up. Secondly, no one ever really answered CGott42's question, so here's my take....



I've spent a fair amount of time researching this very issue. I disagree with CGott's conclusion on the Hyperfan. Here's why:
  1. I can't figure out how duct work would connect to it, based on its design
  2. I haven't been able to locate any instruction manual for their products
  3. Seems to be geared toward the pot-head growers, and that's their only market
  4. There are name-brand and vetted alternatives available for similar prices with vetted reviews and years worth of testing

Rebel: Similar conclusion to Hyperfan. My guess it's a white label (perhaps copy of) Fantech's FGC series

Vortex: All plastic - not necessarily a bad thing. My main issue with Vortex is their excessive RPM speeds. High RPM = loud.

So far, the only brands I find worth considering for inline fans are Fantech, Panasonic, and Soler & Palau. Of those, none of the Fantech are quiet. For instance, I inquired with their tech support regarding one of their new "quiet" CVS series, and the response I got was, "about 12 sone." That is ~64db. That's not quiet. That said, in the HVAC world it's not loud either. Put it in a hush box and you'd prolly be fine.

Panasonic OTOH, advertises <2 sone (<38 db; i.e. QUIET!) for some of its WhisperLine models.

S&P does not rate its "remote" fans, but from what I have been told, their -S ("silent") line is within reach of the Panasonic's when run on their low speed setting.
Truly thanks for your feedback and bringing this thread alive, it's on my bucket list to add cooling to my AV rack, as it's got way more gear than originally planned back in 2007, so now I need to tackle that project.

What is your time frame to buy your inline fan?
I want to use one to remove heat from the below AV rack, I'll have it exit outside of the HT in the rec room
AV rack


Rec room side, it will exit above the drop ceiling, I can run a flex duct there and fan (this is 2 year old picture, before 4ft door installed)
Most likely "on" via the HT on for simplicity .... 12v trigger off the Denon 4520CI


Quote:
Originally Posted by LeBon View Post
Oh, yeah, that UV lighting is for my star ceiling...
Well the Franklin Mint secretly planned their Star Trek lamps to be dual purpose - reading and recreation growing in a HT, it's got a UV lamp!
. . .
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post #12 of 20 Old 03-18-2016, 10:29 AM
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What is your time frame to buy your inline fan?
Likely within the next 2 weeks, though may be 4-5 weeks until I have time to install them. I've got 2 biz trips between now and then that are cramping my ability to work on the HT project. I was on the fence w/the in-line fan too, but last night I decided it's better to have it than not and wish I had one if we have a football party, etc.

Quote:
I want to use one to remove heat from the below AV rack, I'll have it exit outside of the HT in the rec room....

Rec room side, it will exit above the drop ceiling, I can run a flex duct there and fan (this is 2 year old picture, before 4ft door installed)
Most likely "on" via the HT on for simplicity .... 12v trigger off the Denon 4520CI
Ah, so you'll have basically a dead vent. Is your A/V rack sealed or is it open to the room (looks like it's open, from what I can see in your pics)? Wouldn't you want to mount the intake up high (i.e. heat rising)? You could possibly install a rackable fan or two down low to help push the air up, though with good suction from an in-line fan I doubt you'll need to do that - even if your rack is open to the room.

Since you'll be venting to another room that could be occupied, I would recommend against the Fantech fans. They are too loud, even behind the acoustic tiles. The Panasonic bathroom fans are comparably priced and appear to be the quietest. They can really move some air too. Zoro Tools had a 20% off sale yesterday, but I could not do my research fast enough to take advantage of it.

My circumstances are going to be a bit more of a logistical challenge. I'm planning to zone my HT room, and I've got to be certain the in-line fans don't attempt to operate when the dampers are closed. My thought/plan atm is to hookup a 24v relay next to each in-line fan (1 supply, 1 return) and trick the zone system into thinking the relays are spring dampers (in which case the zone system has to apply continuous voltage to keep them open).

One issue I haven't figured out yet (would really appreciate input on this from anyone).... Do I need an in-line fan in the return duct if I have one in the supply duct? Put another way, can I get away with good results if I only have extra air movement in one or the other (supply or return)? My impression so far is that I'd be better off with the same throughput fan in both supply and return ducts to ensure equal CFM flow, but I have not been able to confirm this.
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post #13 of 20 Old 03-18-2016, 10:38 AM
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One issue I haven't figured out yet (would really appreciate input on this from anyone).... Do I need an in-line fan in the return duct if I have one in the supply duct? Put another way, can I get away with good results if I only have extra air movement in one or the other (supply or return)? My impression so far is that I'd be better off with the same throughput fan in both supply and return ducts to ensure equal CFM flow, but I have not been able to confirm this.
Depends on the capacity of the fan, the heat load and temperature differential of the air coming in. A major factor in fan CFM is resistance. The higher the resistance the lower the CFM. One assigned to both push and pull air is fighting twice the resistance of a fan just doing one or the other. My work retrofitting the Black Cat theater led to adding a second fan in an attempt to keep up with the heat load in his dead vent theater. More details in that thread.
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post #14 of 20 Old 03-18-2016, 11:21 AM
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Quote:
Originally Posted by HT Geek View Post
Likely within the next 2 weeks, though may be 4-5 weeks until I have time to install them. I've got 2 biz trips between now and then that are cramping my ability to work on the HT project. I was on the fence w/the in-line fan too, but last night I decided it's better to have it than not and wish I had one if we have a football party, etc.



Ah, so you'll have basically a dead vent. Is your A/V rack sealed or is it open to the room (looks like it's open, from what I can see in your pics)? Wouldn't you want to mount the intake up high (i.e. heat rising)? You could possibly install a rackable fan or two down low to help push the air up, though with good suction from an in-line fan I doubt you'll need to do that - even if your rack is open to the room.

Since you'll be venting to another room that could be occupied, I would recommend against the Fantech fans. They are too loud, even behind the acoustic tiles. The Panasonic bathroom fans are comparably priced and appear to be the quietest. They can really move some air too. Zoro Tools had a 20% off sale yesterday, but I could not do my research fast enough to take advantage of it.

My circumstances are going to be a bit more of a logistical challenge. I'm planning to zone my HT room, and I've got to be certain the in-line fans don't attempt to operate when the dampers are closed. My thought/plan atm is to hookup a 24v relay next to each in-line fan (1 supply, 1 return) and trick the zone system into thinking the relays are spring dampers (in which case the zone system has to apply continuous voltage to keep them open).

One issue I haven't figured out yet (would really appreciate input on this from anyone).... Do I need an in-line fan in the return duct if I have one in the supply duct? Put another way, can I get away with good results if I only have extra air movement in one or the other (supply or return)? My impression so far is that I'd be better off with the same throughput fan in both supply and return ducts to ensure equal CFM flow, but I have not been able to confirm this.
Yes, that AV rack is opened to the HT side, closed to rec room by sealed doors (for easy access to back side of gear).
I'm going to cut a hole in top, that is where flex duct will go, and then that will suck the hot air out back into the rec room side above those ceiling tiles.
Thanks for advice on quiet fans, as truly I want no added noise in the rec room also.


At one time I was thinking to pipe COLD air into the HT from the closed utility room next to it, as I have a air heat pump hot water heater, and that room is actually 10 degrees colder than the rec room always!
But for simplicity decided just to go with removed the hot air for now, the HT does rise a few degrees over 2-3 hours movie .....
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One assigned to both push and pull air is fighting twice the resistance of a fan just doing one or the other. My work retrofitting the Black Cat theater led to adding a second fan in an attempt to keep up with the heat load in his dead vent theater. More details in that thread.
Thanks, Big.

What I was referring to was having a single fan in the supply duct and a single fan in the return duct, where the fans have equal ratings (possibly identical fans). What I don't know yet is if the fans would be identical distances from the room.
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At one time I was thinking to pipe COLD air into the HT from the closed utility room next to it, as I have a air heat pump hot water heater, and that room is actually 10 degrees colder than the rec room always!
Sounds like that idea has merit, though I would imagine you'd first want to consider how air circulates in that room right now. I have learned this HVAC stuff is a tad more complicated than one would think at first glance.

Fluid dynamics seems to fit the HVAC model well though. I've glanced at a few books on the subject online. Good material for curing insomnia. Or making my head hurt. LOL.
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Update - I have the Hyperfan - one deadvent coming in and one deadvent pulling air out of the HT (probably not necessary).
I have had it for ~1.5 years and it works really well - I keep it on the lowest setting, and I especially like the fact that there's a wire control know (with very long cable) so I can control the setting.
On the lowest setting - room is comfortable and air seems fresh, and most of all - you don't hear anything
if you raise it up you'll get a HUGE rush of air, and you'll hear what sounds like a plane taking off

Note - I bought the 8" one, so that I could keep it on the lowest setting.
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Update - I have the Hyperfan - one deadvent coming in and one deadvent pulling air out of the HT (probably not necessary).
I have had it for ~1.5 years and it works really well - I keep it on the lowest setting,
Cool. Glad you have experience with it.

So... I can't tell from pics I've seen of it whether it has a lip suitable to attach flex duct. Does it? If not, how did you hook it up?

And, is it plug-in (wall plug) or direct wire?

How do you control the speed of the fan?
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Originally Posted by HT Geek View Post
Bumping this old thread since I'm in the process of figuring this issue out and searching AVS there are not a lot of threads on the subject, so this one kept coming up. Secondly, no one ever really answered CGott42's question, so here's my take....



I've spent a fair amount of time researching this very issue. I disagree with CGott's conclusion on the Hyperfan. Here's why:
  1. I can't figure out how duct work would connect to it, based on its design
  2. I haven't been able to locate any instruction manual for their products
  3. Seems to be geared toward the pot-head growers, and that's their only market
  4. There are name-brand and vetted alternatives available for similar prices with vetted reviews and years worth of testing

Rebel: Similar conclusion to Hyperfan. My guess it's a white label (perhaps copy of) Fantech's FGC series

Vortex: All plastic - not necessarily a bad thing. My main issue with Vortex is their excessive RPM speeds. High RPM = loud.

So far, the only brands I find worth considering for inline fans are Fantech, Panasonic, and Soler & Palau. Of those, none of the Fantech are quiet. For instance, I inquired with their tech support regarding one of their new "quiet" CVS series, and the response I got was, "about 12 sone." That is ~64db. That's not quiet. That said, in the HVAC world it's not loud either. Put it in a hush box and you'd prolly be fine.

Panasonic OTOH, advertises <2 sone (<38 db; i.e. QUIET!) for some of its WhisperLine models.

S&P does not rate its "remote" fans, but from what I have been told, their -S ("silent") line is within reach of the Panasonic's when run on their low speed setting.
I have installed a variant of the Panasonic WhisperGreen line in an upstairs bathroom. Almost unbelievably quiet when not connected to anything (test run). However, I have a rather long length of (admittedly poorly routed) flex ducting, and with that connected the static pressure raises the sound level considerably. To the point where I almost want to consider metal ducting for better airflow. I put the fan in to replace a dinky $10 contractor version that is not only extremely loud but just doesn't move much air. I was really hoping for something a lot quieter in real-world use. It's absolutely not < 1 sone with any length of flex ductwork. But I'm not done yet. I will either reroute the flex with fewer bends or replace with smooth metal. But with a dead vent the *goal* is twists and turns. YMMV.

I also have what appears to be a version of the Can Fan Pro (http://www.amazon.com/Can-Fan-Pro-Se.../dp/B00GYG0MH0) which came with my rack air duct kit from Mid Atlantic. I have not yet fired it up, so I can't yet speak to that either with regard to airflow or noise, but this one will run through the ceiling of the basement play room, so I will want it to be very quiet. Right now it's connected via insulated flex that came with the rack duct kit (and installed by my HVAC contractor), but I'm considering relocating the work they did before I button things up to make the motor more accessible via a soffit panel instead of the middle of the ceiling. And perhaps adding a duct silencer and/or backdraft damper. One good thing is that it's variable speed.

I also have to either build a dead vent or add a booster fan and/or joist muffler to my current HVAC feeds to the theater room. If the rack exhaust fan works well, I'll be getting a similar Can Max Pro for that purpose. If not, I may look for one of the other fans mentioned here.

I am a few weeks out before I'll have anything wired up to report further. Electrical is my next major theater / basement task, but I'm moving slow. If I get the rack fan spun up I'll report back.
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post #20 of 20 Old 03-18-2016, 02:45 PM - Thread Starter
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Quote:
Originally Posted by HT Geek View Post
Cool. Glad you have experience with it.

So... I can't tell from pics I've seen of it whether it has a lip suitable to attach flex duct. Does it? If not, how did you hook it up?

And, is it plug-in (wall plug) or direct wire?

How do you control the speed of the fan?
plugs into a standard outlet.
there's a knob that controls the fan speed attached to a very long wire that plugs into the fan.


re: connecting duct work - I just bought an 8" duct and duct taped it to the fan (slips right on)
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