Lower 800M3/h fan to 400M3/h?

So, I need to buy a new fan/filter combo and I need it to be as silent as possible.

I figured that I should get the biggest fan I could afford (200mm, 8") and lower the RPM because larger fan w/lower RPM = quieter than smaller fan w/higher RPM.. right?

Only question is, how do I got about it?
The fan I'm thinking of buying is the S&P TD Silent 800 which has two speeds - 900M3/h and 790M3/h.

I'm going to buy the Can Lite 425 carbon filter, so I need it to be as close to 425Mh3/h as possible.

What's the easiest way of achieving this without damaging the fan?

Thanks!

I did this and with the same concerns.

I bought a variac controller, variac gives of no hum and steps the voltage correctly. It wasnt cheap and looks like a big chunky switch with 5 settings.

I highly recomend whatever system you use it is a variac system.

Safest for fan and no hum from the switch (which sounds like a fish tank hum without a variac) and can adjust speed.

Guess you know you ve hit the required speed because your house dosent smell of weed i.e. Carbon filter is working.

Others may offer better advice here.

IMO. You should buy a carbon filter that matches the m3/h that your fan maxes at.

Otherwise if you need to crank up your fan for heat removal then your filter will not be able to handle the fan running at 100%.


Do a quick google search as I'm not sure you can reduce speed on the fans you mentioned other than the fan control already on it.


I'm a SYSTEMAIR RVK fan guy myself. They're the dogs bollocks!


J

A skim of the datasheet of the fan lists only 230v 50Hz stats. If you're on 120v, the lower setting should be around the speed you're looking for.

Trackr said:

So, I need to buy a new fan/filter combo and I need it to be as silent as possible.

I figured that I should get the biggest fan I could afford (200mm, 8") and lower the RPM because larger fan w/lower RPM = quieter than smaller fan w/higher RPM.. right?

Only question is, how do I got about it?
The fan I'm thinking of buying is the S&P TD Silent 800 which has two speeds - 900M3/h and 790M3/h.

I'm going to buy the Can Lite 425 carbon filter, so I need it to be as close to 425Mh3/h as possible.

What's the easiest way of achieving this without damaging the fan?

Thanks!

Click to expand...

wow

didn't you just buy a new fan and filter combo in May !?

your moneytrain just isnt cutting it if all you can afford is a S&P TD Silent 800 and Can Lite filter

pmsl

jondamon said:

IMO. You should buy a carbon filter that matches the m3/h that your fan maxes at.

Click to expand...

The idea is that a 200mm fan at lower RPM will be less noisy than a 150mm fan while delivering the same airflow.

I'm not sure if this is correct, nor whether it's worth it to get a separate unit to control the fan as some people state that it damages the fan regardless of what you do..

Not getting a clear answer on any of these.

Teltek said:

didn't you just buy a new fan and filter combo in May !?

Click to expand...

No.. I only have one set of fan/filter and I bought it in February.

Teltek said:

your moneytrain just isnt cutting it if all you can afford is a S&P TD Silent 800 and Can Lite filter

Click to expand...

I don't understand this comment.

1.) The S&P TD Silent series is the most expensive fan series on the market and for good reason.
2.) The S&P TD Silent 800 is the second highest RPM available in my area (outside of professional equipment)

and, most importantly,

3.) The size of the fan/filter is tethered to the size of the grow room. I can afford a 3000M3/h fan, but if I use it in the room I'm currently designing it would blow the air out so quickly my plants will die from lack of CO2.

There's a reason why you only filter the air in a room every 2-3 minutes. You should know this, right? Quite pathetic.

Seriously, though. You're berating me for 'ONLY' being able to afford a 400$ fan? What's next, I 'ONLY' make $20,000 a month, I 'ONLY' have a Master's Degree in Electrical Engineering?

LMFAO.

Teltek said:

pmsl

Click to expand...

That's starting to seem like a serious medical issue, akin to how you feel the need to continuously stalk me because you're so butthurt about my success. You should get that checked out.

Trackr said:

you're so butthurt about my success.

Click to expand...

are you talking about your 2.4% success rate at cloning ?

Trackr said:

because you're so butthurt about my success.

Click to expand...

or are you talking about your success in "halving" your previous crop ?

Trackr said:

I just harvested one of the plants from my current yield and I got about 1/2 as much buds in weight compared to my last harvest.

Click to expand...

Teltek said:

are you talking about your 2.4% success rate at cloning ?

Click to expand...

You mean my 3.75% success rate? Boy, you're not good at anything, are you?

Teltek said:

or are you talking about your success in "halving" your previous crop ?

Click to expand...

No, I'm talking about how I still make enough money to live on Wallstreet, despite still being in the learning stages of my craft where you can only learn by failing.

Failure is success if you learn from it.

Like you, for instance, and your constant stalking me. You've failed each time to make any argument against me and yet you still try and try and try.

How do you justify any of that to yourself? I'm genuinely curious.

First things first.

Grow rooms have a specific set of calculations required for generating airflow requirements.

1-3x a minute is the general extraction rate.

Over 3x a minute and AC must be used as the negative pressure is too intense for plants to cope well.

I always spec as follows.

Room volume. =
This gives you extraction rate for 1x a minute.

Then add 20% for restrictions of a filter.

Add 15% for every 600-1000 open hood.
Or
Add 5% for every air cooled good.

Add up to 20% for every angle in duct work.

For every 10ft of duct add a further 10%.

This then will give you your fan requirements.

Then add a filter that exceeds the volume required from the calculations.

That way if you are dialling down your fan your filter can cope and if you have run at 100% fan power your filter can cope.

If your filter is rated a lot higher than the room volume you get longer life from the filter.



J

jondamon said:

First things first.

Grow rooms have a specific set of calculations required for generating airflow requirements.

1-3x a minute is the general extraction rate.

Over 3x a minute and AC must be used as the negative pressure is too intense for plants to cope well.

I always spec as follows.

Room volume. =
This gives you extraction rate for 1x a minute.

Then add 20% for restrictions of a filter.

Add 15% for every 600-1000 open hood.
Or
Add 5% for every air cooled good.

Add up to 20% for every angle in duct work.

For every 10ft of duct add a further 10%.

This then will give you your fan requirements.

Then add a filter that exceeds the volume required from the calculations.

That way if you are dialling down your fan your filter can cope and if you have run at 100% fan power your filter can cope.

If your filter is rated a lot higher than the room volume you get longer life from the filter.



J

Click to expand...

So, for a 20M3/h room, I could get a 600M3/h filter and run a 400M3/h fan?

Then why does everyone always talk about getting a fan and filter to match?

Trackr said:

So, for a 20M3/h room, I could get a 600M3/h filter and run a 400M3/h fan?

Then why does everyone always talk about getting a fan and filter to match?

Click to expand...

So that you don't under power it.

Most folks get for example a 6" fan and a 6" filter without checking the airflow values. Some filters have 50mm beds of carbon. Others have 22mm beds etc.

I use a 900m3/h filter with a 480m3/h fan.

I will get at least 3 years out of the filter. (RHINOPRO)

I used to run a CANLITE600 and it crapped out after 18months.


The only thing you need to make sure of is that the filter is either the same or slightly higher air volume than the fan this way the air does not pass too quickly over the carbon bed.
If it passes too quickly over the bed it won't effectively scrub the air.

That's why I pointed out about your idea of running S&P fan lower.

Trackr said:

You mean my 3.75% success rate? Boy, you're not good at anything, are you?



No, I'm talking about how I still make enough money to live in Israel, despite still being in the learning stages of my craft where you can only learn by failing.

Failure is success if you learn from it.

Click to expand...

oh come on Darren, my math is solid, it's you that changes the figures to suit your needs
my math was based on your figures of only 3 viable cuttings from 80 taken

what did you learn about cuttings with your 96.25% failure rate ?

jondamon said:

So that you don't under power it.

Most folks get for example a 6" fan and a 6" filter without checking the airflow values. Some filters have 50mm beds of carbon. Others have 22mm beds etc.

I use a 900m3/h filter with a 480m3/h fan.

I will get at least 3 years out of the filter. (RHINOPRO)

I used to run a CANLITE600 and it crapped out after 18months.


The only thing you need to make sure of is that the filter is either the same or slightly higher air volume than the fan this way the air does not pass too quickly over the carbon bed.
If it passes too quickly over the bed it won't effectively scrub the air.

That's why I pointed out about your idea of running S&P fan lower.

Click to expand...

No, I realize that a fan should run lower than the filter.. but half as much?

But okay.. the question is - should I get an 8" fan and undervolt it or a 6" fan? Which one would be more quiet?

Teltek said:

oh come on guy, my math is solid, it's you that changes the figures to suit your needs
my math was based on your figures of only 3 viable cuttings from 80 taken

Click to expand...

God, you're so adorable. I honestly can't stay mad at you. I'd have you as a pet if I could get a hold of your squirmy little butt.

My figure is also based on 3/80.. it's just that my math is actually accurate

Teltek said:

what did you learn about cuttings with your 96.25% failure rate ?

Click to expand...

Lol. Even you agree that it's 3.75%. 100 - 96.25 = 3.75%.

You're literally so dumb it makes you seem amiable.

Also, I think the real question is - what did YOU learn from my 96.25% failure rate? Since you've got so much more experience than me, you must know.

Truth of the matter is, neither of us know. This is a freak issue that will require far more than 80 cuttings to truly understand. The only reason why you or anyone else has had success is a simple coincidence.

But once I actually figure this out, I'll know far more than you ever will about propagation. That's how it goes - the bigger the hurdle, the tougher you become.

Which is why you are and always will be the little imp that I know and love

Trackr said:

God, you're so adorable. I honestly can't stay mad at you. I'd have you as a pet if I could get a hold of your squirmy little butt.

My figure is also based on 3/80.. it's just that my math is actually accurate



Lol. Even you agree that it's 3.75%. 100 - 96.25 = 3.75%.

You're literally so dumb it makes you seem amiable.

Also, I think the real question is - what did YOU learn from my 96.25% failure rate? Since you've got so much more experience than me, you must know.

Truth of the matter is, neither of us know. This is a freak issue that will require far more than 80 cuttings to truly understand. The only reason why you or anyone else has had success is a simple coincidence.

But once I actually figure this out, I'll know far more than you ever will about propagation. That's how it goes - the bigger the hurdle, the tougher you become.

Which is why you are and always will be the little imp that I know and love

Click to expand...

butt Darren it is much more than 80 cuttings, please go figure out the total cuttings that you have taken this year and the total of cuttings that have rooted. Figure out the success, or failure, rate and reconsider your claim that no skill is involved in taking cuttings.

Trackr said:

No, I realize that a fan should run lower than the filter.. but half as much?

But okay.. the question is - should I get an 8" fan and undervolt it or a 6" fan? Which one would be more quiet?



God, you're so adorable. I honestly can't stay mad at you. I'd have you as a pet if I could get a hold of your squirmy little butt.

My figure is also based on 3/80.. it's just that my math is actually accurate



Lol. Even you agree that it's 3.75%. 100 - 96.25 = 3.75%.

You're literally so dumb it makes you seem amiable.

Also, I think the real question is - what did YOU learn from my 96.25% failure rate? Since you've got so much more experience than me, you must know.

Truth of the matter is, neither of us know. This is a freak issue that will require far more than 80 cuttings to truly understand. The only reason why you or anyone else has had success is a simple coincidence.

But once I actually figure this out, I'll know far more than you ever will about propagation. That's how it goes - the bigger the hurdle, the tougher you become.

Which is why you are and always will be the little imp that I know and love

Click to expand...

I never mentioned for you to do the same.

I said you need to match your filter to your fans max output.

Your fan pushes 800m3/h So therefore you need a filter to do the same airflow.

Regardless of whether your dialing down the fan or not.

You need to plan for running the fan at max if it needs it at any point in time.



J

Teltek said:

butt guy it is much more than 80 cuttings, please go figure out the total cuttings that you have taken this year and the total of cuttings that have rooted.

Click to expand...

Lolwut?

You yourself said "my math was based on your figures of only 3 viable cuttings from 80 taken".

Now you're saying it's not 80?

Don't go full retard on me, man. You're getting close to full retard.

Teltek said:

Figure out the success, or failure, rate and reconsider your claim that no skill is involved in taking cuttings.

Click to expand...

My claim is just as valid as before.

Evidenced by the fact that you and practically everyone else has (at worst) a 3/10 cloning rate, meaning that cloning has nothing to do with skill. In fact, my cloning 'ability' was better the very first time I took cuttings.

Thus, the only logical conclusion is that some other force, regardless of skill, has taken affect.

This is proven conclusively by the fact that you yourself have no idea why my cuttings failed.

Teltek said:

There's little chance of me visiting Givatayim anytime soon Guy.

Click to expand...

Well, now I'm curious. You have my attention. How DID you figure out where I live and what my name is?

As for your comment, whether you visit Israel or not, you cannot live here meaning you cannot sell here. That's why I'll always have the upper hand.

Teltek said:

Butt maybe I will visit Israel one day and visit the Avenue that was named after my Grandfather for the contributions he made to Israeli orphanages during ww II.

Click to expand...

That's absolutely amazing!

Your grandfather saved Israeli orphans before Israel existed.. how did he manage that? Must be one of those awesome 'skillz' that run in your family, LMFAO.

Also, your grandfather saved Jews during WWII? My grandmother was 12 during WWII.. just how old are you?

Trackr said:

Lolwut?

You yourself said "my math was based on your figures of only 3 viable cuttings from 80 taken".

Now you're saying it's not 80?

Don't go full retard on me, man. You're getting close to full retard.



My claim is just as valid as before.

Evidenced by the fact that you and practically everyone else has (at worst) a 3/10 cloning rate, meaning that cloning has nothing to do with skill. In fact, my cloning 'ability' was better the very first time I took cuttings.

Thus, the only logical conclusion is that some other force, regardless of skill, has taken affect.

This is proven conclusively by the fact that you yourself have no idea why my cuttings failed.



Well, now I'm curious. You have my attention. How DID you figure out where I live and what my name is?

As for your comment, whether you visit Israel or not, you cannot live here meaning you cannot sell here. That's why I'll always have the upper hand.



That's absolutely amazing!

Your grandfather saved Israeli orphans before Israel existed.. how did he manage that? Must be one of those awesome 'skillz' that run in your family, LMFAO.

Also, your grandfather saved Jews during WWII? My grandmother was 12 during WWII.. just how old are you?

Click to expand...

My bad Darren

I'm once again medicated, something that you know nothing about as you have never smoked marijuana.

I was curious as to the total number of cuttings that you have taken since you decided to become a drug dealer ? and how many of them have rooted ? So we could figure out the total failure percentage.

I also meant to say that my grandfather had an avenue named after him in Israel after WWII because of the contributions that he made for Jewish orphans after there displacement from Nazi occupied Germany.

My grandfather was born in 1897

This post is as empty as your head.

Teltek said:

butt guy it is much more than 80 cuttings, please go figure out the total cuttings that you have taken this year and the total of cuttings that have rooted. Figure out the success, or failure, rate and reconsider your claim that no skill is involved in taking cuttings.

Click to expand...

Oh, it wasn't my bad Darren, it was yours for not reading the question correctly