co2 generator question= how do you like them?

[Neptune]

????

 

[Guest]

I hang my cd-6 unit high on the wall as close to the ceiling as possiblw without being a fire hazard,the room is 8 by 8 cubed and the heat from the unit affects the room little or none.Nothing like a 1K light thats for sure!In fact with my 3K when the unit burns for 8 1/2 minutes(850 cu ft) the temps dont rise,not even a little.My dehumidifier probably causes more heat than my cd-6.Remember you want temps to be around 85 anyway,and with the hot air rising from the unit it doesnt really affect temps at the canopy of the plants.

 

[pico]

I would say my cd-12 raises the room temps around 10 degrees. This is a good thing for me because it is winter and the temps are cold.

 

[Neptune]

Thanks Pico, good info.

Would you recomend a CAP Gen-1 or a CD-12 for me?

My room is 900cu.ft.

I like the CAP model becuase it can switch from Natural Gas to Propane, and you can add more burners with ease. They are also $100-150 cheaper on ebay. Found a CAP GEN-1 for $290, and a CAP 2a Fuzzy Logic controller for $400.00.


Should I do it?
What do you guys use to control your PPMs?
Recomend the CAP Fuzzy? the IGS? or the GreenAir?

Also, Do you all have humididistats? I will need a controller for Dehumidification device, that I will also have to buy.... or should I just leave it on 24/7?



help appriciated.

-nept

 

[Guest]

To control PPms on a green air CD unit all thats needed is a cyclestat to control frequency and duration of burn.Your cd-12 raises temps 10 degrees?How high do you have your unit hung?

 

[pico]

My CD-12 is around 6 or 7 ft high. It is controlled with a CAP PPM-3 Co2 monitor. I also use the CT-DH-3p temp/humidity/co2 controller with photosensor. I found that I don't need the CT-DH-3p when using a dehumidifier and an air conditioners because those usually have those controls built in. Just need a basic timer to turn the generator off at night. If you are using intake/exaust fans then this controller is needed.

I think the Green air unit can be converted to Natural Gas as well. I don't know much about the CAP unit. I do know that my green air CT-DH-3p is not very acurate with temp/humidity. My CAP ppm-3 co2 controller is nice and keeps it within 150 ppm of setpoint at all times.

 

[Neptune]

So you are both recomending a co2 controller that uses frequency and duration, as oposed to one like the CAP 2a -- Fuzzy Logic Controller?

I'd like to be able to have a digital ppm readout, and have the ppms to remain fairly constant. I now see that the Greenair co2 generators also can covert from NG to LP... neat. I am still buying a CAP Gen-1, though. Cheaper... and CAP HQ is close by

Can I just plug my generator into a CAP PPM-3?
And plug the generator into a 12/12 on/off cycle so that it comes on onyl during Lights On?

Will this work sufficiently at keeping a set ppm? say, 900ppm week 1, 1200ppm week 2, 1500ppm weeks 3-8?

 

[Neptune]

I think I am understanding something..

The CAP 2a Fuzzy Logic controller is not ideal for Generators, becuase it will cycle the main burner off and on at high frequency...? Say... 5-10 times an hour. When Ideally you want your generator to just burn at the correct rate for a full 12 hours?

1x a day vs 50x a time on/off is better... yeah
So how do I do this?

 

[pico]

No. You want the Co2 monitor, I just wouldn't get the fuzzy logic one.

Timers are not going to keep your levels at optimal at all times. You will never know what your plants are getting.

5-10 times an hour isn't bad for a generator. The fuzzy I heard will rapidly shut on/off so that might not be the best for a generator. Just get the CAP ppm-3 unit.

1x a day vs 50 is not better. You would have a spike and then levels would drop and be low for the rest of the day. With my PPM-3, it turns on the generator when the lights come on. Brings the ppm up to whatever my setpoint is. Then when ppm drops around 100 or so ppm it will turn the generator on again to bring back up.

In my last post I was just saying you could use a timer instead of getting a photostat to turn off the generator during the dark cycle.

 

[billbob]

Neptune - You do want it to cycle on and off. Really it depends on how much money you want to spend. On the cheap you can use an on/off timer (or cycle-stat). If you want more accuracy and to be able to read the PPM, then you pay more for a digital readout unit. That sounds like what you want. Fuzzy logic is a way the computer decides how to calculate the PPM (basic). It helps to prevent too much overshot/undershot. Green Air's CDMC-6 is a nice controller. IGS makes good things (they make a great CO2 burner). The controller will turn on/off the burner many times. The more sealed a room the less times. Also to note the Green Air burners are always burning. Some have electric starts and only burn when fired. I prefer this, but the green air is a long time staple and does work well. good luck

 

[Neptune]

I bought a CAP Gen-1 and a CAP ppm-3, NG. ~$650.00 for both.

I'll let yall know how I like it.