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CO2 generators DISCONTINUED

A combustion CO2 generator burns propane or natural gas to output CO2. When there is enough oxygen available in the room a "clean combustion" not producing carbon monoxide (toxic to humans) nor ethylene gas (toxic to plants) is obtained. Thus, hourly ventilation between 1 to 3 minutes is required to replenish the oxygen level for a 24 000 Btu generator. For reference, a 24,000 Btu/hour gas generator outputs about 13 standard cubic feet of CO2 per hour.

Using a gas combustion CO2 generator is considered less expensive than using bottled CO2 with a regulator. On the downside, a 12,000 Btu/hour generator contributes heat in the garden as much as a 1500 Watts heater. Some generators are offered with a heat exchanger to remove some heat from the combustion and exhaust it outside the room.  Also, 1 lb of propane gas generates 3 lbs of CO2 and 1,6 lbs of water vapour thus also adding to the room relative humidity. The cost of removing the heat and the extra humidity may offset the apparent gas combustion CO2 generator advantages. Also, a gas combustion CO2 generator requires periodic cleaning of the burner elements to maintain a clean and even combustion: so, a generator should be cleaned at the start of any 3 months culture or after every 3 months usage.

A combustion CO2 generator should be controlled according to plants needs which is best done by a horticultural CO2 controller showing the actual level in "PPM" or parts per million.

A combustion CO2 generator should be used cautiously. Combustion means there are flames and high air temperature is reached in and around the equipment and especially on top of the unit. Temperatures in excess of 400 degrees Farenheit are often reached at the top of the unit. Paper bursts into flame spontaneously in this range of temperatures. So no object of any kind should stand on top of a gas combustion CO2 generator: if suspended, the top of the gas combustion CO2 generator should be at least 18 inches (45 cm) from the ceiling and from any combustible material.

As a general rule for proper design of a grow room using combustion CO2 generation to enhance the CO2 concentration available to plants, a generator unit should not be activated more than 12 minutes per hour.

Plug'N'Grow propane combustion generator models LP4X-LP8X -

Plug'N'Grow natural gas combustion generator models NG4X - NG8X

Number of PLUG'n'GROW CO2  generators required
to get 1500 ppm in 3-5 minutes relative to garden or greenhouse volume
Dimensions
(feet)		VolumeRecommended model and
number of CO2 generators
m3 Cubic feet

iGS-LP4X

and

iGS-NG4X

iGS-LP8X

and

iGS-NG8X
10 x 8 x 8 18 640 1 ---
10 x 10 x 8 23 800 1 ---
10 x 12 x 8 27 960 1 ---
10 x 14 x 8  32 1120 2                or                1
12 x 16 x 8 43 1530 2                 or               1
12 x 25 x 8 68 2400 --- 2
15 x 35 x 8 119 4200 --- 3
20 x 40 x 8 181 6400 --- 4
25 x 40 x 8 227 8000 --- 4
In lab, 30 °C (86 °F);   CO2 start level 400 ppm; sea level; sealed room; no plants. Actual room temperature,  initial CO2 level and altitude all influence the time to reach wanted CO2 concentration. Reaching the target CO2 level takes longer in a grow room densely populated with plants. The larger the plants, the more they consume CO2 and the longer it takes to reach the target concentration.  An airtight room (no active exhaust fan), at time of  CO2 enrichment reaches target level faster.

 

Where to buy?

Chat with an agent at info@igrowing.ca or give us a call, toll free at 1-888-577-6274

Developped by Numérique Technologies

Last updated on : February 5, 2012

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