Heat-Absorbent Humidifier

Discussion in 'Growing Marijuana Indoors' started by Sloppy G, Oct 13, 2007.

  1. Two prevalent issues that plague my indoor grow flowering room: Low humidity, excessive heat. After some soul-searching and research, I've come up with a method that helps both of these issues with almost no expense or equipment.

    Although it might just seem functional in theory, it could be a pretty cheap, simple way to kill two birds with one stone, at the expense of some floor space. Getting to the point:

    Humidity is the ammount of water vapor in the air...

    An humidifier works by applying heat to a reservoir of water in order to vaporize water at the surface; then using a fan to distribute and circulate the vaporized water into the air and nearby area.

    The magic solution?...

    Placing a flat pan full of Ice Cubes and some water, located near your plants, when the lights turn on, and set a fan to blow right across the top of the pan and towards your plants/light.


    You probably already have a fan in your grow area, and if you're dealing with heat issues, you probably also have at least a 400W bulb generating several kJ of heat while it's on.

    As the Ice (in water) melts, the temperature remains constant, but it absorbs heat from the air (that's what makes it melt). Once all the ice has melted, the temperature begins rising, approaching the room temperature. As this happens, water begins to evaporate, and if you have it set up right, humidity levels should slowly increase.

    No, dont expect the temperature of the grow area to drop significantly, because the water only absorbs a very small portion of the heat generated and only enough to melt then vaporize.

    Also, humidity levels probably wont increase by much at all if you have a well ventilated grow area, although it still does help. This method is definitely useful if you dont have great air flow in your grow area.

    Using Carbonated water, would also do the same thing while also slightly increasing CO2 levels. Only problem is, the amount of carbonation released by the water is directly related to the volume of the water released, while the method described above depends mostly on the surface-area-per-volume(or depth) of the water.

    Greater surface area (wider bowl/pan) = Increased Humidity
    Greater surface area/volume = Increased Heat Absorption
    Greater volume of Carb. Water dispensed = Increased CO2 Levels

    Of course, all this is really only about 5-10% effective in any way you look at it, but if you dont have money for an humidifier + heat pump, this is something that helps. and 10% eff. can mean the difference between 80 and 88, or 35% hum. vs. 31%.

    If anybody's got some free time, you should try it out and monitor how it affects temps over the course of a day.
  2. How about the same process but place chunks of ice with dry ice?

    The ice melts igniteing the dry ice's co2 - let the temp regulate the ice's melting point, the ice melting point regulates the co 2 emmissions.

    Time and cost might out way a daily activity of that - would certianly be worth the effort for a quick fix or good blast of co2...

    i dunno, i thought you had a neat thought...
  3. Where do you get dry ice from? Do grocery stores and supermarkets sell dry ice?
  4. yes, go to the meat dept and ask
    usually they will tell you to come back on a certain day, whenever they get their frozen meats truck.

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