Fogger

[ritzy]

My glass orchid greenhouse needs more humidity and I need to get the temperature down. Greenhouse is 16' x 36' and 10 1/2 feet to the peak. Anyone have a fogger that they can recommend. I live in southern Ontario.
Thanks - ritzy

[raybark]

While a fogger will be great for boosting humidity, they will not do as much cooling as you think they might.

Yes, cooling occurs as the water absorbs thermal energy as it evaporates, but foggers have a bit of a quandary balancing droplet size and total volume evaporated - large volume (mass) gives more potential cooling capacity, but that's usually accompanied by larger droplet size, which reduces the completion of evaporation. Reducing the water feed rate reduces the particle size and enhances the evaporation, but gives you less mass of water to absorb the energy.

I would urge you to consider a small fogger coupled with shade cloth - especially Aluminet, as it reflects, rather than absorbs the solar energy - or a swamp cooler.

[DavidCampen]

Hopefully a moderator will move this thread into the Greenhouse forum where it belongs.

I would recommend a 1000 psi fog nozzle system. Aeromist in Arizona seems to have some of the best prices.
http://www.aeromist.com/misting-pump...-1000-psi.html

I am currently using an Aquafog 700 atomizing fan in my 20'LX10'WX12'peak greenhouse
http://www.jaybird-mfg.com/
but I will move to a high pressure pump system as soon as I can afford it.

If noise is not a consideration then the Aquafog Turbo XE fans can match the output of a high pressure nozzle system and should require a bit less maintenance.
http://www.jaybird-mfg.com/Comparison.htm

[DavidCampen]

As Ray mentioned, a swamp cooler is another option to consider. One advantage of the swamp cooler and its big brother the wet wall is that they can be fed lower quality water. If high mineral content water is used in an atomizing fan or fog nozzle system then the minerals will be deposited all over your plants as a white powder; with a swamp cooler the minerals remain behind on the evaporation pads. With an atomizing fan or fog nozzle system you may find that want to use RO water.

[jean2]

A fogger is any device that creates a fog, typically containing an insecticide for killing insects and other arthropods. Foggers are often used by consumers as a low cost alternative to professional pest control services. The number of foggers needed for pest control depends on the size of the space to be treated, as stated for safety reasons on the instructions supplied with the devices. The fog may contain flammable gases, leading to a danger of explosion if a fogger is used in a building with a pilot light or other naked flame.