I was looking at my temperature monitor for the last few days where all the wonderful sun shine we are getting is pushing the temperature at 8 feet in my greenhouse over 100 degrees F, I measure at 8 feet as that is just above my hanging plants. I have a temperature monitoring system with 8 temperature probes scattered through out my 14 x 32 foot greenhouse. I can move the probes around and see what micro climates I have the greenhouse year around. I also use it to watch for hot and cold spots in the greenhouse where extremes will give me problems.
I was thinking about new ways to implement ventilation on my sealed greenhouse. This time of year is harder for me to manage the temperature in the greenhouse than during the summer. I am both trying to keep the cold out and the very expensive heat generated by my furnace in the greenhouse, and still trying to vent my excess heat from sunshine during the day. Today I could have completely opened my greenhouse and brought in outside air with the 60 degree temperature outside. A week ago it was still over 100 in my greenhouse but the outside temperature was 10 degrees. What I am getting at does any one have a really nice way to ventilate your greenhouse during the winter to get rid of excess heat generated when the sun starts to shine brightly in February and March. I currently have two winter vent ins my greenhouse one manually activated and the other has a thermostatically run fan to vent the excess heat. They barely keep my greenhouse temperature from going over 110 at 8 feet. Nicholas Plummer's question got me thinking about my system and I am trying to work out some additional ways I can automate the venting of excess heat from the greenhouse during the winter. if you have anything you are using or any ideas let me know, and lets keep this discussion online, I would like to see if we can generate something useful for the archives. thanks, Thomas Hillson [EMAIL PROTECTED] _______________________________________________ the OrchidGuide Digest (OGD) [email protected] http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com
